WO2023134293A1 - Optical module - Google Patents

Abstract

An optical module (200), comprising a round square tube body (401), a light-emitting member (402), a light-receiving member (403), and an optical assembly (404). The light-emitting member (402) and the light-receiving member (403) are both embedded in a tube opening of the round square tube body (401). The optical assembly (404) is arranged in an inner cavity of the round square tube body (401) and comprises a baffle (4045) and a first light filter (4041). The baffle (4045) is provided with a through hole, the edge of which is hermetically connected to an inner wall of the round square tube body (401), so as to block an area except the through hole. The first light filter (4041) is arranged on the through hole and bonded to a lower side of the baffle (4045) for absorbing light of other wavelengths except received light. The through opening corresponds to the light-receiving member (403). The baffle (4045) can not only emit the received light into the light-receiving member (403) through the through hole, but also block the light of other wavelengths except the received light from being emitted into the light-receiving member (403) through the sealing connection to the round square tube body (401), so that the light received by the light-receiving member (403) is almost entirely the received light and only a small amount of emitted light, further reducing the optical crosstalk and improving the crosstalk index.

Description

an optical module

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202220092259.3 and the application name "an optical module" submitted to the China Patent Office on January 13, 2022, the entire contents of which are incorporated in this application by reference; this application Priority is claimed for a Chinese patent application filed with the China Patent Office on April 12, 2022, with application number 202210382055.8 and application name "An Optical Module", the entire contents of which are incorporated in this application by reference.

technical field

The present disclosure relates to the technical field of optical fiber communication, in particular to an optical module.

Background technique

The optical transceiver components of the 40Km 50G PAM4 (4-Level Pulse Amplitude Modulation, four-level pulse amplitude modulation) optical module include optical transmitting components, optical receiving components, round and square tubes and fiber optic adapters. Among them, the optical transmitting components and optical receiving components Both the fiber adapter and the optical fiber adapter are embedded in the mouth of the round square tube, and the round square tube is provided with a light emitting component. However, the light received by the light receiving part of the 40Km 50G PAM4 optical module includes not only the received light, but also part of the transmitted light reflected by the optical components, which is likely to cause optical crosstalk.

The optical transceiver component of the 150km BIDI BOSA (Bidirectional Bi-Directional Optical Sub-Assembly, single-fiber bidirectional optical transceiver component) optical module is currently the optical transceiver component of the general 40Km 50G PAM4 (4level Pulse Amplitude Modulation) optical module. Due to the 150km BIDI BOSA optical module, the wavelength interval between the received light and the emitted light is very small, which is more likely to cause optical crosstalk, making the crosstalk index of the optical module lower. However, the crosstalk index requirement of the optical module is very high, therefore, it is necessary to design an optical module that can improve the crosstalk index requirement.

Contents of the invention

The present disclosure provides an optical module, including:

Optical transceiver components, including round and square tubes, light emitting components, light receiving components and optical components;

A round and square pipe body is provided with a first nozzle and a second nozzle;

a light emitting component embedded in the first nozzle;

The light receiving component is embedded in the second nozzle;

The optical component is arranged in the inner cavity of the round and square tube, including a baffle and a first filter;

The baffle is provided with a through hole, the edge of which is in sealing connection with the inner wall of the round and square pipe body, and is used to block the area except the through hole in the second nozzle;

The first optical filter is arranged on the through hole, and is bonded to the side of the baffle away from the second nozzle, and is used to filter out other wavelengths of light except received light;

The through hole corresponds to the light receiving part.

Description of drawings

FIG. 1 is a schematic diagram of an electrical connection relationship of an optical communication terminal according to some embodiments;

Fig. 2 is a schematic structural diagram of an optical network terminal according to some embodiments;

Fig. 3 is a schematic structural diagram of an optical module according to some embodiments;

Fig. 4 is a schematic diagram of an exploded structure of an optical module according to some embodiments;

Fig. 5 is a schematic structural diagram of an optical transceiver component according to some embodiments;

Figure 6 is an exploded view of an optical transceiver component according to some embodiments;

Figure 7 is a cross-sectional view of an optical transceiver component according to some embodiments;

8 is a cross-sectional view of a round square tube and an optical assembly according to some embodiments;

Fig. 9 is a schematic diagram of an exploded structure of an optical component according to some embodiments;

Fig. 10 is a schematic diagram of a first angle structure of a round square tube, a baffle and a first filter according to some embodiments;

Fig. 11 is a schematic diagram of a second angle structure of a round square tube, a baffle and a first filter according to some embodiments;

Fig. 12 is a schematic structural diagram of a first angle of a baffle and a first filter according to some embodiments;

Fig. 13 is a schematic diagram of a second angle structure of a baffle and a first filter according to some embodiments;

Fig. 14 is a schematic structural diagram of a baffle according to some embodiments;

Fig. 15 is a first angle structural schematic diagram of a round square tube body according to some embodiments;

Fig. 16 is a schematic diagram of a second angle structure of a round square tube body according to some embodiments;

Fig. 17 is a schematic structural diagram of a light receiving component according to some embodiments;

Figure 18 is an exploded schematic view of a light receiving component according to some embodiments;

Fig. 19 is a schematic cross-sectional structure diagram of a light receiving component according to some embodiments;

FIG. 20 is a schematic diagram of the focal length of a light receiving component at different temperatures according to some embodiments.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described The embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present disclosure.

In optical communication technology, light is used to carry information to be transmitted, and the optical signal carrying information is transmitted to information processing equipment such as a computer through optical fiber or optical waveguide and other information transmission equipment to complete the information transmission. Because optical signals have passive transmission characteristics when they are transmitted through optical fibers or optical waveguides, low-cost, low-loss information transmission can be achieved. In addition, the signals transmitted by information transmission equipment such as optical fibers or optical waveguides are optical signals, while the signals that can be recognized and processed by information processing equipment such as computers are electrical signals. To establish an information connection between them, it is necessary to realize the mutual conversion of electrical signals and optical signals.

The optical module realizes the mutual conversion function of the above-mentioned optical signal and electrical signal in the technical field of optical fiber communication. The optical module includes an optical port and an electrical port. The optical module realizes optical communication with information transmission equipment such as optical fiber or optical waveguide through the optical port, and realizes the electrical connection with the optical network terminal (such as an optical modem) through the electrical port. It is mainly used to realize power supply, I2C signal transmission, data signal transmission and grounding, etc.; the optical network terminal transmits electrical signals to information processing equipment such as computers through network cables or Wi-Fi (Wireless Fidelity, wireless fidelity technology).

Fig. 1 is a connection diagram of an optical communication system according to some embodiments. As shown in Figure 1, the optical communication system mainly includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101 and a network cable 103;

One end of the optical fiber 101 is connected to the remote server 1000 , and the other end is connected to the optical network terminal 100 through the optical module 200 . Optical fiber itself can support long-distance signal transmission, such as signal transmission of several kilometers (6 kilometers to 8 kilometers). On this basis, if repeaters are used, ultra-long-distance transmission can theoretically be achieved. Therefore, in a common optical communication system, the distance between the remote server 1000 and the optical network terminal 100 can usually reach thousands of kilometers, tens of kilometers or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000 , and the other end is connected to the optical network terminal 100 . The local information processing device 2000 may be any one or more of the following devices: routers, switches, computers, mobile phones, tablet computers, televisions, and so on.

The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing device 2000 and the optical network terminal 100 . The connection between the local information processing device 2000 and the remote server 1000 is completed by the optical fiber 101 and the network cable 103 ; and the connection between the optical fiber 101 and the network cable 103 is completed by the optical module 200 and the optical network terminal 100 .

The optical module 200 includes an optical port and an electrical port. The optical port is configured to be connected to the optical fiber 101, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101; electrical signal connection. The optical module 200 implements mutual conversion between optical signals and electrical signals, so that a connection is established between the optical fiber 101 and the optical network terminal 100 . For example, the optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100 , and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101 .

The optical network terminal 100 includes a substantially rectangular parallelepiped housing (housing), and an optical module interface 102 and a network cable interface 104 disposed on the housing. The optical module interface 102 is configured to access the optical module 200, so that the optical network terminal 100 and the optical module 200 establish a bidirectional electrical signal connection; the network cable interface 104 is configured to access the network cable 103, so that the optical network terminal 100 and the network cable 103 A two-way electrical signal connection is established. A connection is established between the optical module 200 and the network cable 103 through the optical network terminal 100 . For example, the optical network terminal 100 transmits the electrical signal from the optical module 200 to the network cable 103, and transmits the signal from the network cable 103 to the optical module 200. Therefore, the optical network terminal 100, as the host computer of the optical module 200, can monitor the optical module 200 work. In addition to the optical network terminal 100, the host computer of the optical module 200 may also include an OLT (Optical Line Terminal, optical line terminal) and the like.

The remote server 1000 establishes a two-way signal transmission channel with the local information processing device 2000 through the optical fiber 101 , the optical module 200 , the optical network terminal 100 and the network cable 103 .

FIG. 2 is a structural diagram of an optical network terminal according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the optical network terminal 100, FIG. 2 only shows the structure of the optical network terminal 100 related to the optical module 200 . As shown in Figure 2, the optical network terminal 100 also includes a PCB circuit board (Printed Circuit Board, printed circuit board) 105 arranged in the housing, a cage 106 arranged on the surface of the PCB circuit board 105, and a cage 106 arranged on the surface of the cage 106 Internal electrical connectors. The electrical connector is configured to be connected to the electrical port of the optical module 200; the heat sink 107 has fins and other raised parts that increase the heat dissipation area.

The optical module 200 is inserted into the cage 106 of the optical network terminal 100 , and the optical module 200 is fixed by the cage 106 . The heat generated by the optical module 200 is conducted to the cage 106 and then diffused through the radiator 107 . After the optical module 200 is inserted into the cage 106 , the electrical port of the optical module 200 is connected to the electrical connector inside the cage 106 , so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100 . In addition, the optical port of the optical module 200 is connected to the optical fiber 101 , so that the optical module 200 and the optical fiber 100 establish a bidirectional electrical signal connection.

Fig. 3 is a structural diagram of an optical module according to some embodiments, and Fig. 4 is a disassembled structural diagram of an optical module according to some embodiments. As shown in FIGS. 3 and 4 , the optical module 200 includes a housing, a circuit board 300 disposed in the housing, and optical transceiver components;

The casing includes an upper casing 201 and a lower casing 202. The upper casing 201 is covered on the lower casing 202 to form the above casing with two openings 204 and 205; the outer contour of the casing is generally square.

In some embodiments, the lower case 202 includes a bottom plate and two lower side plates positioned on both sides of the bottom plate and perpendicular to the bottom plate; An upper side plate is combined with two side walls to realize that the upper case 201 is covered on the lower case 202.

The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200 , or may not be consistent with the length direction of the optical module 200 . For example, the opening 204 is located at the end of the optical module 200 (the left end in FIG. 3 ), and the opening 205 is also located at the end of the optical module 200 (the right end in FIG. 3 ). Alternatively, the opening 204 is located at the end of the optical module 200 , while the opening 205 is located at the side of the optical module 200 . Wherein, the opening 204 is an electrical port, and the golden finger of the circuit board 300 is stretched out from the electrical port 204, and is inserted into a host computer (such as the optical network terminal 100); the opening 205 is an optical port, configured to be connected to an external optical fiber 101, so that The optical fiber 101 is connected to the optical transceiver components inside the optical module 200 .

The combination of the upper case 201 and the lower case 202 is used to facilitate the installation of components such as the circuit board 300 and optical transceiver components into the case, and the upper case 201 and the lower case 202 can form packaging protection for these devices. In addition, when assembling components such as the circuit board 300 , it is convenient to deploy the positioning components, heat dissipation components and electromagnetic shielding components of these components, which is conducive to the implementation of automatic production.

In some embodiments, the upper shell 201 and the lower shell 202 are generally made of metal materials, which is beneficial to realize electromagnetic shielding and heat dissipation.

In some embodiments, the optical module 200 further includes an unlocking part 203 located on the outer wall of its housing, and the unlocking part 203 is configured to realize a fixed connection between the optical module 200 and the host computer, or release the connection between the optical module 200 and the host computer. fixed connection.

Exemplarily, the unlocking component 203 is located on the outer walls of the two lower side panels 2022 of the lower housing 202, and includes an engaging component that matches a cage of the host computer (for example, the cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the host computer, the optical module 200 is fixed in the cage of the host computer by the engaging part of the unlocking part 203; when the unlocking part 203 is pulled, the engaging part of the unlocking part 203 moves accordingly, thereby changing The connection relationship between the engaging part and the host computer is to release the engagement relationship between the optical module 200 and the host computer, so that the optical module 200 can be pulled out from the cage of the host computer.

The circuit board 300 includes circuit traces, electronic components (such as capacitors, resistors, triodes, MOS tubes) and chips (such as MCU, laser driver chips, limiting amplifier chips, clock data recovery CDR, power management chips, data processing chips DSP) wait. The circuit board 300 connects the above-mentioned devices in the optical module 200 together according to the circuit design through circuit traces, so as to realize functions such as power supply, electrical signal transmission and grounding. The electronic components may include, for example, capacitors, resistors, triodes, and MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide-Semiconductor Field-Effect Transistor). Chips can include, for example, MCU (Microcontroller Unit, micro control unit), LA (Limiting Amplifier, limiting amplifier), CDR (Clock and Data Recovery, clock data recovery chip), power management chip, DSP (Digital Signal Processing, digital signal processing )chip.

The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the bearing function, such as the rigid circuit board can carry the chip stably; the rigid circuit board can also be inserted into the electrical connector in the cage of the upper computer .

The circuit board 300 also includes gold fingers formed on the surface of its end, and the gold fingers are composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106 , and is conductively connected with the electrical connector in the cage 106 by the gold finger 301 . Gold fingers can be arranged only on one side of the circuit board 300 (for example, the upper surface shown in FIG. 4 ), or on the upper and lower sides of the circuit board 300, so as to meet the occasions where the number of pins is large. The golden finger is configured to establish an electrical connection with the host computer to realize power supply, grounding, I2C signal transmission, data signal transmission, etc. Of course, some optical modules 200 also use flexible circuit boards. Flexible circuit boards are generally used in conjunction with rigid circuit boards as a supplement to rigid circuit boards.

In certain embodiments of the present disclosure, metal pins/golden fingers are formed on one side end surface of the rigid circuit board for connecting with electrical connectors; these are not easy to realize on the flexible circuit board.

Some optical modules 200 also use flexible circuit boards; flexible circuit boards are generally used in conjunction with rigid circuit boards. For example, flexible circuit boards can be connected between rigid circuit boards and optical transceiver components as a supplement to rigid circuit boards.

Fig. 5 is a schematic structural diagram of an optical transceiver component according to some embodiments. Figure 6 is an exploded view of an optical transceiver component according to some embodiments. Figure 7 is a cross-sectional view of an optical transceiver component according to some embodiments. 8 is a cross-sectional view of a round square tube and an optical assembly according to some embodiments. Fig. 9 is a schematic diagram of an exploded structure of an optical component according to some embodiments. Fig. 10 is a schematic diagram of a first angle structure of a round square tube, a baffle and a first filter according to some embodiments. Fig. 11 is a schematic diagram of a second angle structure of a round square tube body, a baffle and a first filter according to some embodiments. Fig. 12 is a schematic diagram of a first angle structure of a baffle and a first filter according to some embodiments. Fig. 13 is a schematic diagram of a second angle structure of a baffle and a first filter according to some embodiments. Fig. 14 is a schematic structural diagram of a baffle according to some embodiments. Fig. 15 is a schematic diagram of a first angle structure of a round square tube body according to some embodiments. Fig. 16 is a schematic diagram of a second angle structure of a round square tube body according to some embodiments. As can be seen from FIGS. 5-16 , in the embodiment of the present disclosure, the optical transceiver component 400 includes a round and square tube body 401 , a light emitting component 402 , a light receiving component 403 , an optical component 404 and an optical fiber adapter 405 .

In a certain embodiment of the present disclosure, the round and square tube body 401 is provided with a first nozzle, a second nozzle and a third nozzle, which are used to carry and fix the light emitting part 402, the light receiving part 403, and the optical assembly 404 and fiber optic adapter 405. In a certain embodiment of the present disclosure, the light-emitting component 402 is embedded in the first nozzle, the light-receiving component 403 is embedded in the second nozzle, the optical component 404 is arranged in the inner cavity of the round and square tube body 401, and the optical fiber adapter 405 is embedded in at the third nozzle.

Usually, the first nozzle and the second nozzle are respectively arranged on the adjacent side walls on the round square pipe body 401, and the first nozzle and the third nozzle are respectively arranged on the side walls of the round square pipe body 401 in the length direction. , the second nozzle is arranged on the side wall of the round square tube body 401 in the width direction.

The round and square tube body 401 is generally made of metal material, which is beneficial to realize electromagnetic shielding and heat dissipation. In an embodiment of the present disclosure, the light-emitting component 402 contacts the round square tube body 401 through the first orifice, and the light-receiving component 403 contacts the round and square tube body 401 through the second orifice. The light-emitting component 402 and the light-receiving component 403 are directly press-fitted into the round and square tube body 401, and the round-square tube body 401 is in contact with the light-emitting component 402 and the light-receiving component 403 directly or through a heat-conducting medium. In this way, the round and square tube body 401 can be used for heat dissipation of the light emitting part 402 and the light receiving part 403 , ensuring the heat dissipation effect of the light emitting part 402 and the light receiving part 403 .

The light-emitting component 402 is connected to the circuit board 300 through a flexible circuit board, and a light-emitting chip is disposed therein for emitting light signals. In a certain embodiment of the present disclosure, the light emitting component 402 includes a tube base and a tube cap, the tube cap is disposed on the tube base, and the tube cap and the tube base enclose a cavity. A light emitting chip and a first lens are arranged on the stem. The optical signal emitted by the light emitting chip is collimated by the first lens and enters the optical component 404 , and is coupled to the optical fiber adapter 405 after being converged by the optical component 404 .

The light-receiving component 403 is connected to the circuit board 300 through a flexible circuit board, and a light-receiving chip is disposed therein for receiving light signals. In a certain embodiment of the present disclosure, the light receiving component 403 includes a tube base and a tube cap, the tube cap is disposed on the tube base, and the tube cap and the tube base enclose a cavity. A light receiving chip and a second lens are arranged on the tube base. The optical signal emitted by the fiber optic adapter 405 is reflected by the optical component 404 to the second lens in the light receiving component 403, and converged to the light receiving chip through the second lens.

The optical assembly 404 is arranged in the inner cavity of the round and square tube body 401, including a first filter 4041, a reflector 4042, a second filter 4043, a third lens 4044, a baffle 4045 and an isolator 4046 for adjusting The light signal emitted by the light emitting part 402 and the light signal incident to the light receiving part 403 are adjusted.

The optical component 404 is disposed in the inner cavity of the round and square tube body 401 . In a certain embodiment of the present disclosure, the upper surface of the round and square pipe body 401 is sunken inwards and provided with a first support plate 4011, a second support plate 4012, a third support plate 4013 and a fourth support plate 4014, the third The support plate 4013 is used to place the second filter 4043 , the fourth support plate 4014 is used to place the reflection sheet 4042 , and the lower side of the first support plate 4011 is used to place the third lens 4044 . In order to place the third lens 4044 on the lower side of the first support plate 4011, the first support plate 4011 can be hollowed out to form a storage cavity, and the third lens 4044 is placed in the storage cavity. Because the position of the second support plate 4012 does not need to place the optical assembly 404, the degree of depression of the second support plate 4012 is much lower than that of the third support plate 4013 and the fourth support plate 4014, and its depression is lower than or equal to that of the first support plate. 4011 degree of depression. However, in order to put the third lens 4044, the second filter 4043 and the reflector 4042 into the corresponding positions conveniently, the degree of depression of the second support plate 4012 is greater than that of the first support plate 4011, but smaller than that of the third support plate 4013 and the reflection plate 4042. The degree of depression of the fourth support plate 4014.

The first filter 4041 is located between the reflector 4042 and the baffle 4045, and is used to filter out light of other wavelengths except the received light. In a certain embodiment of the present disclosure, the first optical filter 4041 is arranged directly under the light-receiving component 403, and is glued to the side of the baffle 4045 away from the second nozzle (ie, the lower side of the baffle 4045). , that is, the first filter 4041 is located between the reflection sheet 4042 and the baffle 4045 .

The first filter 4041 is a 0° filter. A 0° filter refers to a filter with an angle of 0° between the incident light and the filter normal. That is, the incident light enters the 0° filter vertically.

The surface of the first filter 4041 is coated so that the transmittance of received light is 100%, that is, the reflectance of emitted light is 100%. When the incident light is emitted light, the incident light is vertically incident on the first optical filter 4041, and the incident light is reflected back by the original path; when the incident light is received light, the incident light is vertically incident on the first optical filter 4041, and the incident light Light is completely transmitted through.

The reflection sheet 4042 is located between the second filter 4043 and the third lens 4044 and below the first filter 4041 , so that the reflected light enters the first filter 4041 vertically. The received light or part of the emitted light is reflected by the reflector 4042 and then vertically enters the first filter 4041 .

The second filter 4043 is located on the side of the round square tube 401 close to the light-emitting part 402, and is used to transmit the emitted light into the third lens 4044, and the received light collimated by the third lens 4044 or Part of the emitted light is reflected to the reflective sheet 4042 . In a certain embodiment of the present disclosure, the emitted light emitted by the light-emitting component 402 is transmitted through the second filter 4043 into the third lens 4044, and the received light or part of the emitted light collimated by the third lens 4044 passes through the second filter 4043. The second filter 4043 is reflected to the reflection sheet 4042 .

The third lens 4044 is located on the side of the round square tube 401 close to the fiber adapter 405, and is used for coupling the emitted light into the optical fiber adapter and collimating the emitted light or received light into parallel light. In an embodiment of the present disclosure, the emitted light is coupled into the fiber optic adapter through the third lens 4044 , and the received light or part of the emitted light is collimated into parallel light through the third lens 4044 .

The baffle plate 4045, the edge of which is in sealing connection with the inner wall of the round and square pipe body 401, is used to block the area except the through hole in the second nozzle. In a certain embodiment of the present disclosure, the edge of the baffle 4045 is sealed and connected to the inner wall of the round square tube 401, which is equivalent to setting a barrier layer between the light-receiving component 403 and the optical component 404, so that light of any wavelength cannot The light enters the light receiving member 403 through the baffle plate 4045 .

The baffle 4045 includes a baffle body 40451 and a limiting protrusion 40452 . In a certain embodiment of the present disclosure, the baffle body 40451 is provided with a through hole 40453 in the center, and the side away from the direction of the second nozzle is connected to the first support plate 4011 .

The through hole 40453 corresponds to the light receiving component 403 , through which part of the emitted light and received light can enter the light receiving component 403 .

The first filter 4041 is disposed on the through hole 40453 , and the first filter 4041 is used to filter out other wavelengths of light other than the received light, so that only the received light enters the light receiving component 403 through the through hole 40453 . Wherein, the edge of the through hole 40453 is located on the first filter 4041 .

Although almost all light cannot enter the light receiving component 403 through the baffle 4045 , and the received light enters the light receiving component 403 through the through hole 40453 , but some emitted light still enters the light receiving component 403 . In order to reduce the emitted light from entering the light-receiving component 403 , an absorbing layer is provided on the surface of the baffle 4045 , and the edge of the baffle 4045 is connected to the inner wall of the round square tube by black glue. The absorbing layer is a structural layer obtained by blackening the baffle 4045, and the absorbing layer can absorb light of other wavelengths except received light. The black glue can not only seal the edge of the baffle 4045 and the inner wall of the round square tube body, further reducing the incident light entering the receiving part 403; it can also absorb light of other wavelengths except the receiving light, further reducing the incident light entering the receiving part 403 Component 403, reducing optical crosstalk.

The limit protrusion 40452 is extended from the side of the baffle body 40451 away from the direction of the second nozzle, does not contact the through hole 40453, is located on the side of the round square tube close to the light emitting part, and is in contact with the second support plate 4012 connected. In a certain embodiment of the present disclosure, a limiting protrusion 40452 extends from a partial area of the lower side of the baffle body 40451 . The limiting protrusion 40452 is away from the through hole 40453 and is not in contact with the through hole 40453 . The limiting protrusion 40452 is located on the side of the round and square tube body 401 close to the light emitting component 402 . The limiting protrusion 40452 is in contact with the second support plate 4012 and may also be in contact with the second filter 4043 .

The height difference of the limit protrusion 40452 is equal to the height difference between the first support plate 4011 and the second support plate 4012, which can make the baffle plate 4045 closely contact with the first support plate 4011 and the second support plate 4012, and increase the contact between the baffle plate 4045 and the second support plate 4012. The contact area between the first support plate 4011 and the second support plate 4012 further reduces the light other than the received light entering the light receiving component 403 .

The isolator 4046 not only prevents the emitted light from the light emitting part from returning to the light emitting part, but also prevents the received light from entering the light emitting part. Due to the existence of the isolator 4046, the received light cannot enter into the light emitting part, and the optical crosstalk in the light emitting part is avoided.

Optical fiber adapter 405, used for connecting optical fibers. In a certain embodiment of the present disclosure, the light emitting part 402 is embedded in the first nozzle of the round square tube, the light receiving part 403 is embedded in the second nozzle of the round square tube, and the optical fiber adapter 405 is embedded in the round square tube The third nozzle of the body, the light emitting part 402 and the light receiving part 403 establish optical connections with the optical fiber adapter 405 respectively. The optical signal sent by the light emitting part 402 and the light received by the light receiving part 403 are both transmitted through the same optical fiber in the optical fiber adapter 405, that is, the same optical fiber in the optical fiber adapter 405 is the transmission channel for the optical transceiver part to enter and exit light. The components realize single-fiber bidirectional optical transmission mode.

The fiber optic adapter 405 includes a casing 4051 and a fiber ferrule 4052 disposed in the casing 4051 . Optical fiber ferrule 4051 can be formed by wrapping optical fiber with ceramic material. The optical fiber is used to transmit light. Ceramic has high processing accuracy and can achieve high-precision position alignment. The optical fiber ferrule is composed of optical fiber and ceramic, and is realized by fixing the ceramic. fixed to the optical fiber. The ceramic material limits the fixed direction of the optical fiber in the fiber ferrule. Generally, the ceramic is processed into a cylinder, and a linear through hole is set in the center of the ceramic cylinder, and the optical fiber is inserted into the through hole of the ceramic cylinder to achieve fixation, so the optical fiber is straight fixed in the ceramic body; in the fiber ferrule, the axial direction of the optical fiber is parallel to the axial direction of the optical fiber ferrule 4052 .

The light is injected into the optical fiber through the air, and no refraction will occur when the light is vertically injected into the end face of the optical fiber. This method is easy to control the angle relationship between the light output direction of the laser chip and the fiber ferrule, but the vertical incidence will cause the reflected light to return along the original optical path. The returned reflected light enters the baffle through the second filter and reflector;

In order to prevent the reflected light from returning along the original optical path, the optical path design makes the light non-perpendicularly incident on the fiber end face; in order to realize the non-perpendicular incident light on the fiber end face, the fiber end face is ground into a bevel. In an embodiment of the present disclosure, the optical fiber is wrapped in ceramics to form a fiber ferrule, and the end face of the fiber ferrule is ground into a bevel, and the end face of the fiber in the fiber ferrule becomes a bevel accordingly.

In a certain embodiment of the present disclosure, the fiber ferrule is made of a ceramic cylinder that wraps the optical fiber. The axis direction of the fiber ferrule is the same as the axis direction of the fiber. The optical fiber is composed of a core layer and a cladding layer with different refractive indices, and the light is totally reflected at the interface between the core layer and the cladding layer, thereby constraining the transmission in the core layer.

The end surface of the fiber optic ferrule 4052 is coated with an anti-reflection film.

Anti-reflection coating is a transparent dielectric film used to reduce reflection loss. In a certain embodiment of the present disclosure, the incident light is transmitted to the end face of the optical fiber through the anti-reflection, so as to reduce light reflection and return of light through the original path, thereby effectively reducing light return loss.

Received light:

The received light received by the fiber ferrule of the fiber optic adapter is collimated by the third lens, then reflected by the second filter and the reflection plate, and then vertically enters the first filter and is coupled to the light receiving component. Although part of the received light is transmitted to the light-emitting part through the second filter, an isolator is arranged in the light-emitting part, so that part of the received light directed to the light-emitting part cannot be injected into the light-emitting part, and light will not be caused. crosstalk.

Emitted light:

The emission light emitted by the light emitting component is transmitted to the third collimating lens through the second filter, and coupled to the end face of the fiber optic ferrule of the fiber optic adapter through the third collimating lens. Part of the emitted light is reflected at the end face of the fiber ferrule, collimated along the third collimating lens, and then vertically enters the first filter after being reflected by the second filter and the reflector. However, since the function of the first optical filter is to filter out all light except the received light, the edges of the through holes are located on the first optical filter, so that the emitted light cannot enter the light receiving component through the through hole. Due to the existence of the baffle, it is almost impossible for the emitted light to enter the light receiving part, thereby further reducing optical crosstalk and improving the crosstalk index.

The present disclosure provides an optical module 200, including an optical transceiver component. The optical transceiver part includes a round and square tube body, a light emitting part, a light receiving part and an optical assembly. The round square tube body is provided with a first nozzle and a second nozzle, the light emitting part is embedded in the first nozzle, and the light receiving part is embedded in the second nozzle. The optical component is arranged in the inner cavity of the round and square tube body, including a baffle and a first optical filter. The baffle is provided with a through hole, the edge of which is sealingly connected with the inner wall of the round and square pipe body, and is used to block the area of the second nozzle except the through hole. The first optical filter is arranged on the through hole and bonded to the side of the baffle far away from the second nozzle, and is used for absorbing light of other wavelengths except the received light. The through hole corresponds to the light receiving part. In the present disclosure, the edge of the baffle is sealed and connected to the inner wall of the round square tube body, which is equivalent to setting a barrier layer between the light receiving component and the optical component, so that light of any wavelength cannot enter the light receiving component through the baffle; but The baffle is provided with a through hole, and the first optical filter is arranged on the through hole, and the first optical filter can filter out light of other wavelengths except the received light, so that only the received light enters the light receiving component through the through hole. Since the light received by the light receiving part is almost all the received light and only a small amount of emitted light, even if the wavelength interval between the emitted light and the received light is very small, it is not easy to cause optical crosstalk, thereby improving the optical crosstalk index. In the present disclosure, the baffle can not only inject the received light into the light-receiving component through the through hole, but also block light of other wavelengths except the received light from entering the light-receiving component through the sealed connection with the round square tube, so that the light receiving The light received by the component is almost all the received light and only a very small amount of emitted light, which further reduces optical crosstalk and improves the crosstalk index.

In the present disclosure, the edge of the baffle is sealed and connected to the inner wall of the round square tube body, which is equivalent to setting a barrier layer between the light receiving component and the optical component, so that light of any wavelength cannot enter the light receiving component through the baffle; but The baffle plate is provided with a through hole, and the first optical filter is arranged on the through hole, and the first optical filter can filter out light of other wavelengths except the received light, so that only the received light enters the light receiving component through the through hole. Since the light received by the light receiving part is almost all the received light and only a small amount of emitted light, even if the wavelength interval between the emitted light and the received light is very small, it is not easy to cause optical crosstalk, thereby improving the optical crosstalk index. In the present disclosure, the baffle can not only inject the received light into the light-receiving component through the through hole, but also block light of other wavelengths except the received light from entering the light-receiving component through the sealed connection with the round square tube, so that the light receiving The light received by the component is almost all the received light and only a very small amount of emitted light, which further reduces optical crosstalk and improves the crosstalk index.

In addition, in the actual application process of the optical module 200, in the optical module 200 of the TO (Transistor Outline, transistor outline) package series, the focus of light is usually achieved through a lens. When the distance of the TO light-receiving part (referred to as "light output distance") is equal to or infinitely close to the focal length of the TO light-receiving part, the photoelectric conversion efficiency of the TO light-receiving part is the highest, and the corresponding photocurrent is larger. After the optical device is assembled, the light output distance has been completely fixed by the structure and cannot be changed. Therefore, the photoelectric conversion efficiency is relatively fixed. If the optical power is large (overload) or small (sensitivity), the TO light receiving part can be changed. By increasing the focal length, a larger working range of the optical device can be realized.

As a possible implementation manner, in order to improve the communication stability of the optical module 200, the optical module 200 provided in the present disclosure further includes a receiving optical fiber, and the optical receiving component is disposed on the side of the light outlet of the receiving optical fiber. Next, the structure and function of the light receiving member will be described.

The optical transceiver unit 400 includes a light emitting unit and a light receiving unit. 17 is a schematic structural view of a light receiving component according to some embodiments, FIG. 18 is an exploded schematic view of a light receiving component according to some embodiments, and FIG. 19 is a cross-sectional view of a light receiving component according to some embodiments Schematic. The TO light-receiving component of the TO package series generally includes: a tube base 502 and a tube cap 501 covering the top of the tube base 502 , and a lens 503 is arranged on the tube cap 501 . The lens 503 is used to focus external signal light. A photodetection chip 5021 is provided on the upper surface of the stem 502 for converting optical signals into electrical signals.

The tube base 502 has a plurality of pins 504, the pins 504 pass through the tube base 502 and protrude from the surface of the tube base 502, and the pins 504 are wrapped by glass to realize the insulation between the pins 504 and the tube base 502 . The photoelectric device is sealed between the tube base 502 and the tube cap 501 , and establishes electrical connection with the outside through the pin 504 passing through the tube base 502 .

After the optoelectronic device is assembled, the light output distance has been fixed by the structure and cannot be changed, and due to the existence of equipment accuracy and assembly errors, the focal length of the TO light receiving part and the light output distance cannot be completely coincident. When the focal length of the TO light-receiving part is greater than the light-emitting distance, it is called "over-focus assembly", and when the focal length of the TO light-receiving part is smaller than the light-emitting distance, it is called "out-of-focus assembly".

When the optical power is large or small, in order to improve the communication quality of the optical module 200, the present disclosure provides an optical module 200, which uses the characteristic that the refractive index of the light-transmitting liquid changes greatly with temperature, and adjusts the temperature of the light-transmitting liquid through a temperature control device , to realize the adjustment of the focal length of the light-receiving part, thereby adjusting the photoelectric conversion efficiency of the light-receiving part and improving the sensitivity of the light-receiving part.

In a certain embodiment of the present disclosure, the present disclosure proposes an optical module 200, by adjusting the temperature of the liquid coated on the outside of the lens and adjusting the focal length of the TO light-receiving component, the photoelectric conversion efficiency of the light-receiving component is adjusted. adjust. The optical module 200 in the present disclosure includes: a receiving optical fiber, the port of which is located on one side of the photodetector, and coaxially arranged with the photodetector. The liquid support 505 is disposed above the tube cap 501 , and the lower surface of the liquid support 505 is connected to the upper surface of the tube cap 501 . The liquid holder 505 is provided with a liquid storage tank, and a light-transmitting liquid 5051 is arranged in the liquid storage tank.

The bottom of the liquid holder 505 is provided with a lens through hole, which communicates with the liquid storage tank, and is used for installing and fixing the lens. The converging lens 503 runs through the tube cap 501, and one end protrudes from the upper surface of the tube cap 501, and is immersed in the light-transmitting liquid in the liquid storage tank. The liquid support 505 is provided with a light window opening, which is located on the opposite side of the lens through hole, and the light window opening is provided with a flat window light-transmitting plate 5053 . The light-transmitting plate 5053 of the flat window, the converging lens 503 and the photodetection chip 5021 are arranged coaxially.

The light window opening is arranged between the receiving optical fiber and the photodetector. In order to reduce errors, the light-transmitting liquid fills the space between the liquid holder 505 and the opening of the light window, that is, no air bubbles exist between the glass plate and the light-transmitting liquid.

In order to adjust the temperature of the light-transmitting liquid, a temperature-regulating device 506 is provided on the liquid support 505 for generating heat to adjust the temperature of the light-transmitting liquid.

In order to facilitate the installation of the temperature regulating device 506 and increase the heat dissipation effect of the temperature regulating device 506 , the liquid support 505 is provided with a temperature control platform connected to the temperature regulating device 506 . The temperature control platform is used to carry the temperature adjustment device 506 and has good heat conduction effect, and the surface of the temperature control platform is a plane, which is in contact with the temperature adjustment device 506 .

In the embodiment of the present disclosure, the lens is disposed in the liquid holder 505 , and the upper surface of the light-transmitting liquid is higher than the upper surface of the lens, that is, the light-transmitting liquid completely covers the part of the converging lens 503 protruding from the tube cap 501 .

The temperature regulating device can be a TEC (Thermo Electric Cooler, semiconductor refrigerator) or a thermocouple, etc.

The liquid support 505 is a heat-conducting material, and the material of the liquid support 505 includes but is not limited to tungsten copper, raft alloy, SPCC (Steel Plate Cold rolled Commercial, cold-rolled carbon steel), copper, etc., so as to transfer the heat generated by the temperature adjustment device to the In the light-transmitting liquid, adjust the temperature of the light-transmitting liquid.

The converging lens 503 is arranged above the photodetection chip 5021 to converge the signal light, and the converging signal light is converted into an electrical signal by the electric detection chip 5021 . One end of the lens passes through the lens through hole, protrudes from the upper surface of the tube cap 501, and is immersed in the light-transmitting liquid in the liquid storage tank.

The disclosure uses the characteristic that the refractive index of the light-transmitting liquid changes relatively with temperature, seals a specific light-transmitting liquid outside the lens, and adjusts the temperature of the liquid through a temperature control device to realize the change of the refractive index and further the change of the focal length.

As shown in the figure below, when the temperature is A and the temperature is B, the refractive index of the liquid is different, resulting in a change in the light path, which in turn produces a different focal length.

20 is a schematic diagram of the focal length of a light receiving component at different temperatures according to some embodiments. As shown in the figure, temperature B is higher than temperature A, and the focal length of the light receiving component at temperature B is greater than that of the light receiving component at temperature Focal length at temperature A.

The controller is connected with the photoelectric detection chip 5021, collects the current optical power value, and adjusts the driving current of the temperature regulating device according to the relationship between the current optical power value and the preset threshold value, so as to adjust the temperature of the light-transmitting liquid. The upper limit value of optical power and the lower limit value of optical power are set in the controller, and the temperature of the temperature regulating device is adjusted according to the comparison between the current optical power value and the upper limit value of optical power and the lower limit value of optical power.

When the focal length of the TO light-receiving part is greater than the light-emitting distance (over-focus assembly), the controller is configured to: when the current optical power value is greater than the upper limit value of the optical power, adjust the driving current of the temperature adjustment device to increase the temperature of the light-transmitting liquid. high. As the temperature of the light-transmitting liquid increases, the refractive index of the light-transmitting liquid becomes smaller, and the focal length of the TO light-receiving part becomes larger. On the basis that the focal length of the TO light-receiving part is greater than the light-emitting distance, the focal length of the TO light-receiving part becomes larger. Reduce the photoelectric conversion efficiency of the optical device, thereby reducing the size of the photocurrent, and ensure that the photodetector is not damaged by excessive power light. When the current optical power value is less than the lower limit value of the optical power, the driving current of the temperature regulating device is adjusted to reduce the temperature of the light-transmitting liquid. When the temperature of the light-transmitting liquid decreases, the refractive index of the light-transmitting liquid becomes larger, and the focal length of the TO light-receiving part becomes smaller. On the basis that the focal length of the TO light-receiving part is greater than the light-emitting distance, the focal length of the light-receiving part becomes smaller, and the TO light The focal length of the receiving part is closer to the light output distance, which improves the photoelectric conversion efficiency of the optical device, thereby increasing the size of the photocurrent and improving the sensitivity of the device.

When the focal length of the TO light receiving part is less than the light output distance (out-of-focus assembly), the controller is configured to: when the current optical power value is greater than the upper limit value of the optical power, adjust the driving current of the temperature regulating device to reduce the temperature of the light-transmitting liquid . As the temperature of the light-transmitting liquid decreases, the refractive index of the light-transmitting liquid increases, and the focal length of the TO light-receiving member decreases. On the basis that the focal length of the TO light-receiving part is smaller than the light-emitting distance, the focal length of the TO light-receiving part becomes smaller, and the difference between the focal length of the TO light-receiving part and the light-emitting distance becomes larger, which reduces the photoelectric conversion efficiency of the optical device, thereby reducing the photocurrent. The size of the photodetector is guaranteed not to be damaged by excessive power light. When the current optical power value is less than the lower limit value of the optical power, the driving current of the temperature regulating device is adjusted to increase the temperature of the light-transmitting liquid. As the temperature of the light-transmitting liquid increases, the refractive index of the light-transmitting liquid becomes smaller, and the focal length of the TO light-receiving part becomes larger. On the basis that the focal length of the TO light-receiving part is smaller than the light-emitting distance, the focal length of the TO light-receiving part becomes larger. The focal length of the TO light-receiving part is closer to the light-emitting distance, which improves the photoelectric conversion efficiency of the optical device, thereby increasing the size of the photocurrent and improving the sensitivity of the device.

In some embodiments of the present disclosure, the controller may be a device built inside the MCU, or a device independently configured outside the MCU. A controller independently provided outside the MCU is provided on the circuit board.

In some embodiments of the present disclosure, in order to avoid loss of light, the transmittance of the light-transmitting liquid is greater than or equal to 95%, and the transmittance does not change with time and temperature, or the transmittance changes with time and temperature Not obvious. Specific species and content of substances contained in the light-transmitting liquid are not specifically limited.

In order to prevent the light-transmitting liquid from changing qualitatively and affecting the optical stability, the light-transmitting liquid is chemically inert and does not react chemically with the liquid holder 505 and the lens. The lens is disposed in the liquid holder 505 , and the upper surface of the light-transmitting liquid is higher than the upper surface of the lens, that is, the light-transmitting liquid completely covers the part of the lens protruding from the cap 501 .

The optical module 200 of the present disclosure includes: a receiving optical fiber, the port of which is located on one side of the photodetector and coaxially arranged with the photodetector. The liquid support 505 is disposed above the tube cap 501 , and the lower surface of the liquid support 505 is connected to the upper surface of the tube cap 501 . The liquid holder 505 is provided with a liquid storage tank, and a light-transmitting liquid is arranged in the liquid storage tank. The bottom of the liquid holder 505 is provided with a lens through hole, which communicates with the liquid storage tank, and is used for installing and fixing the lens. The lens runs through the tube cap 501, and one end protrudes from the upper surface of the tube cap 501, and is immersed in the light-transmitting liquid in the liquid storage tank. The liquid support 505 is provided with a light window opening, which is located on the opposite side of the lens through hole, and a glass plate is provided at the light window opening. The glass plate, the lens and the photodetector are coaxially arranged. A temperature regulating device is also provided on the liquid support 505 for generating heat and regulating the temperature of the light-transmitting liquid. The controller is connected with the temperature adjustment device, and the controller is also connected with the photoelectric detection chip, collects the current optical power value, and adjusts the driving current of the temperature adjustment device according to the relationship between the current optical power value and the preset threshold value, so as to adjust the temperature of the light-transmitting liquid. temperature. The upper limit value of optical power and the lower limit value of optical power are set in the controller, and the temperature of the temperature regulating device is adjusted according to the comparison between the current optical power value and the upper limit value of optical power and the lower limit value of optical power.

In the embodiment of the present disclosure, in the test phase of the optical module 200, the difference between the focal length of the TO light receiving part and the light emitting distance is compared. When the focal length of the light receiving part is greater than the light emitting distance, the controller is configured to: the current optical power value is greater than the optical power When the upper limit value is reached, adjust the driving current of the temperature regulating device, so that the temperature of the light-transmitting liquid increases, the focal length of the light-receiving part becomes larger, and the photoelectric conversion efficiency of the optical device is reduced, thereby reducing the size of the photocurrent, ensuring that the photodetector Excessive power light damage. When the current optical power value is less than the lower limit value of the optical power, the driving current of the temperature regulating device is adjusted to reduce the temperature of the light-transmitting liquid. As the temperature of the light-transmitting liquid decreases, the refractive index of the light-transmitting liquid increases, and the focal length of the light-receiving component decreases to improve the photoelectric conversion efficiency of the optical device, thereby increasing the size of the photocurrent and improving the sensitivity of the device. The focal length of the TO light-receiving component is smaller than the light-emitting distance, and the controller is configured to adjust the driving current of the temperature regulating device when the current optical power value is greater than the upper limit value of the optical power, so as to reduce the temperature of the light-transmitting liquid. As the temperature of the light-transmitting liquid decreases, the refractive index of the light-transmitting liquid increases, and the focal length of the TO light-receiving member decreases. When the current optical power value is greater than the upper limit value of the optical power, the driving current of the temperature adjustment device is adjusted to reduce the temperature of the light-transmitting liquid. When the temperature of the light-transmitting liquid decreases, the refractive index of the light-transmitting liquid increases, and the focal length of the TO light-receiving part becomes smaller.

The concentricity measuring device provided in the present disclosure is also applicable to a TO-packaged light-emitting component, referred to as a TO light-emitting component. The TO light-emitting component includes: a light-emitting tube base and a light-emitting tube cap covering the top of the light-emitting tube base, and a collimating lens is arranged on the light-emitting tube cap. The collimating lens is used to collimate the internal signal light. A light emitting chip is arranged on the upper surface of the light emitting tube base for converting electrical signals into optical signals. The other side of the collimator lens is provided with a launch fiber, and the light signal sent by the light launch chip enters the launch fiber after passing through the collimator lens.

The light-emitting tube base has a plurality of light-emitting pins, the light-emitting pins pass through the light-emitting tube base and protrude from the surface of the light-emitting tube base, and the light-emitting pins are wrapped by glass to realize the connection between the light-emitting pins and the light-emitting tube base. Insulation between light emitting sockets. The photoelectric device is sealed between the light-emitting tube base and the light-emitting tube cap, and establishes electrical connection with the outside through the light-emitting pin passing through the light-emitting tube base.

In order to facilitate the monitoring of the light emission signal, the light path of the front light exit of the light emission chip is set towards the converging lens, and the light path of the rear light exit is provided with a second photodetector. The light emitting distance in the light emitting part is the distance between the light emitting port of the emitting fiber and the TO light emitting part.

The emitting liquid support is arranged above the light emitting tube cap, and the lower surface of the emitting liquid support is connected with the upper surface of the light emitting tube cap. The emitting liquid support is provided with a liquid storage part, and a light-transmitting liquid is arranged in the liquid storage part. The bottom of the emitting liquid bracket is provided with an emitting lens through hole, which communicates with the liquid storage part and is used for installing and fixing the collimating lens. The collimating lens runs through the tube cap, and one end protrudes from the upper surface of the light emitting tube cap, and is immersed in the emitting light-transmitting liquid in the liquid storage part. The emission liquid bracket is provided with an emission window opening, which is located on the opposite side of the through hole of the collimator lens, and an emission glass plate is arranged at the emission window opening. The emitting glass plate, the collimating lens and the light emitting chip are coaxially arranged. The emitting liquid support is also provided with a second temperature regulating device for generating heat to adjust the temperature of the emitting light-transmitting liquid in the emitting liquid support. The second controller is connected to the second temperature adjustment device, and the second controller is also connected to the second photodetection chip to collect the current emitted optical power value, and adjust the second temperature according to the relationship between the current emitted optical power value and the preset threshold value The drive current of the device is adjusted to adjust the temperature of the light-emitting liquid. The upper limit value of optical power and the lower limit value of optical power are set in the second controller, and the temperature of the second temperature regulating device is adjusted according to the comparison between the current emission optical power value and the upper limit value of emission optical power and the lower limit value of emission optical power.

When the focal length of the TO light emitting part is greater than the light output distance (overfocus assembly), the second controller is configured to: when the current emitted optical power value is greater than the upper limit value of the emitted optical power, adjust the driving current of the second temperature adjustment device so that The temperature of the light-emitting liquid increases. When the temperature of the emitting light-transmitting liquid increases, the refractive index of the emitting light-transmitting liquid becomes smaller, and the focal length of the TO light-emitting part becomes larger. On the basis that the focal length of the TO light-emitting part is greater than the light-emitting distance, the focal length of the TO light-emitting part becomes larger. Large, reducing the photoelectric conversion efficiency of optical devices. When the current emitted light power value is less than the lower limit value of the emitted light power, the driving current of the second temperature adjustment device is adjusted to reduce the temperature of the light-emitting liquid. When the temperature of the emitting light-transmitting liquid decreases, the refractive index of the emitting light-transmitting liquid becomes larger, and the focal length of the TO light-emitting part becomes smaller. On the basis that the focal length of the TO light-emitting part is greater than the light-emitting distance, the focal length of the TO light-emitting part becomes smaller. , the focal length of the TO light-emitting component is closer to the light-emitting distance, which improves the photoelectric conversion efficiency of the optical device, thereby increasing the optical signal.

When the focal length of the TO light emitting part is less than the light output distance (out-of-focus assembly), the second controller is configured to: when the current emitted optical power value is greater than the upper limit value of the emitted optical power, adjust the driving current of the second temperature adjustment device so that The temperature of the light-emitting liquid decreases. As the temperature of the light-emitting liquid decreases, the refractive index of the light-emitting liquid increases, and the focal length of the TO light-emitting part becomes smaller. On the basis that the focal length of the TO light-emitting part is smaller than the light-emitting distance, the focal length of the TO light-emitting part becomes smaller, and the difference between the focal length of the TO light-emitting part and the light-emitting distance becomes larger, which reduces the photoelectric conversion efficiency of the optical device, thereby reducing the optical signal. Strength of. When the current emitted light power value is less than the lower limit value of the emitted light power, the driving current of the second temperature adjustment device is adjusted to increase the temperature of the light-emitting liquid. As the temperature of the emitting light-transmitting liquid increases, the refractive index of the emitting light-transmitting liquid becomes smaller, and the focal length of the TO light-emitting part becomes larger. On the basis that the focal length of the TO light-emitting part is smaller than the light-emitting distance, the focal length of the TO light-emitting part becomes larger. Larger, the focal length of the TO light-emitting component is closer to the light-emitting distance, which improves the photoelectric conversion efficiency of the optical device, thereby increasing the intensity of the optical signal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions and scope of the embodiments of the present disclosure.

Claims (18)

1. An optical module, comprising:

   Optical transceiver components, including round and square tubes, light emitting components, light receiving components and optical components;

   The round and square pipe body is provided with a first nozzle and a second nozzle;

   The light emitting component is embedded in the first nozzle;

   The light receiving component is embedded in the second nozzle;

   The optical assembly is arranged in the inner cavity of the round and square tube, including a baffle and a first filter;

   The baffle plate is provided with a through hole, the edge of which is sealingly connected with the inner wall of the round and square pipe body, and is used to block the area of the second nozzle except the through hole;

   The first optical filter is arranged on the through hole and bonded to the side of the baffle away from the second orifice to filter out other wavelengths of light except the received light;

   The through hole corresponds to the light receiving part.
2. The optical module according to claim 1, the surface of the baffle is provided with an absorbing layer;

   The absorbing layer is used to absorb light of other wavelengths except the received light.
3. According to the optical module according to claim 1, the edge of the baffle is sealed and connected with the inner wall of the round square tube body through black glue, wherein the black glue can absorb light of other wavelengths except the received light.
4. The optical module according to claim 1, the optical transceiver component further comprises an optical fiber adapter;

   The optical fiber adapter is embedded in the third nozzle of the round and square tube body, including an optical fiber ferrule;

   The end face of the optical fiber ferrule is inclined.
5. According to the optical module according to claim 4, an anti-reflection film is coated on the end surface of the optical fiber ferrule.
6. The optical module according to claim 2, the baffle comprises a baffle body and a limiting protrusion;

   The baffle body is provided with the through hole in the center, and the side away from the direction of the second nozzle is connected to the first support plate;

   The limiting protrusion is obtained by extending from the side of the baffle body away from the direction of the second nozzle, does not contact the through hole, and is located in the round square tube close to the light emitting part One side of the support plate is connected with the second support plate, wherein both the first support plate and the second support plate are formed by inward depression of the upper surface of the round square tube body, and the degree of depression of the second support plate is greater than that of the The degree of depression of the first support plate.
7. The optical module according to claim 4, the optical assembly further comprises a second filter, a reflector and a third lens, wherein:

   The second optical filter is located on the side of the round square tube close to the light-emitting part, and is used to transmit the emitted light into the third lens and collimate the light after being collimated by the third lens. The received light or part of the emitted light is reflected to the reflective sheet;

   a reflector, located below the first filter, and between the second filter and the third lens, so that the reflected light is vertically incident on the first filter;

   The third lens, located on the side of the round square tube close to the fiber adapter, is used to couple the emitted light into the optical fiber adapter and collimate the emitted light or received light into parallel light .
8. The optical module according to claim 1, wherein an isolator is arranged in the emitting part;

   The isolator is used to prevent the emitted light emitted by the light emitting component from returning to the light emitting component.
9. According to the optical module according to claim 1, the optical module further includes a receiving optical fiber, the optical receiving component is arranged on the side of the light outlet of the receiving optical fiber, and the side of the light outlet of the receiving optical fiber is the second nozzle On one side, the light receiving part includes:

   A photoelectric detection chip, which receives the light of the receiving optical fiber and converts it into an electrical signal;

   The liquid support is arranged between the photoelectric detection chip and the receiving optical fiber, one end of which is provided with a lens through hole, and the opposite side of the lens through hole is provided with a light window opening; the inside of the liquid support is hollow, and there is a There is a light-transmitting liquid; the refractive index of the light-transmitting liquid decreases as the temperature increases;

   A converging lens, partially protruding from the inside of the liquid support through the lens through hole, is used to converge the light of the receiving optical fiber on the photodetection chip; the light-transmitting liquid covers the convex lens of the converging lens The part out of the liquid bracket; the flat window light-transmitting plate, which is arranged at the opening of the light window; the light of the receiving optical fiber passes through the flat window light-transmitting plate, the light-transmitting liquid, and the converging lens in sequence After reaching the photoelectric detection chip, it is converted into an electrical signal;

   a temperature regulating device, arranged on the liquid support;

   A controller, connected to the temperature adjustment device, is used to adjust the temperature adjustment device to change the temperature of the light-transmitting liquid.
10. According to the optical module according to claim 9, said adjusting the temperature adjustment device to change the temperature of the light-transmitting liquid includes obtaining the current optical power value according to the electrical signal, and obtaining the current optical power value according to the light-emitting distance of the light-receiving component The comparison with the distance of the focal length of the light-receiving component, the comparison between the current optical power value and the preset optical power upper limit value and optical power lower limit value, adjust the temperature of the temperature adjustment device to change the The focal length of the light-receiving element described above.
11. According to the optical module according to claim 10, according to the comparison between the light output distance of the light receiving component and the focal length of the light receiving component, the current optical power value and the preset optical power upper limit value, optical power The comparison of the lower limit value to adjust the temperature of the temperature regulating device includes:

    The light output distance of the light receiving component is less than the focal length of the light receiving component, and the current optical power value is greater than the preset optical power upper limit value, the controller adjusts the power supply current of the temperature adjustment device , to increase the temperature of the liquid and increase the focal length of the light-receiving component;

    The light output distance of the light receiving component is less than the focal length of the light receiving component, and the current optical power value is less than the preset optical power lower limit value, the controller adjusts the power supply current of the temperature adjustment device , to reduce the temperature of the liquid and reduce the focal length of the light receiving member.
12. According to the optical module according to claim 11, according to the comparison between the light emitting distance of the light receiving component and the focal length of the light receiving component, the current optical power value and the preset optical power upper limit value, optical power The comparison of the lower limit value, adjusting the temperature of the temperature regulating device, also includes:

    The light output distance of the light receiving component is greater than the focal length of the light receiving component, and the current optical power value is greater than the preset optical power upper limit value, the controller adjusts the power supply current of the temperature adjustment device , to reduce the temperature of the liquid and reduce the focal length of the light-receiving component;

    The light output distance of the light receiving component is greater than the focal length of the light receiving component, and the current optical power value is less than the preset optical power lower limit value, the controller adjusts the power supply current of the temperature adjustment device , to increase the temperature of the liquid and increase the focal length of the light receiving member.
13. According to the optical module according to claim 9, the light receiving part further comprises:

    A tube base, the photoelectric detection chip is arranged on the tube base;

    a tube cap, the cover is set above the tube base, and the converging lens is set on the tube cap;

    The liquid support is arranged above the tube cap, and the lower surface of the liquid support is in sealing connection with the upper surface of the tube cap.
14. According to the optical module according to claim 13, a temperature control platform is provided on the side of the liquid support for carrying the temperature adjustment device.
15. According to the optical module according to claim 9, the flat window light-transmitting plate, the converging lens and the photodetection chip are arranged coaxially; there is no air bubble between the flat window light-transmitting plate and the liquid.
16. According to the optical module according to claim 9, the transmittance of the light-transmitting liquid is greater than or equal to 95%.
17. According to the optical module according to claim 9, the upper surface of the liquid is higher than the upper surface of the converging lens.
18. The optical module according to claim 13, further comprising:

    circuit board;

    The light-receiving component further includes: pins passing through the stem and protruding from the upper surface of the stem;

    The pins are also connected to the circuit board;

    The controller is arranged on the circuit board.

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