CN220552462U - Optical transceiver component and optical fiber gyroscope - Google Patents
Optical transceiver component and optical fiber gyroscope Download PDFInfo
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- CN220552462U CN220552462U CN202322012215.2U CN202322012215U CN220552462U CN 220552462 U CN220552462 U CN 220552462U CN 202322012215 U CN202322012215 U CN 202322012215U CN 220552462 U CN220552462 U CN 220552462U
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Abstract
The utility model provides an optical transceiver component and an optical fiber gyro, the optical transceiver component at least comprises a shell, an optical emission component, a first collimating lens, an optical receiving component, a second collimating lens, a circulator and an adapter component fixed at an optical outlet of the shell, wherein the optical emission component, the first collimating lens, the optical receiving component, the second collimating lens and the adapter component are arranged in the shell, and the adapter component is characterized in that: the first port of the circulator is arranged corresponding to one surface of the first collimating lens, the second port of the circulator is arranged corresponding to the adapter component, and the third port of the circulator is arranged corresponding to one surface of the second collimating lens; the light emitting component is correspondingly arranged on the other surface of the first collimating lens; the light receiving component is arranged corresponding to the other surface of the second collimating lens. The utility model integrates the light emitting component, the circulator and the light receiving component into a shell, adopts space light transmission in the shell, and does not adopt an optical fiber structure, thus having the characteristics of small insertion loss, high integration level, small size, insensitivity to temperature and higher stability.
Description
Technical Field
The present utility model relates to the field of optical devices, and in particular, to an optical transceiver and an optical fiber gyro.
Background
The optical fiber gyro is an optical fiber angular velocity sensor, which is an optical fiber sensor for inertial navigation. The fiber-optic gyroscope is based on the Sagnac effect, namely, after light waves which are oppositely transmitted along a closed light path return to a starting point to interfere, the phase difference of interference signals is proportional to the input angular speed of a sensitive axis of the closed light path.
Referring to fig. 1, the conventional fiber optic gyroscope mainly includes a laser (light source), a coupler, a detector, a Y waveguide and a fiber optic ring, wherein the laser/light source emits light, the light is input to the Y waveguide through the coupler and is divided into two paths of light, and the two paths of light are transmitted in different directions through the fiber optic ring and then return, and then return to the Y waveguide and the coupler and are received by the detector. The two beams of light are converged to generate an interference signal, the intensity of the interference signal changes along with the input angular velocity change of the normal direction of the optical fiber ring, and the intensity change of the interference signal is detected by the detector, so that the input angular velocity change can be obtained.
All parts of the existing fiber optic gyroscope adopt discrete devices, and the discrete devices are assembled together through fiber fusion. But discrete devices are large in size, complex in assembly process, multiple in fusion points, large in loss and low in coupling efficiency. In addition, the optical fiber is easily affected by temperature variation, and stability and accuracy of the measurement of the optical fiber gyro are affected.
Disclosure of Invention
In order to meet the requirements of more application scenes, the utility model provides an optical transceiver component and an optical fiber gyro, and the technical scheme is as follows:
an optical transceiver module at least includes the casing to and set up at the inside optical emission subassembly of casing, first collimating lens, optical receiving module, second collimating lens, circulator, still including being fixed in the adapter subassembly of the light outlet of casing, wherein:
the first port of the circulator is arranged corresponding to one surface of the first collimating lens, the second port of the circulator is arranged corresponding to the adapter component, and the third port of the circulator is arranged corresponding to one surface of the second collimating lens;
the light emitting component is arranged corresponding to the other surface of the first collimating lens and comprises a light emitting chip;
the light receiving component is arranged corresponding to the other surface of the second collimating lens, and comprises a light detector.
Further, the light receiving assembly at least comprises a side light receiving chip.
Further, the optical transceiver assembly further comprises a reflecting mirror, and the reflecting mirror is located on an optical path between the optical receiving assembly and the second collimating lens.
Further, the optical transceiver assembly further comprises a third collimating lens, and the third collimating lens is arranged on an optical path between the second port of the circulator and the adapter assembly.
Further, the adapter assembly at least comprises a ferrule and a third collimating lens attached to the ferrule and corresponding to the second port of the circulator.
Further, the optical transceiver assembly further comprises a TEC thermoelectric cooler, and the optical emission assembly, the first collimating lens, the second collimating lens and the circulator are all arranged on a cold face of the TEC thermoelectric cooler.
Further, the optical transceiver assembly further comprises a plurality of cushion blocks arranged on the TEC thermoelectric cooler and used for enabling the optical paths of the optical emission assembly, the first collimating lens, the second collimating lens and the circulator to be matched.
Further, the thermoelectric refrigerator of TEC sets up the position that is close to the light outlet of casing, the light receiving component sets up the position that keeps away from the casing light outlet in the casing, two other survey of casing are provided with external pin, still be provided with positive and negative electrode pad on the thermoelectric refrigerator of TEC, positive and negative electrode pad is close to the external pin setting of one side, the external pin setting that the light emitting component is close to the opposite side.
Further, the light receiving assembly comprises a side light receiving chip and an FET front end amplifying circuit.
On the other hand, the utility model also discloses an optical fiber gyro which at least comprises the optical transceiver component, the optical fiber gyro further comprises a Y waveguide and an optical fiber ring, one end of the adapter component, which is far away from the light outlet of the shell, is connected with the Y waveguide, and the other end of the Y waveguide is connected with the optical fiber ring.
Based on the technical scheme, the utility model has the following beneficial effects compared with the prior art:
the utility model discloses an optical transceiver module, which at least comprises a shell, an optical emission module and a first collimating lens, wherein the optical emission module and the first collimating lens are arranged in the shell, light receiving element, second collimating lens, circulator still include be fixed in the adapter subassembly of the light outlet of casing, wherein: the first port of the circulator is arranged corresponding to one surface of the first collimating lens, the second port of the circulator is arranged corresponding to the adapter component, and the third port of the circulator is arranged corresponding to one surface of the second collimating lens; the light emitting component is arranged corresponding to the other surface of the first collimating lens and comprises a light emitting chip; the light receiving component is arranged corresponding to the other surface of the second collimating lens, and comprises a light detector. The circulator of the utility model realizes the function of a passive coupler in the prior art, integrates the light emitting component, the circulator and the light receiving component into a shell, adopts space light transmission in the shell, and does not adopt an optical fiber structure, thus having the characteristics of small insertion loss, high integration level, small size, insensitivity to temperature and higher stability.
Drawings
FIG. 1 is a schematic diagram of a prior art fiber optic gyroscope;
FIG. 2 is a schematic perspective view of an optical fiber gyro according to an embodiment of the present utility model;
fig. 3 is a schematic top view of an optical transceiver module according to an embodiment of the present utility model;
fig. 4 is a schematic cross-sectional view of an optical transceiver module according to an embodiment of the present utility model;
FIG. 5 is a simplified schematic diagram of an emission light path when the optical transceiver module works in one to the third embodiments of the present utility model;
fig. 6 is a simplified schematic diagram of a receiving optical path when the optical transceiver module works in the first to third embodiments of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
Referring to fig. 2, 3 and 4, an optical transceiver module at least includes a housing 1, and a light emitting module 2, a first collimating lens 3, a light receiving module 4, a second collimating lens 5 and a circulator 6 disposed inside the housing, and an adapter module 7 fixed at a light outlet of the housing 1, wherein:
the first port of the circulator 6 is arranged corresponding to one face 3 of the first collimating lens, the second port of the circulator 6 is arranged corresponding to the adapter assembly 7, and the third port of the circulator 6 is arranged corresponding to one face of the second collimating lens 5. The adapter assembly 7 comprises at least an adapter tube and a ferrule in which an optical fiber is arranged.
The light emitting module 2 is disposed corresponding to the other surface of the first collimating lens 3, and includes at least a light emitting chip and a circuit board (or COC board).
The light receiving assembly 4 is arranged corresponding to the other surface of the second collimating lens 5, and comprises a light detector and a circuit substrate which is convenient to be connected with the pins of the shell.
Referring to fig. 5 and 6, the working principle of the optical transceiver module is as follows:
emission light path: the light emitting assembly 2 emits light that is collimated into parallel light by the first collimating lens 3, and then transmitted to the first port of the circulator 6, and then out through the second port of the circulator, and directed to the optical port adapter assembly 7.
Receiving light path: the light transmitted back from the optical fiber of the adapter assembly 7 is input from the second port of the circulator, output from the third port of the circulator, and is reversely converged to the light receiving assembly 4 through the second collimating lens 5 to be received.
The optical transceiver component can be applied to the fiber-optic gyroscope to replace a laser (light source), a coupler and a detector which are arranged separately in the existing fiber-optic gyroscope. The circulator of the utility model realizes the function of a passive coupler in the prior art, integrates a light emitting component (laser), the circulator and a light receiving component (light detector) into a shell 1, adopts space light transmission in the shell 1 and does not adopt an optical fiber structure, thus having the characteristics of small insertion loss, high integration level, small size, insensitivity to temperature and higher stability.
Example two
Referring to fig. 2, 3 and 4, an optical transceiver module at least includes a housing 1, and a light emitting module 2, a first collimating lens 3, a light receiving module 4, a second collimating lens 5 and a circulator 6 disposed inside the housing, and an adapter module 7 fixed at a light outlet of the housing 1, wherein:
the first port of the circulator 6 is arranged corresponding to one face 3 of the first collimating lens, the second port of the circulator 6 is arranged corresponding to the adapter assembly 7, and the third port of the circulator 6 is arranged corresponding to one face of the second collimating lens 5. The adapter assembly 7 comprises at least an adapter tube and a ferrule in which an optical fiber is arranged.
The light emitting module 2 is disposed corresponding to the other surface of the first collimating lens 3, and includes at least a light emitting chip and a circuit board (or COC board).
The light receiving assembly 4 is arranged corresponding to the other surface of the second collimating lens 5, and comprises a light detector and a circuit substrate which is convenient to be connected with the pins of the shell. In some embodiments, the optical transceiver assembly further includes a reflecting mirror, which is located on the optical path between the optical receiving assembly 4 and the second collimating lens 5, and is configured to reflect the light output through the second collimating lens 5 in a reverse converging manner, so as to match the optical path. In other embodiments, the preferred light receiving component 4 includes a side light receiving chip, and the side light receiving chip is directly opposite to the second collimating lens 5 to achieve light path matching, so that a separate reflector is not required, and the structure of the light receiving and transmitting component is simpler.
Preferably, in order to improve the coupling efficiency, the optical transceiver assembly further includes a third collimating lens 71, where the third collimating lens 71 is disposed on the optical path between the second port of the circulator and the adapter assembly 7, or the third collimating lens 71 is attached to the ferrule, that is, the third collimating lens 71 is integrally disposed with the adapter assembly 7. Specifically, the emitted light from the second port of the circulator may be back-converged into the optical fiber of the adapter assembly via the third collimating lens 71.
Referring to fig. 5 and 6, the working principle of the optical transceiver module is as follows:
emission light path: the light emitting component 2 emits light which is collimated into parallel light by the first collimating lens 3, then transmitted to the first port of the circulator 6, and then transmitted out through the second port of the circulator 6 and directed to the light port adapter component 7. In particular, the emitted light coming out of the second port of the circulator 6 may be back-converged into the optical fiber of the adapter assembly 7 via the third collimating lens 71.
Receiving light path: the light transmitted back from the optical fiber of the adapter assembly 7 is collimated into parallel light by the third collimating lens 71, input from the second port of the circulator 6, output from the third port of the circulator 6, and received by the light receiving assembly 4 through the second collimating lens 5.
The optical transceiver component can be applied to the fiber-optic gyroscope to replace a laser (light source), a coupler and a detector which are arranged separately in the existing fiber-optic gyroscope. The circulator of the utility model realizes the function of a passive coupler in the prior art, integrates a light emitting component (laser), the circulator and a light receiving component (light detector) into a shell 1, adopts space light transmission in the shell 1 and does not adopt an optical fiber structure, thus having the characteristics of small insertion loss, high integration level, small size, insensitivity to temperature and higher stability. The light receiving component 4 adopts a side light receiving chip, the side light receiving chip is directly opposite to the second collimating lens 5, so that the light path matching can be realized, an independent reflector is not required, and the structure of the light receiving and transmitting component is simpler; the coupling efficiency can be further improved by the third collimator lens 71.
Example III
Referring to fig. 2, 3 and 4, an optical transceiver module at least includes a housing 1, and a light emitting module 2, a first collimating lens 3, a light receiving module 4, a second collimating lens 5, a circulator 6, a tec thermoelectric cooler 8, and an adapter module 7 fixed at a light outlet of the housing 1, where:
the light emitting assembly 2, the first collimating lens 3, the second collimating lens 5 and the circulator 6 are all arranged on the cold face of a TEC thermoelectric cooler 8, and the thermistor of the TEC thermoelectric cooler is placed close to the light emitting assembly. In order to match the heights of the light paths of the light emitting component 2, the first collimating lens 3, the second collimating lens 5 and the circulator 6, the TEC thermoelectric refrigerator further comprises a plurality of cushion blocks, and corresponding height matching cushion blocks and the like can be arranged according to the requirement.
The first port of the circulator 6 is arranged corresponding to one face 3 of the first collimating lens, the second port of the circulator 6 is arranged corresponding to the adapter assembly 7, and the third port of the circulator 6 is arranged corresponding to one face of the second collimating lens 5. The adapter assembly 7 comprises at least an adapter tube and a ferrule in which an optical fiber is arranged.
The light emitting module 2 is disposed corresponding to the other surface of the first collimating lens 3, and includes at least a light emitting chip and a circuit board (or COC board).
The light receiving assembly 4 is arranged corresponding to the other surface of the second collimating lens 5, and comprises a light detector and a circuit substrate which is convenient to be connected with the pins of the shell.
In order to reasonably arrange the internal structure of the shell 1, considering the circuit part which mainly comprises the positive and negative electrode bonding pads 81 and the emitting component 2 and needs electric connection pins on the TEC thermoelectric cooler 8, the main body layout is to lead the positive and negative electrode bonding pads 81 to be close to one side pin; the emitting component 2 is close to the pins on the other side, so that the routing distance on both sides can be guaranteed to be close. Preferably, the TEC thermoelectric cooler 8 is arranged at a position close to the light outlet of the casing 1, the light receiving component 4 is arranged at a position far away from the light outlet in the casing 1, external pins are arranged on the other two sides of the casing, the TEC thermoelectric cooler 8 is also provided with a positive electrode pad 81, the positive electrode pad 81 is arranged close to the external pin on one side, and the light emitting component 2 is arranged close to the external pin on the other side. Referring to fig. 2, the tec thermoelectric cooler 8 is placed in the package 1 near the light port of the package, and the positive and negative electrode pads 81 are placed near the pins on one side of the butterfly package. The light emitting component 2 is arranged on the other side of the TEC thermoelectric cooler 8 far from the positive and negative electrode bonding pads 81, namely, near the pins on the other side of the butterfly-shaped tube shell. The light receiving element 4 is disposed at an end of the housing 1 away from the light outlet of the housing 1.
In some embodiments, the light receiving component 4 includes a side-receiving chip plus FET front-end amplification circuit structure (an amplification circuit composed of various field effect transistors), that is, a PIN-FET component structure is adopted. Because the PIN-FET component structure occupies a larger space, the layout structure of the embodiment can provide enough space for the receiving end, so that the scheme of only adopting the receiving chip and the scheme of the receiving chip plus the FET front-end amplifying circuit can be compatible. The layout of fig. 2 can shorten the wire bonding length between the light emitting component 2 and the shell 1 as much as possible, and ensure the emission performance; on the other hand, a sufficient space can be left for the light receiving element 4 to be compatible with the scheme of the side light receiving chip plus the FET front end amplifying circuit and the scheme of the side light receiving chip only. The optical transceiver component can be applied to the fiber-optic gyroscope to replace a laser (light source), a coupler and a detector which are arranged separately in the existing fiber-optic gyroscope.
Example IV
The utility model also discloses a fiber optic gyroscope, which comprises an optical transceiver component as in the first embodiment or the second embodiment or the third embodiment, wherein the fiber optic gyroscope further comprises a Y waveguide and an optical fiber ring, one end of the adapter component 7 is fixed at the light outlet of the shell 1, the other end of the adapter component is connected with the Y waveguide, and the other end of the Y waveguide is connected with the optical fiber ring. The light input to the Y waveguide by the adapter assembly 7 is split into two paths, and the two paths of light are transmitted through the optical fiber ring respectively along different directions and then return, and then return to the Y waveguide, the adapter assembly 7 and the circulator 6 to be received by the light receiving assembly.
The working principle of the fiber optic gyroscope is as follows:
the light emitted by the light emitting component 2 is collimated into parallel light by the first collimating lens 3, then transmitted to the first port of the circulator 6, and then transmitted out through the second port of the circulator 6 and directed to the light port adapter component 7. In particular, the emitted light from the second port of the circulator 6 may be back-converged into the optical fiber of the adapter assembly 7 via the third collimating lens 71. The light input to the Y waveguide by the adapter assembly 7 is split into two paths, and the two paths of light are transmitted through the optical fiber ring respectively along different directions and then return, and then return to the Y waveguide, the adapter assembly 7 and the circulator 6 to be received by the light receiving assembly.
The light transmitted back from the optical fiber of the adapter assembly 7 is collimated into parallel light by the third collimating lens 71, and is input from the second port of the circulator 6, and then output from the third port of the circulator 6, and is reversely converged to the light receiving assembly 4 by the second collimating lens 5.
The fiber optic gyroscope has the characteristics of small insertion loss, high integration level, small size, insensitivity to temperature, higher stability and the like.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, utility model lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment of this utility model.
The foregoing description includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, as used in the specification or claims, the term "comprising" is intended to be inclusive in a manner similar to the term "comprising," as "comprising," is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean "non-exclusive or".
Claims (9)
1. The utility model provides an optical transceiver module which characterized in that includes the casing at least, sets up at the inside light emission subassembly of casing, first collimating lens, light receiving element, second collimating lens, circulator to and be fixed in the adapter subassembly of the light outlet of casing, wherein:
the first port of the circulator is arranged corresponding to one surface of the first collimating lens, the second port of the circulator is arranged corresponding to the adapter component, and the third port of the circulator is arranged corresponding to one surface of the second collimating lens;
the light emitting component is arranged corresponding to the other surface of the first collimating lens and comprises a light emitting chip;
the light receiving component is arranged corresponding to the other surface of the second collimating lens, and comprises a light detector.
2. The optical transceiver module of claim 1, wherein the optical receiving module comprises at least a side-receiving optical chip.
3. The optical transceiver of claim 2, wherein the optical receiving assembly comprises a side-receiving optical chip and an FET front-end amplifier circuit.
4. The optical transceiver assembly of claim 1, further comprising a mirror positioned in the optical path between the optical receiving assembly and the second collimating lens.
5. The optical transceiver module of any one of claims 1-4, further comprising a third collimating lens disposed in an optical path between the second port of the circulator and the adapter assembly.
6. The optical transceiver module of any one of claims 1-4, wherein the adapter module comprises at least a ferrule and a third collimating lens attached to the ferrule corresponding to the second port of the circulator.
7. The optical transceiver assembly of any one of claims 1-4, further comprising a TEC thermoelectric cooler, wherein the light emitting assembly, the first collimating lens, the second collimating lens, and the circulator are disposed on a cold face of the TEC thermoelectric cooler.
8. The optical transceiver module of claim 7, wherein the TEC thermoelectric cooler is disposed at a position close to the light outlet of the housing, the optical receiving module is disposed in the housing at a position far away from the light outlet of the housing, two other sides of the housing are provided with external pins, the TEC thermoelectric cooler is further provided with positive and negative electrode pads, the positive and negative electrode pads are disposed close to the external pins on one side, and the optical transmitting module is disposed close to the external pins on the other side.
9. An optical fiber gyro, at least comprising an optical transceiver module according to any one of claims 1 to 8, a Y waveguide and an optical fiber ring, wherein one end of the adapter module far away from the light outlet of the housing is connected to the Y waveguide, and the other end of the Y waveguide is connected to the optical fiber ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322012215.2U CN220552462U (en) | 2023-07-28 | 2023-07-28 | Optical transceiver component and optical fiber gyroscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322012215.2U CN220552462U (en) | 2023-07-28 | 2023-07-28 | Optical transceiver component and optical fiber gyroscope |
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| CN220552462U true CN220552462U (en) | 2024-03-01 |
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| CN202322012215.2U Active CN220552462U (en) | 2023-07-28 | 2023-07-28 | Optical transceiver component and optical fiber gyroscope |
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