WO2022100278A1 - Module optique - Google Patents

Module optique Download PDF

Info

Publication number
WO2022100278A1
WO2022100278A1 PCT/CN2021/118902 CN2021118902W WO2022100278A1 WO 2022100278 A1 WO2022100278 A1 WO 2022100278A1 CN 2021118902 W CN2021118902 W CN 2021118902W WO 2022100278 A1 WO2022100278 A1 WO 2022100278A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
wavelength
polarization state
polarization
optical
Prior art date
Application number
PCT/CN2021/118902
Other languages
English (en)
Chinese (zh)
Inventor
濮宏图
慕建伟
薛登山
吴涛
Original Assignee
青岛海信宽带多媒体技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202011251595.XA external-priority patent/CN114488425B/zh
Priority claimed from CN202011256470.6A external-priority patent/CN114488426A/zh
Application filed by 青岛海信宽带多媒体技术有限公司 filed Critical 青岛海信宽带多媒体技术有限公司
Publication of WO2022100278A1 publication Critical patent/WO2022100278A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters

Definitions

  • the present disclosure relates to the technical field of optical communication, and in particular, to an optical module.
  • Optical communication technology will be used in new business and application modes such as cloud computing, mobile Internet, and video.
  • the optical module realizes the function of photoelectric conversion in the field of optical communication technology, and is one of the key components in optical communication equipment.
  • the optical signal intensity input by the optical module to the external optical fiber directly affects the quality of optical fiber communication.
  • embodiments of the present disclosure provide an optical module, including a circuit board; a first laser chip, electrically connected to the circuit board, and configured to emit light of a first wavelength and a second wavelength; a first filter, is configured to receive the light emitted by the first laser chip, reflect the light of the first wavelength, and transmit the light of the second wavelength; the second laser chip, electrically connected to the circuit board, is configured to emit the light of the second wavelength.
  • a second filter configured to receive the light emitted by the second laser chip, reflect the light of the second wavelength, and transmit the light of the first wavelength
  • a multiplexing component configured to receive light of a first wavelength reflected from the first filter, receive light of a second wavelength reflected from the second filter, and combine the received light of the first wavelength and the light of the second wavelength are combined into one beam.
  • the present disclosure provides an optical module, comprising: a circuit board; an optical emission sub-module electrically connected to the circuit board for outputting signal light; wherein the optical emission sub-module includes: a first laser The chip is used to generate the first wavelength signal light, and the first laser chip generates the second wavelength light when it is turned off and on; the first polarization beam splitter is arranged on the output optical path of the first laser chip, using for transmitting the signal light of the first wavelength and the light of the second wavelength according to the polarization state of the signal light of the first wavelength and the light of the second wavelength; a first polarization state conversion device and a first narrow-band filter, are sequentially arranged on the transmission light path of the first polarization beam splitter, the first narrowband filter is used for transmitting the second wavelength light and for reflecting the first wavelength signal light, the first polarization state The conversion device is used to change the polarization state of the first wavelength signal light; the polarization state conversion device is arranged on the reflected light path of the
  • the present disclosure provides an optical module, comprising: a circuit board; a light emission sub-module electrically connected to the circuit board for outputting signal light; wherein the light emission sub-module includes: a first laser chip , used to generate the first wavelength signal light, the first laser chip generates the second wavelength light when it is turned off and on; the first polarization beam splitter is arranged on the output optical path of the first laser chip, used for The signal light of the first wavelength and the light of the second wavelength are transmitted according to the polarization state of the signal light of the first wavelength and the light of the second wavelength; the first polarization state conversion device and the first narrowband filter are sequentially arranged on the transmission light path of the first polarization beam splitter, the first narrowband filter is used for transmitting the second wavelength light and for reflecting the first wavelength signal light, and the first polarization state is converted The device is used to change the polarization state of the first wavelength signal light; the second laser chip is used to generate the second wavelength signal light, and the second laser chip generate
  • a second polarization state conversion device and a second narrow-band filter are sequentially arranged on the reflected light path of the second polarization beam splitter, and the second narrow-band filter is used to transmit the first
  • a wavelength of light is used to reflect the second wavelength of signal light
  • the second polarization state conversion device is used to change the polarization state of the second wavelength of signal light.
  • the present disclosure provides an optical module, comprising: a circuit board; an optical emission sub-module electrically connected to the circuit board for outputting signal light; wherein the optical emission sub-module includes: a first laser The chip is used to generate the signal light of the first wavelength, and the first laser chip generates the light of the second wavelength when it is turned off and on; the second laser chip is used to generate the signal light of the second wavelength, and the second laser chip is in the A first wavelength light is generated when turned off and on; a polarization beam splitter assembly includes a first input end, a second input end, a polarization beam splitter, a polarization state conversion device, a first output end, a second output end and a third output end, the first input end is optically connected to the first laser chip, and the polarization state conversion device and the polarization beam splitter are combined for the first wavelength signal light and the second wavelength light and the Separation of the second wavelength signal light and the first wavelength light transmission optical path, so that the first output end
  • FIG. 1 is a connection diagram of an optical communication system according to some embodiments
  • FIG. 2 is a structural diagram of an optical network terminal according to some embodiments.
  • FIG. 3 is a structural diagram of an optical module according to some embodiments.
  • FIG. 5 is a cross-sectional view of an optical module structure according to some embodiments.
  • FIG. 6 is a schematic diagram of an assembly structure of an optical emission sub-module and an optical fiber socket according to some embodiments
  • FIG. 7 is an exploded view of a light emission sub-module structure according to some embodiments.
  • FIG. 8 is a schematic structural diagram of a light emission sub-module according to some embodiments.
  • FIG. 9 is a schematic structural diagram of another light emitting sub-module according to some embodiments.
  • optical communication technology light is used to carry the information to be transmitted, and the optical signal carrying the information is transmitted to information processing equipment such as computers through information transmission equipment such as optical fibers or optical waveguides to complete the transmission of information. Since optical signals have passive transmission characteristics when transmitted through optical fibers or optical waveguides, low-cost and low-loss information transmission can be achieved.
  • 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 fibers or optical waveguides through the optical port, and realizes electrical connection with an optical network terminal (for example, an optical cat) through the electrical port. It is mainly used to realize power supply, I2C signal transmission, data signal transmission and grounding; optical network terminals transmit electrical signals to information processing equipment such as computers through network cables or wireless fidelity technology (Wi-Fi).
  • Wi-Fi wireless fidelity technology
  • FIG. 1 is a connection diagram of an optical communication system according to some embodiments.
  • 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;
  • 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 .
  • the 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 several kilometers, tens of kilometers or hundreds of kilometers.
  • the local information processing device 2000 may be any one or more of the following devices: a router, a switch, a computer, a mobile phone, a tablet computer, a television, and the like.
  • 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 and the optical fiber 101 can establish a two-way optical signal connection; electrical signal connection.
  • the optical module 200 realizes the mutual conversion of optical signals and electrical signals, so as to establish a connection between the optical fiber 101 and the optical network terminal 100 .
  • the optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input into the optical network terminal 100
  • the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input into the optical fiber 101 .
  • the optical network terminal 100 includes a substantially rectangular 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 can 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 are connected.
  • a connection is established between the optical module 200 and the network cable 103 through the optical network terminal 100 .
  • 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.
  • the optical network terminal 100 as the host computer of the optical module 200, can monitor the optical module 200. work.
  • the host computer of the optical module 200 may also include an optical line terminal (Optical Line Terminal, OLT) and the like.
  • OLT Optical Line Terminal
  • a bidirectional signal transmission channel is established between the remote server 1000 and 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.
  • the optical network terminal 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on the surface of the PCB circuit board 105 , and an electrical connector disposed inside the cage 106 .
  • the electrical connector is configured to be connected to the electrical port of the optical module 200 ; the heat sink 107 has protrusions such as fins 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 electrical port of the optical module 200 is connected to the electrical connector inside the cage 106 , so that the optical module 200 and the optical network terminal 100 establish a bidirectional electrical signal connection.
  • 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
  • FIG. 4 is an exploded structural diagram of an optical module according to some embodiments.
  • the optical module 200 includes a housing, a circuit board 300 disposed in the housing, and an optical sub-module;
  • 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 generally presents a square body.
  • the lower casing 202 includes a bottom plate and two lower side plates located on both sides of the bottom plate and perpendicular to the bottom plate;
  • the upper casing 201 includes a cover plate, and two side plates located on both sides of the cover plate and perpendicular to the cover plate.
  • An upper side plate is combined with the two side plates by two side walls, so as to realize that the upper casing 201 is covered on the lower casing 202 .
  • the direction of the connection between the two openings 204 and 205 may be consistent with the length direction of the optical module 200 , or may be inconsistent with the length direction of the optical module 200 .
  • the opening 204 is located at the end of the light module 200 (the left end of FIG. 3 ), and the opening 205 is also located at the end of the light module 200 (the right end of FIG. 3 ).
  • the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200.
  • the opening 204 is an electrical port, and the golden fingers of the circuit board 300 protrude from the electrical port 204 and are inserted into the host computer (such as the optical network terminal 100 );
  • the optical fiber 101 is connected to the optical sub-module inside the optical module 200 .
  • the combination of the upper casing 201 and the lower casing 202 is used to facilitate the installation of components such as the circuit board 300 and the optical sub-module into the casing.
  • the upper casing 201 and the lower casing 202 can form encapsulation protection for these components.
  • the upper casing 201 and the lower casing 202 are generally made of metal material, which is beneficial to achieve electromagnetic shielding and heat dissipation.
  • the optical module 200 further includes an unlocking component 203 located on the outer wall of the housing thereof, and the unlocking component 203 is configured to realize a fixed connection between the optical module 200 and the upper computer, or release the connection between the optical module 200 and the upper computer fixed connection.
  • the unlocking components 203 are located on the outer walls of the two lower side panels 2022 of the lower casing 202, and include engaging components matching with the cage of the upper computer (eg, the cage 106 of the optical network terminal 100).
  • the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper 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 The connection relationship between the engaging member and the host computer is used to release the engaging 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 chip, limiter amplifier chip, clock data recovery CDR, power management chip, data processing chip DSP) Wait.
  • electronic components such as capacitors, resistors, triodes, MOS tubes
  • chips such as MCU, laser driver chip, limiter amplifier chip, clock data recovery CDR, power management chip, data processing chip 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 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. For example, the rigid circuit board can carry chips smoothly; the rigid circuit board can also be inserted into the electrical connector in the upper computer cage. , in some embodiments of the present disclosure, metal pins/gold fingers are formed on one end surface of the rigid circuit board for connecting with the electrical connector; these are inconvenient to be realized by the flexible circuit board.
  • Flexible circuit boards are also used in some optical modules; flexible circuit boards are generally used in conjunction with rigid circuit boards.
  • a flexible circuit board can be used to connect the rigid circuit board and the optical sub-module as a supplement to the rigid circuit board.
  • the optical module further includes an optical transmitting sub-module and an optical receiving sub-module, and the optical transmitting sub-module and the optical receiving sub-module may be collectively referred to as an optical sub-module.
  • the optical module provided by the embodiment of the present disclosure includes an optical transmitting sub-module 400 and an optical receiving sub-module 500 , the optical transmitting sub-module 400 is located at the edge of the circuit board 300 , and the optical transmitting sub-module 400 and the optical receiving sub-module 500
  • the staggered arrangement on the surface of the circuit board 300 is beneficial to achieve better electromagnetic shielding effect.
  • the light emitting sub-module 400 is disposed on the surface of the circuit board 300. In another common packaging method, the light emitting sub-module is physically separated from the circuit board and electrically connected through a flexible board. In the embodiment of the present disclosure, the light emitting sub-module 400 is connected to the first optical fiber socket 502 through the first optical fiber 501 .
  • the light emitting sub-module 400 is located in the enclosing cavity formed by the upper and lower casings.
  • the circuit board 300 is provided with a notch 301 for placing the light emitting sub-module; the notch 301 can be arranged in the middle of the circuit board or at the edge of the circuit board; the light emitting sub-module is embedded in a way It is arranged in the notch 301 of the circuit board, so that the circuit board can extend into the inside of the light emitting sub-module, and it is also convenient to fix the light emitting sub-module and the circuit board together.
  • the light emitting sub-module 400 may be fixedly supported by the lower case 202 .
  • the light receiving sub-module 500 is disposed on the surface of the circuit board 300. In another common packaging method, the light receiving sub-module is physically separated from the circuit board and electrically connected through a flexible board. In the embodiment of the present disclosure, the light receiving sub-module 500 is connected to the second optical fiber socket 504 through the second optical fiber 503 . The signal light outside the optical module is transmitted to the second optical fiber socket 504 through the external optical fiber and transmitted to the second optical fiber 503, and then transmitted to the light receiving sub-module 500 through the second optical fiber 503, and the receiving sub-module 500 converts the received signal light into electric current Signal.
  • the light receiving sub-module 500 includes an optical device and an optoelectronic replacement device.
  • the optical device may be an optical fiber adapter, an arrayed waveguide grating, a lens, and the like.
  • the second optical fiber 503 transmits the signal light to the optical device, and then converts the transmission path of the signal light beam to the optical device, and finally transmits it to the optoelectronic replacement device.
  • FIG. 5 is a cross-sectional view of an optical module structure according to some embodiments.
  • the optical module provided by the embodiment of the present disclosure includes a lower casing 202 , a circuit board 300 , a light emitting sub-module 400 and an optical receiving sub-module 500 .
  • the light-emitting sub-module 400 and the light-receiving sub-module 500 are located on the circuit board 300 .
  • the first optical fiber socket 502 is connected to the light emitting sub-module 400 through the first optical fiber 501
  • the second optical fiber socket 504 is connected to the optical receiving sub-module 500 through the second optical fiber 503 .
  • the following description will be given by taking the connection between the first optical fiber socket 502 and the light emitting sub-module 400 through the first optical fiber 501 as an example.
  • the lower casing 202 is used for carrying the circuit board 300 and the second optical fiber socket 502 , and the circuit board 300 carries the light emitting sub-module 400 .
  • the lower case 202 has a card slot 206 with a gap 206 a in the card slot 206 , and the card slot 206 may be formed by a surface of the lower case protruding upward.
  • the first optical fiber socket 502 includes a main body 502a and a protrusion 502b, and the protrusion 502b is located on the surface of the main body 502a.
  • the first optical fiber socket 502 is assembled and fixed with the slot 206 on the lower casing 202 .
  • the optical fiber socket is fixed on the lower housing.
  • the card slot 206 divides the lower casing into two areas, the circuit board 300 is arranged in one of the areas, and a convex column is formed on the surface of the lower casing in this area to fix the circuit board 300 ; the light emitting sub-module 400 is fixed to the circuit board 300 Together, by fixing the circuit board 300, the light emitting sub-module is fixed on the lower casing.
  • the light emitting sub-module can also be directly fixed on the lower casing, and does not need to be indirectly fixed through the circuit board 300 .
  • the optical fiber socket is arranged in the other area, and the external optical fiber plug extends into the other area to be butted with the optical fiber socket. Therefore, the circuit board 300 and the optical fiber socket are respectively fixed on the lower casing, that is, the positions of the optical emitting sub-module 400 and the optical fiber socket 502 are relatively fixed. Therefore, the optical fiber 501a connecting the optical emitting sub-module and the optical fiber socket needs to have a specific size .
  • FIG. 6 is a schematic diagram of an assembly structure of a light emitting sub-module and an optical fiber socket according to some embodiments.
  • the optical emitting sub-module 400 is connected to the first optical fiber socket 502 through the optical fiber adapter 600 and the first optical fiber 501 in sequence.
  • One end of the first optical fiber 501 is connected to the optical fiber adapter 600 , and the other end is connected to the first optical fiber socket 502 .
  • the optical fiber adapter 600 is used to be inserted into the optical emission sub-module to receive the light converged by the optical lens; the first optical fiber socket 502 is respectively connected with the first optical fiber 501 and the optical fiber plug outside the optical module, and is used to realize the internal and external optical modules of the optical module.
  • the light of the optical transmission sub-module is connected to the optical fiber through the optical fiber adapter, and is transmitted from the optical fiber to the first optical fiber socket 502, and then transmitted to the outside of the optical module through the first optical fiber socket 502.
  • FIG. 7 is an exploded view of the structure of a light emitting sub-module according to some embodiments.
  • the light emitting sub-module provided by the embodiment of the present disclosure is provided with a laser component 404
  • the laser component 404 includes a laser chip 404 a , a collimating lens 404 b , a metallized ceramic 404 c and a semiconductor refrigerator 404 d .
  • the common light emitting chip of the optical module is a laser chip.
  • the laser chip 404a is arranged on the surface of the metallized ceramic 404c.
  • the surface of the metallized ceramic 404c forms a circuit pattern, which can supply power to the laser chip; at the same time, the metallized ceramic 404C has better thermal conductivity. , which can be used as a heat sink for the laser chip 404a to dissipate heat.
  • Laser has become the preferred light source for optical modules and even optical fiber transmission due to its better single-wavelength characteristics and better wavelength tuning characteristics; other types of light, such as LED light, are generally not used in common optical communication systems, even if special optical communication systems.
  • This kind of light source is used in the light source, and the characteristics and chip structure of the light source are quite different from those of the laser, so that there is a big technical difference between the optical module using the laser and the optical module using other light sources.
  • Those skilled in the art generally do not think that These two types of optical modules can give technical inspiration to each other.
  • the function of the optical lens is to condense light, and the light emitted from the light emitting chip is in a divergent state. In order to facilitate the subsequent optical path design and light coupling into the optical fiber, it needs to be converged. Common convergence converges divergent light into parallel light, and converges divergent light and parallel light into convergent light.
  • Fig. 7 shows a collimating lens 404b and a focusing lens 407.
  • the collimating lens 404b is arranged on the light exit light path of the laser chip to condense the divergent light of the laser chip into parallel light; the focusing lens 407 is arranged close to the optical fiber On the side of the adapter 600 , the parallel light is collected into the optical fiber adapter 600 .
  • a semiconductor cooler TEC 404d is also included in the light emitting sub-module.
  • the TEC404d is directly or indirectly arranged on the bottom surface of the light emitting sub-module cavity, and the metallized ceramic is arranged on the surface of the TEC404d.
  • the TEC404d is used to balance the heat to maintain the set operating temperature of the laser chip.
  • the light emitting sub-module has a packaging structure to encapsulate the laser chips.
  • the existing packaging structures include coaxial packaging TO-CAN, silicon optical packaging, chip-on-board lens assembly packaging COB-LENS, and micro-optic XMD packaging.
  • the package is also divided into airtight packaging and non-airtight packaging. On the one hand, the package provides a stable and reliable working environment for the laser chip, and on the other hand, it forms the external electrical connection and light output.
  • the optical module will use different packages to make the light emitting sub-module.
  • the laser chip has vertical cavity surface light emission and edge light emission.
  • the difference in the light output direction of the laser chip will also affect the choice of packaging form.
  • the light emission sub-module 400 provided by the embodiment of the present disclosure further includes a cover plate 401 and a light emission sub-module cavity (hereinafter referred to as the cavity) 402 , and the cover plate 401 covers the cavity from above.
  • a side wall of the cavity 402 has an opening 403 for inserting the circuit board 300, and the circuit board 300 is fixed to the lower casing of the optical module.
  • a laser assembly 404 is provided in the cavity 402, and the circuit board 300 extending into the cavity is electrically connected to the laser assembly 404.
  • the laser assembly has a laser chip, and may also include components such as a collimating lens to form collimated light output.
  • the cavity 402 is provided with an optical multiplexing component, and the light from the laser component 404 is combined into a beam of light through the optical multiplexing component, so that the beam of light includes light of different wavelengths.
  • the other side wall of the cavity 402 has a through hole 406 , and a beam of light combined by the optical multiplexing component is injected into the through hole 406 .
  • a focusing lens 407 can also be arranged between the through hole 406 and the light multiplexing component, and the light is collected by the focusing lens so as to facilitate subsequent coupling of the light.
  • the fiber optic adapter 600 extends into the through hole 406 to couple and receive the light from the optical multiplexing component, the tail of the fiber optic adapter is connected to the first fiber socket 502 through the first optical fiber 501, and the light received by the fiber optic adapter 600 is transmitted to the first fiber through the first optical fiber 501.
  • a fiber optic socket 502 A fiber optic socket 502 .
  • any laser chip is turned on or off, light of non-operating wavelength will be generated, and when the light of non-operating wavelength is the same as the signal light of operating wavelength generated by other laser chips, the laser chip will generate light of non-operating wavelength.
  • the resulting signal light produces chirped crosstalk.
  • a filter and a second filter, etc., the multiplexing component, the first filter and the second filter are arranged in the cavity 402 .
  • the band-pass filtering effect of the first filter and the second filter is used to realize that the light of the working wavelength and the light of the non-working wavelength are directed in different directions;
  • the light of the working wavelength is combined, so that the light of the non-working wavelength is filtered out of the final output light, and a single beam is output.
  • the optical module provided by the embodiment of the present disclosure includes a first laser chip, which is electrically connected to the circuit board and capable of emitting light of a first wavelength and a second wavelength; a first filter, which receives the light emitted by the first laser chip , which can reflect the light of the first wavelength and transmit the light of the second wavelength; the second laser chip, which is electrically connected to the circuit board, can emit light of the first wavelength and the second wavelength; The second filter, which receives the light emitted by the second laser chip, can reflect the light of the second wavelength and transmit the light of the first wavelength; The light of one wavelength is received by the light of the second wavelength reflected from the second filter, and the received light of the first wavelength and the light of the second wavelength are combined into one beam.
  • the first wavelength is the working wavelength of the first laser chip; the second wavelength is the working wavelength of the second laser chip, and the light emitted by the first laser chip and the second laser chip have overlapping wavelengths.
  • the wave combining component realizes the beam combining of light by utilizing the polarization principle of light, and includes a first polarizer, one side of the first polarizer can receive the light of the first wavelength and the first polarization state; the other side of the first polarizer One side can receive the light of the second wavelength and the second polarization state; the first polarizer can transmit the light of the first polarization state and can reflect the light of the second polarization state, so as to realize the light of the first wavelength and the light of the second polarization state.
  • the photosynthetic beam of the second wavelength is a first polarizer, one side of the first polarizer can receive the light of the first wavelength and the first polarization state; the other side of the first polarizer One side can receive the light of the second wavelength and the second polarization state; the first polarizer can transmit the light of the first polarization state and can reflect the light of the second polarization state, so as to realize the light of the first wavelength and the light of the second polarization state
  • Lights of different polarization states can be obtained by using a polarization state changing device.
  • the polarization state of the light will change regularly.
  • the polarization state of the light after the device is changed by the polarization state can be known.
  • the light emitted by the first laser chip and the second laser chip can be in the same polarization state or in different polarization states; when the light emitted by the first laser chip and the second laser chip has the same polarization state, they pass through the first polarization state respectively.
  • the multiplexing component After changing the device and the second polarization state changing device, the polarization states of the two beams of light are still the same, and the different polarization states cannot be used for multiplexing, so the multiplexing component also includes a third polarization state changing device, which is different from the first polarization state changing device.
  • the polarization state of the light from the first laser chip is changed again to obtain light with two different polarization states, and then the different polarization states can be used to combine waves.
  • the light emitted by the first laser chip and the second laser chip can be in different polarization states. After passing through the first polarization state changing device and the second polarization state changing device respectively, the polarization states of the two beams of light are still different. The difference of the state can be combined without using a third polarization state to change the device.
  • FIG. 8 is a schematic structural diagram of a light emitting sub-module according to some embodiments.
  • the light emission sub-module provided by the embodiment of the present disclosure includes a first laser chip 404a1 and a second laser chip 404a2 , and also includes a beam splitting component 405 , a first filter 4054 and a second filter 4057 .
  • the first laser chip 404a1 works normally, it generates the first wavelength signal light, which is denoted as the first wavelength signal light ⁇ 1
  • the first laser chip 404a1 generates the second wavelength light when it is turned off and on, which is denoted as the second wavelength light.
  • the second laser chip 404a2 when the second laser chip 404a2 works normally, it generates the second wavelength signal light, which is denoted as the second wavelength signal light ⁇ 2, and the first laser chip 404a1 generates the first wavelength light when it is turned off and on, which is denoted as the first wavelength light. ⁇ 1.
  • the first filter 4054 is used to filter out the second wavelength light ⁇ 2
  • the second filter 4057 is used to filter out the first wavelength light ⁇ 1
  • the beam splitting component 405, the first filter 4054 and the second filter 4057 are combined,
  • the first laser chip 404a1 generates the second wavelength light ⁇ 2 when the first laser chip 404a1 is turned off and on and is leaked through the first filter 4054 and does not produce crosstalk to the second wavelength signal light ⁇ 2 when the second laser chip 404a2 operates
  • the second laser chip 404a2 is turned off and on
  • the first wavelength light ⁇ 1 is leaked out through the second filter 4057 and will not cause crosstalk to the first wavelength signal light ⁇ 1 when the first laser chip 404a1 is working, thereby avoiding the optical module
  • the laser chip 404a is turned on or off, chirp crosstalk occurs between the laser chips 404a
  • the beam splitting assembly 405 includes a first polarization beam splitter 4051, a third polarization state changing device 4052, a first polarization state changing device 4053, a second polarization beam splitter 4055, and a second polarization state changing device 4056, the third polarization state changing device 4052, the first polarization state changing device 4053 and the second polarization state changing device 4056 cooperate with the multiplexing component to realize the optical path.
  • the first polarization beam splitter 4051 is arranged on the output optical path of the first laser chip 404a1; the first polarization state changing device 4053 and the first filter 4054 are arranged in sequence on the first polarization the transmission light path of the beam splitter 4051; the third polarization state changing device 4052 is arranged on the reflected light path of the first polarization beam splitter 4051; the second polarization beam splitter 4055 is arranged on the output light path of the second laser chip 404a2, and
  • the reflection light path of the second polarization beam splitter 4055 reflects the signal light of the designated working wavelength of the second laser chip 404a2 and transmits the signal light of the designated working wavelength of the first laser chip 404a1; the second polarization state changing device 4056 and the second filter 4057 are in sequence It is arranged on the transmission light path of the second polarizing beam splitter 4055 .
  • the light generated when the first laser chip 404a1 is turned off, turned on and in normal operation is linearly polarized light, and the polarization direction is parallel to the paper surface (two-way arrow in the figure); the second laser chip 404a2 is turned off and on And the light generated during normal operation is linearly polarized light, and the polarization direction is parallel to the paper surface (two-way arrow in the figure).
  • the first wavelength signal light ⁇ 1 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1, passes through the first polarization beam splitter 4051, and is then transmitted to the first polarization beam splitter 4051 along the transmission optical path of the first polarization beam splitter 4051.
  • a polarization state changing device 4053 is transmitted to the first filter 4054 through the first polarization state changing device 4053; since the first filter 4054 is used to filter out the second wavelength light ⁇ 2, the first wavelength signal light ⁇ 1 is filtered by the first filter
  • the sheet 4054 is reflected back to the first polarization state changing device 4053, the first wavelength signal light ⁇ 1 passes through the first polarization state changing device 4053 again and is re-incident to the first polarization beam splitter 4051, and the first wavelength signal light ⁇ 1 transmits the first Compared with the first wavelength signal light passing through the first polarization state changing device for the first time, the polarization state of the polarization state changing device 4053 is rotated by 90°, that is, the polarization direction is perpendicular to the paper surface (in the figure), and then re-incident to the first wavelength signal light.
  • the first wavelength signal light ⁇ 1 of the polarization beam splitter 4051 will be transmitted along the reflected light path of the first polarization beam splitter 4051, and will be transmitted to the third polarization state changing device 4052 along the reflected light path of the first polarization beam splitter 4051.
  • the polarization state changing device 4052 changes the polarization direction by 90° again, and the polarization direction is parallel to the paper plane, and then enters the second polarization beam splitter 4055, and finally transmits the second polarization beam splitter 4055 and reflects along the second polarization beam splitter 4055.
  • Optical output Optical output.
  • the second wavelength light ⁇ 2 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1, and transmitted to the first polarization state changing device 4053 along the transmission optical path of the first polarization beam splitter 4051, and then transmits out the first polarization state changing device 4053.
  • a filter 4054 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1, and transmitted to the first polarization state changing device 4053 along the transmission optical path of the first polarization beam splitter 4051, and then transmits out the first polarization state changing device 4053.
  • the first polarization beam splitter 4051 combines the first polarization state changing device 4053 and the first filter 4054 to separate the transmission optical paths of the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2, so that the second wavelength light ⁇ 2 does not transmit along the optical path of the first wavelength signal light ⁇ 1, so the second wavelength light ⁇ 2 will not enter the output optical path of the optical emitting sub-module, and thus the second wavelength light ⁇ 2 will not cause crosstalk to the second wavelength signal light ⁇ 2.
  • the second wavelength signal light ⁇ 2 is incident on the second polarization beam splitter 4055 along the output optical path of the second laser chip 404a2, and then transmitted to the second polarization state changing device 4056 along the transmission optical path of the second polarization beam splitter 4055, and then passes through the second polarization state changing device 4056.
  • the polarization state changing device 4056 is transmitted to the second filter 4057; since the second filter 4057 is used to filter out the first wavelength light ⁇ 1, the second wavelength signal light ⁇ 2 is reflected back to the second polarization state changing device by the second filter 4057 4056, the second wavelength signal light ⁇ 2 is re-incident to the second polarization beam splitter 4055 through the second polarization state changing device again, and the second wavelength signal light ⁇ 2 is transmitted through the second polarization state changing device 4056 twice before and after compared to the first time.
  • the polarization direction of the second wavelength signal light passing through the second polarization state changing device 4056 is rotated by 90°, that is, the polarization direction is perpendicular to the paper surface, and then the second wavelength signal light re-incident to the second polarization beam splitter 4055 along the second
  • the reflected light path of the polarization beam splitter 4055 is transmitted and output.
  • the first wavelength light ⁇ 1 is incident on the second polarization beam splitter 4055 along the output optical path of the second laser chip 404a2, and transmitted to the second polarization state changing device 4056 along the transmission optical path of the second polarization beam splitter 4055, and then transmits out the second polarization state changing device 4056.
  • Second filter 4057 Second filter 4057.
  • the second polarization beam splitter 4055 combines the second polarization state changing device 4056 and the second filter 4057 to realize the separation of the transmission of the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1, so that the first wavelength light ⁇ 1 It does not transmit along the optical path of the second wavelength signal light ⁇ 2, so the first wavelength light ⁇ 1 will not enter the output optical path of the light emitting sub-module, and thus the first wavelength light ⁇ 1 will not cause crosstalk to the first wavelength signal light ⁇ 1.
  • the first polarization beam splitter 4051 includes a second polarizer 0511 and a second polarization beam splitter prism 0512; a first polarization state changing device 4053 and a first filter 4054 are sequentially arranged on the transmitted light path of the second polarizer 0511;
  • the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 are incident on the second polarizer 0511 along the output optical path of the first laser chip 404a1, since the polarization directions of the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 are parallel to the paper surface , and then transmitted to the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 on the polarization beam splitting dielectric film of the second polarizer 0511 through the polarization beam splitting dielectric film; reflected by the first filter 4054 again and transmitted through the first Since the polarization direction of the first wavelength signal light ⁇ 1 of the polarization state changing device 4053 has changed,
  • the polarizing beam splitting dielectric film of 0511 is reflected and transmitted to the second polarizing beam splitting prism 0512; when transmitted to the polarizing beam splitting dielectric film of the second polarizing beam splitting prism 0512, since the polarization direction is perpendicular to the paper surface, the first wavelength signal light ⁇ 1 will be reflected by the polarizing beam splitting dielectric film of the second polarizing beam splitting prism 0512, and then transmitted to the third polarization state changing device 4052;
  • a first reflective surface 0512A can also be set between the second polarizer and the first polarizer to replace the polarizing beam splitting dielectric film, which can reflect the light of the second polarizer toward the first polarizer;
  • the first reflective surface may be disposed between the second polarizer and the third polarization state changing device, or between the first polarizer and the third polarization state changing device between devices.
  • the second polarization beam splitter 4055 includes a third polarizer 0551; the second polarization state changing device 4056 and the second filter 4057 are sequentially arranged on the third polarizer 0551 on the transmitted light path; the first polarizer 0552 is arranged on the output light path of the third polarization state changing device 4052.
  • the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1 are incident on the third polarizer 0551 along the output optical path of the second laser chip 404a2, since the polarization directions of the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1 are both parallel to the paper surface , and then transmitted to the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1 on the polarization beam splitting dielectric film of the third polarizer 0551 through the polarization beam splitting dielectric film; reflected by the second filter 4056 and transmitted through the second
  • the second wavelength signal light ⁇ 2 of the polarization state changing device 4056 has been changed due to the polarization direction, and the polarization direction is perpendicular to the paper surface.
  • the polarizing beam splitting dielectric film of 0551 is reflected and transmitted to the first polarizer 0552; when transmitted to the polarizing beam splitting dielectric film of the first polarizer 0552, since the polarization direction is perpendicular to the paper surface, the second wavelength signal light ⁇ 2 will be transmitted by the first polarizer 0552.
  • the polarizing beam splitting dielectric film of a polarizer 0552 is reflected, and then output from the first polarizer 0552. And the polarization direction of the first wavelength signal light ⁇ 1 transmitted by the third polarization state changing device 4052 is deflected by 90°, and the polarization direction is perpendicular to the paper.
  • the first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 are combined, and the second wavelength light ⁇ 2 and the first wavelength light ⁇ 1 will not be doped, so as not to cause the first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 is cross-talked by the first wavelength light ⁇ 1 and the second wavelength light ⁇ 2.
  • the light emission sub-module 400 provided by the embodiments of the present disclosure further includes a Faraday rotator 4058 .
  • the Faraday rotator 4057 is arranged at the output end of the reflected light path of the second polarization beam splitter 4055, and the Faraday rotator 4058 has the function of optical isolation.
  • the first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 when the polarization directions of the first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 are changed after passing through the Faraday rotator 4057 and are reflected back to the Faraday rotator 4057, the first wavelength signal light The polarization directions of the light ⁇ 1 and the second wavelength signal light ⁇ 2 will be changed again to effectively prevent the first wavelength signal light ⁇ 1 from returning to the first laser chip 404a1 and the second wavelength signal light ⁇ 2 returning to the second laser chip in the same way. 404a2.
  • the positions of the first laser chip 404a1 and the second laser chip 404a2 are only an example, and the positions of the first laser chip 404a1 and the second laser chip 404a2 are not limited to those shown in the figure.
  • the structure shown in 8 can also be transformed into other forms or structures.
  • FIG. 9 is a schematic structural diagram of another light emitting sub-module according to some embodiments.
  • the first laser chip 404a1 and the second laser chip 404a2 of the light emitting sub-module further include a beam splitting component 405 and a first filter. 4054 and a second filter 4057.
  • the beam splitting component 405 includes a first polarization beam splitter 4051, a third polarization state changing device 4052, a first polarization state changing device 4053, a second polarization beam splitter 4055 and a second polarization state changing device 4056, the third polarization state changing device 4052, the first polarization state changing device 4053, and the second polarization state changing device 4056 are used as a multiplexing component.
  • the first polarization beam splitter 4051 is arranged on the output optical path of the first laser chip 404a1; the first polarization state changing device 4053 and the first filter 4054 are arranged in sequence on the first polarization The transmission light path of the beam splitter 4051; the third polarization state changing device 4052 is arranged on the output light path of the second laser chip 404a2; the second polarization beam splitter 4055 is arranged on the output light path of the third polarization state changing device 4052, and The second polarization beam splitter 4055 is arranged on the reflected light path of the first polarization beam splitter 4051 ; the second polarization state changing device 4056 and the second filter 4057 are sequentially arranged on the reflected light path of the first polarization beam splitter 4051 .
  • the first wavelength signal light ⁇ 1 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1 , passes through the first polarization beam splitter 4051 , and then passes along the first polarization beam splitter 4051
  • the transmitted light path is transmitted to the first polarization state changing device 4053, and then transmitted to the first filter 4054 through the first polarization state changing device 4053; since the first filter 4054 is used to filter out the second wavelength light ⁇ 2, the first wavelength signal The light ⁇ 1 is reflected back to the first polarization state changing device 4053 by the first filter 4054, the first wavelength signal light ⁇ 1 passes through the first polarization state changing device 4053 again and is re-incident to the first polarization beam splitter 4051, and the first wavelength signal light ⁇ 1 Compared with the first wavelength signal light passing through the first polarization state changing device 4053 twice before and after, its polarization direction is rotated by 90°, that is, the polarization
  • the first wavelength signal light ⁇ 1 of the first polarization beam splitter 4051 will be transmitted along the reflection light path of the first polarization beam splitter 4051 , and will be transmitted and output along the reflection light path of the first polarization beam splitter 4051 .
  • the second wavelength light ⁇ 2 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1, and transmitted to the first polarization state changing device 4053 along the transmission optical path of the first polarization beam splitter 4051, and then transmits out the first polarization state changing device 4053.
  • a filter 4054 is incident on the first polarization beam splitter 4051 along the output optical path of the first laser chip 404a1, and transmitted to the first polarization state changing device 4053 along the transmission optical path of the first polarization beam splitter 4051, and then transmits out the first polarization state changing device 4053.
  • the first polarization beam splitter 4051 combines the first polarization state changing device 4053 and the first filter 4054 to separate the transmission optical paths of the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2, so that the second wavelength light ⁇ 2 does not transmit along the optical path of the first wavelength signal light ⁇ 1, so the second wavelength light ⁇ 2 will not enter the output optical path of the optical emitting sub-module, and thus the second wavelength light ⁇ 2 will not cause crosstalk to the second wavelength signal light ⁇ 2.
  • the second wavelength signal light ⁇ 2 is incident on the third polarization state changing device 4052 along the output optical path of the second laser chip 404a2, and the second wavelength signal light ⁇ 2 passes through the third polarization state changing device 4052 to change the polarization direction by 90°, that is, the second wavelength
  • the signal light ⁇ 2 passes through the third polarization state changing device 4052 and the polarization direction is converted to be perpendicular to the paper surface; the second wavelength signal light ⁇ 2 passing through the third polarization state changing device 4052 is incident on the second polarization beam splitter 4055 and along the second polarization beam splitter 4055.
  • the reflected light path of the polarization beam splitter 4055 is transmitted to the second polarization state changing device 4056, and then transmitted to the second filter 4057 through the second polarization state changing device 4056; since the second filter 4057 is used to filter out the first wavelength light ⁇ 1, Therefore, the second wavelength signal light ⁇ 2 is reflected back to the second polarization state changing device 4056 by the second filter 4057, and the second wavelength signal light ⁇ 2 passes through the second polarization state changing device again and is re-incident to the second polarization beam splitter 4055, before and after 2 Compared with the second wavelength signal light passing through the second polarization state changing device 4056 twice, the polarization direction of the second wavelength signal light passing through the second polarization state changing device 4056 for the first time is rotated by 90°, that is, the polarization direction is perpendicular to the paper.
  • the second wavelength signal light re-incident to the second polarization beam splitter 4055 is transmitted along the transmission light path of the second polarization beam splitter 4055 and transmitted to the first polarization beam splitter 4051, and finally along the first polarization beam splitter 4051 reflected light path output.
  • the first wavelength light ⁇ 1 is incident on the third polarization state changing device 4052 along the output optical path of the second laser chip 404a2, and the first wavelength light ⁇ 1 passes through the third polarization state changing device 4052 to change the polarization direction by 90°, that is, the first wavelength light ⁇ 1 passes through the third polarization state changing device 4052 and the polarization direction is converted to be perpendicular to the paper surface; the first wavelength light ⁇ 1 passing through the third polarization state changing device 4052 is incident on the second polarization beam splitter 4055 and splits along the second polarization
  • the reflected light path of the filter 4055 is transmitted to the second polarization state changing device 4056 , transmitted to the second filter 4057 through the second polarization state changing device 4056 , and then transmitted out of the second filter 4057 .
  • the second polarization beam splitter 4055 combines the third polarization state changing device 4052, the second polarization state changing device 4056, the second filter 4057 and the first polarization beam splitter 4051 to realize the second wavelength signal light ⁇ 2 It is separated from the transmission of the first wavelength light ⁇ 1, so that the first wavelength light ⁇ 1 does not transmit along the optical path of the second wavelength signal light ⁇ 2, so the first wavelength light ⁇ 1 will not enter the output optical path of the optical emission sub-module, and then the first wavelength light ⁇ 1. The light ⁇ 1 does not cause crosstalk to the first wavelength signal light ⁇ 1.
  • the second polarizer 0511 and the reflecting prism 0513 ; the first polarization state changing device 4053 and the first filter 4054 are sequentially arranged on the transmitted light of the second polarizer 0511 On the road; the reflective prism 0513 is arranged on the reflected light path of the second polarizer 0511.
  • the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 are incident on the second polarizer 0511 along the output optical path of the first laser chip 404a1, since the polarization directions of the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 are parallel to the paper surface , and then transmitted to the first wavelength signal light ⁇ 1 and the second wavelength light ⁇ 2 on the polarization beam splitting dielectric film of the second polarizer 0511 through the polarization beam splitting dielectric film; reflected by the first filter 4054 again and transmitted through the first Since the polarization direction of the first wavelength signal light ⁇ 1 of the polarization state changing device 4053 has changed, and the polarization direction is perpendicular to the paper surface, when it is transmitted to the polarization beam splitting dielectric film of the second polarizer 0511 again, it will be blocked by the second polarizer.
  • the polarization beam splitting dielectric film of 0511 is reflected and transmitted to the reflective prism 0513; when the first wavelength signal light ⁇ 1 is transmitted to the reflective film of the reflective prism 0513, it will be reflected and output by the reflective film of the reflective prism 0513.
  • the second polarization beam splitter 4055 includes a third polarizer 0551; On the reflected light path of the polarization beam splitter 4051 ; the second polarization state changing device 4056 and the second filter 4057 are sequentially arranged on the reflected light path of the third polarizer 0551 .
  • the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1 are incident on the third polarization state changing device 4052 along the output optical path of the second laser chip 404a2, and the third polarization state changing device 4052 changes the polarization direction and then enters the third polarizer 0551 , since the polarization directions of the second wavelength signal light ⁇ 2 and the first wavelength light ⁇ 1 are both perpendicular to the paper surface, the second wavelength signal light ⁇ 2 and the first wavelength light are transmitted to the second wavelength signal light ⁇ 2 and the first wavelength light on the polarization beam splitting dielectric film of the third polarizer 0551.
  • ⁇ 1 is reflected on the polarization beam splitting dielectric film of the third polarizer 0551, reflected by the second filter 4056 and transmitted through the second polarization state changing device 4056 again.
  • Parallel to the paper when transmitted to the polarizing beam splitting dielectric film of the third polarizer 0551 again, it will transmit the polarizing beam splitting dielectric film of the third polarizer 0551 to the second polarizer 0511, and then transmit the second polarizer
  • the polarizing beam splitting dielectric film of the sheet 0511 is transmitted to the reflective prism 0513; when the second wavelength signal light ⁇ 2 is transmitted to the reflective film of the reflective prism 0513, it will be reflected and output by the reflective film of the reflective prism 0513.
  • first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 are combined, and the second wavelength light ⁇ 2 and the first wavelength light ⁇ 1 will not be doped, so as not to cause the first wavelength signal light ⁇ 1 and the second wavelength signal light ⁇ 2 is cross-talked by the first wavelength light ⁇ 1 and the second wavelength light ⁇ 2.
  • the light emitting sub-module 400 provided by the embodiments of the present disclosure further includes a Faraday rotator 4058 .
  • the Faraday rotator 4057 is arranged at the output end of the reflected light path of the second polarization beam splitter 4055, and the Faraday rotator 4058 has the function of optical isolation.
  • the positions of the first laser chip 404a1 and the second laser chip 404a2 are only an example, and the positions of the first laser chip 404a1 and the second laser chip 404a2 are not limited to those shown in the figure.
  • the structure shown in 8 can also be transformed into other forms or structures. For example, the positions of the first laser chip 404a1 and the second laser chip 404a2 are exchanged.
  • the second wavelength light generated by the first laser chip 404a1 when turned off and on is leaked through the first filter and will not generate the second wavelength signal light generated when the second laser chip 404a2 is operating Crosstalk
  • the first wavelength light is leaked out through the second filter and will not cause crosstalk to the first wavelength signal light when the first laser chip 404a1 is working, thereby avoiding light
  • the laser chips in the module are turned on or off, chirp crosstalk occurs between the laser chips.
  • adjusting the structure of the beam splitting component and the position and number of narrow-band filters can effectively generate chirp crosstalk between the laser chips.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Semiconductor Lasers (AREA)

Abstract

Module optique (200), comprenant : une carte de circuit imprimé (300) ; une première puce laser (404a1) qui est électriquement connectée à la carte de circuit imprimé (300) et peut émettre une lumière d'une première longueur d'onde et d'une seconde longueur d'onde ; un premier filtre (4054) qui reçoit la lumière émise par la première puce laser (404a1) et peut réfléchir la lumière de la première longueur d'onde et transmettre la lumière de la seconde longueur d'onde ; un second filtre (4057) qui reçoit la lumière émise par une seconde puce laser (404a2) et peut réfléchir la lumière de la seconde longueur d'onde et transmettre la lumière de la première longueur d'onde ; et un composant de combinaison d'ondes qui peut recevoir la lumière de la première longueur d'onde réfléchie par le premier filtre (4054), recevoir la lumière de la seconde longueur d'onde réfléchie par le second filtre (4057), et combiner la lumière reçue de la première longueur d'onde et de la lumière de la seconde longueur d'onde en un faisceau.
PCT/CN2021/118902 2020-11-11 2021-09-17 Module optique WO2022100278A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202011251595.XA CN114488425B (zh) 2020-11-11 一种光模块
CN202011256470.6 2020-11-11
CN202011256470.6A CN114488426A (zh) 2020-11-11 2020-11-11 一种光模块
CN202011251595.X 2020-11-11

Publications (1)

Publication Number Publication Date
WO2022100278A1 true WO2022100278A1 (fr) 2022-05-19

Family

ID=81600827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/118902 WO2022100278A1 (fr) 2020-11-11 2021-09-17 Module optique

Country Status (1)

Country Link
WO (1) WO2022100278A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023245968A1 (fr) * 2022-06-21 2023-12-28 青岛海信宽带多媒体技术有限公司 Module optique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080252875A1 (en) * 2004-11-04 2008-10-16 Michiyo Saito Laser beam projecting device
CN201608423U (zh) * 2010-01-18 2010-10-13 华为技术有限公司 激光器和光收发机
CN202649536U (zh) * 2012-05-09 2013-01-02 无锡波汇光电科技有限公司 一种光电发射模块
CN202940814U (zh) * 2012-05-09 2013-05-15 上海波汇通信科技有限公司 一种多波长光信号的发射器件
CN103792673A (zh) * 2014-01-16 2014-05-14 中国科学院合肥物质科学研究院 一种多波长激光束偏振合束装置
CN106330328A (zh) * 2015-07-10 2017-01-11 青岛海信宽带多媒体技术有限公司 光模块及其光信号输出控制方法
CN107431552A (zh) * 2015-04-15 2017-12-01 华为技术有限公司 光模块及网络设备
CN110868258A (zh) * 2018-08-27 2020-03-06 中兴通讯股份有限公司 一种相干检测的实现装置、系统及方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080252875A1 (en) * 2004-11-04 2008-10-16 Michiyo Saito Laser beam projecting device
CN201608423U (zh) * 2010-01-18 2010-10-13 华为技术有限公司 激光器和光收发机
CN202649536U (zh) * 2012-05-09 2013-01-02 无锡波汇光电科技有限公司 一种光电发射模块
CN202940814U (zh) * 2012-05-09 2013-05-15 上海波汇通信科技有限公司 一种多波长光信号的发射器件
CN103792673A (zh) * 2014-01-16 2014-05-14 中国科学院合肥物质科学研究院 一种多波长激光束偏振合束装置
CN107431552A (zh) * 2015-04-15 2017-12-01 华为技术有限公司 光模块及网络设备
CN107431552B (zh) * 2015-04-15 2019-02-26 华为技术有限公司 光模块及网络设备
CN106330328A (zh) * 2015-07-10 2017-01-11 青岛海信宽带多媒体技术有限公司 光模块及其光信号输出控制方法
CN110868258A (zh) * 2018-08-27 2020-03-06 中兴通讯股份有限公司 一种相干检测的实现装置、系统及方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023245968A1 (fr) * 2022-06-21 2023-12-28 青岛海信宽带多媒体技术有限公司 Module optique

Similar Documents

Publication Publication Date Title
CN209879078U (zh) 光模块
CN114035285B (zh) 一种光模块
CN111061019A (zh) 一种光模块
CN117693697A (zh) 光模块
CN215678864U (zh) 一种光模块
WO2022100278A1 (fr) Module optique
CN113625399B (zh) 一种光模块
WO2023035711A1 (fr) Module optique
CN113805290B (zh) 一种光模块
WO2022127295A1 (fr) Module optique
US20210356683A1 (en) Optical module
WO2022007428A1 (fr) Module optique
CN114488425B (zh) 一种光模块
CN114647037A (zh) 一种光模块
WO2023093130A1 (fr) Module optique
WO2024093070A1 (fr) Module optique
CN219936149U (zh) 光模块
CN113805289B (zh) 一种光模块
WO2024066092A1 (fr) Module optique
CN213210542U (zh) 一种光模块
CN214540151U (zh) 一种光模块
WO2024036975A1 (fr) Module optique
CN114488426A (zh) 一种光模块
WO2023045423A1 (fr) Module optique
CN216160876U (zh) 一种光模块

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21890806

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21890806

Country of ref document: EP

Kind code of ref document: A1