Fiber-optic gyroscope multi-channel transceiver and optical power monitoring method
By integrating a light source chip, a beam splitter prism, and a PD detector chip, the design solves the problems of large size and high cost of traditional fiber optic gyroscope systems, achieving miniaturization and cost reduction of fiber optic gyroscopes, and stabilizing the light source output through optical power monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-07
AI Technical Summary
In traditional fiber optic gyroscope systems, discrete components are connected by fiber optic fusion splicing, resulting in large system size, complex assembly, and high cost, making it difficult to meet the miniaturization and low-cost requirements of devices in military, aerospace, and other fields.
It adopts an integrated design of light source chip, multiple beam splitters and PD detector chip, realizes equal power distribution of three optical paths through beam splitters, and makes real-time adjustments using optical power monitoring methods, integrating the functions of light source, coupler and detector.
The miniaturization and integration of fiber optic gyroscopes have been achieved, reducing costs. Furthermore, the light source output has been stabilized through optical power monitoring, avoiding power fluctuations caused by temperature drift.
Smart Images
Figure CN121804445A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of fiber-optic gyroscope, and particularly relates to a fiber-optic gyroscope multi-channel transceiver device and an optical power monitoring method. BACKGROUND
[0002] A traditional fiber-optic gyroscope system is composed of discrete optical elements, including multiple SLD light sources, couplers and PD detectors. The principle is that a light is emitted by a light source, reaches a modulator after passing through a coupler, the modulator divides the light into two lights with the same characteristics and opposite directions, which enter two ends of a fiber-optic ring, if the plane where the fiber-optic ring is located changes in angle, the two lights will form an optical path difference, when the two lights pass through the modulator and the coupler to reach the detector and are converted into signals, the rotation angle of the plane where the fiber-optic ring is located can be calculated according to the optical path difference. The PD detector receives interference signals of the two lights and converts them into electrical signals, and the corresponding angular velocity change information is obtained by detecting the change in the interference signal intensity.
[0003] In the traditional fiber-optic gyroscope system, the discrete elements are connected through fiber-optic fusion, which leads to a large system size, complex assembly and high cost. With the wide application of fiber-optic gyroscopes in military, aerospace and other fields, higher requirements are put forward for miniaturization, integration and low cost of the devices. SUMMARY
[0004] The present application provides a fiber-optic gyroscope multi-channel transceiver device and an optical power monitoring method, to miniaturize, integrate and reduce the cost of the fiber-optic gyroscope.
[0005] The present application provides a fiber-optic gyroscope multi-channel transceiver device, comprising: a light source chip for generating outgoing light; a plurality of first light splitting prisms, each first light splitting prism splits the outgoing light according to a specific transmission ratio and reflection ratio, and finally outputs three primary outgoing lights with equal power through three first light splitting prisms; a plurality of second light splitting prisms for receiving three primary outgoing lights output by the first light splitting prisms respectively, each second light splitting prism further splits light according to the same transmission ratio and reflection ratio, wherein the transmitted light is output as final outgoing light to an external polarizer, and the reflected light is absorbed or used for system calibration, to realize equal distribution of optical power of the three final outgoing lights; a plurality of PD detector chips for receiving multiple input lights and converting them into electrical signals; a tube shell pin for supplying power to the light source chip and outputting the electrical signals converted by the PD detector chips.
[0006] The application has the beneficial effects that: a light source chip is used to generate outgoing light; a plurality of first light splitting prisms each split the outgoing light according to a specific transmission ratio and reflection ratio, and finally three primary outgoing lights with equal power are respectively output through the three first light splitting prisms; a plurality of second light splitting prisms are used to respectively receive the three primary outgoing lights output by the first light splitting prisms, each second light splitting prism further splits the light according to the same transmission ratio and reflection ratio, wherein the transmitted light is output as final outgoing light to an external polarizer, and the reflected light is absorbed or used for system calibration, so as to realize equal power distribution of the three final outgoing lights; a plurality of PD detector chips are used to receive a plurality of input lights and convert them into electrical signals; and a tube shell pin is used to power the light source chip and output the electrical signals converted by the PD detector chips. Through the plurality of first light splitting prisms and second light splitting prisms, one outgoing light is split into three final outgoing lights with equal power distribution, and a plurality of input lights can be accepted, which is equivalent to integrating three light sources, three couplers and three detectors in the prior art, realizes miniaturization and integration of the fiber-optic gyroscope, and reduces the cost.
[0007] In one embodiment, the plurality of first light splitting prisms include a light splitting prism 1, a light splitting prism 3 and a light splitting prism 5, which are used to ensure power balance of the plurality of primary outgoing lights; The light splitting prism 1 adopts a light splitting ratio of 1 / 3 transmission and 2 / 3 reflection to split the incident light into transmitted light 1 and reflected light 2; The light splitting prism 3 adopts a light splitting ratio of 1 / 2 transmission and 1 / 2 reflection to split the reflected light 2 into transmitted light 3 and reflected light 4; The light splitting prism 5 adopts a light splitting characteristic of 100% reflection to reflect the transmitted light 3 from the light splitting prism 3 into reflected light 5.
[0008] In one embodiment, the plurality of second light splitting prisms include a light splitting prism 2, a light splitting prism 4 and a light splitting prism 6; The light splitting prisms 2, 4 and 6 adopt a light splitting ratio of 1 / 2 transmission and 1 / 2 reflection to respectively split the primary outgoing light from the light splitting prisms 1, 3 and 5 into transmitted light and reflected light.
[0009] In one embodiment, the output light path of the fiber-optic gyroscope multi-channel transceiver device is as follows: The outgoing light first passes through the light splitting prism 1, 1 / 3 of the outgoing light is transmitted to form the transmitted light 1, and 2 / 3 of the outgoing light is reflected to form the reflected light 2; The transmitted light 1 enters the light splitting prism 2, 1 / 2 of the transmitted light 1 is transmitted and coupled with the optical fiber to form the first final outgoing light, and 1 / 2 of the transmitted light 1 is reflected and absorbed; The reflected light 2 enters the light splitting prism 3, 1 / 2 of the reflected light 2 is transmitted to form the transmitted light 3, and 1 / 2 of the reflected light 2 is reflected to form the reflected light 4; The reflected light 4 enters the light splitting prism 4, 1 / 2 of the reflected light 4 is transmitted and coupled with the optical fiber to form the second final exit light, and 1 / 2 of the reflected light 4 is reflected and absorbed; The transmitted light 3 enters the light splitting prism 5, and 100% of the transmitted light 3 is reflected to form the reflected light 5; The reflected light 5 enters the light splitting prism 6, 1 / 2 of the reflected light 5 is transmitted and coupled with the optical fiber to form the third final exit light, and 1 / 2 of the reflected light 5 is reflected and absorbed.
[0010] In an embodiment, the plurality of PD detector chips receives a plurality of input lights through a plurality of second light splitting prisms, wherein the plurality of second light splitting prisms guide the incident light returned by the external polarizer to the PD detector chips through a specific reflection ratio.
[0011] In an embodiment, the input light path of the fiber-optic gyroscope multi-transceiver device is as follows: The input light 1 passes through the light splitting prism 2, 1 / 2 of the input light 1 is transmitted, and 1 / 2 of the input light 1 is reflected into the PD detector chip 1; The input light 2 passes through the light splitting prism 4, 1 / 2 of the input light 2 is transmitted, and 1 / 2 of the input light 2 is reflected into the PD detector chip 2; The input light 3 passes through the light splitting prism 6, 1 / 2 of the input light 3 is transmitted, and 1 / 2 of the input light 3 is reflected into the PD detector chip 3.
[0012] In an embodiment, the fiber-optic gyroscope multi-transceiver device further comprises: A collimating lens for collimating the exit light before the exit light enters the light splitting prism.
[0013] The application also provides a light power monitoring method for a fiber-optic gyroscope multi-transceiver device, comprising: Real-time monitoring of the preset light power in the fiber-optic gyroscope multi-transceiver device according to any one of the embodiments, wherein the preset light power includes the exit light generated by the light source chip, the light power of the primary exit light generated after the light splitting by each first light splitting prism, the light power of the incident light returned by the external polarizer after reflection by the second light splitting prism, and the light power of the final incident light received by the detector chip; When the preset light power does not meet the preset condition, adjusting the preset light power.
[0014] In an embodiment, when the preset light power does not meet the preset condition, adjusting the preset light power, comprising: When the preset light power is unbalanced, at least adjusting the light splitting ratio to achieve power balance adjustment.
[0015] When the preset optical power value exceeds the normal power range, the light source intensity is controlled by adjusting the drive current of the light source chip so that the preset optical power value falls within the normal power range.
[0016] In one embodiment, the method further includes: The operating temperature of the light source chip is adjusted by using a temperature control element to keep the operating temperature of the light source chip within the normal temperature range.
[0017] The beneficial effect of this embodiment is that controlling the operating temperature of the light source chip within the normal temperature range aims to stabilize the wavelength and power of the emitted light generated by the light source chip and avoid power fluctuations caused by temperature drift.
[0018] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.
[0019] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0020] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a fiber optic gyroscope multiplexer according to one embodiment of this application; Figure 2 This is a schematic diagram of a single-axis fiber optic gyroscope optical path system in the prior art; Figure 3 This is the output optical path of a fiber optic gyroscope multiplexer in one embodiment of this application; Figure 4 This is the output optical path of a fiber optic gyroscope multiplexer in one embodiment of this application. Detailed Implementation
[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.
[0022] Figure 1 This is a schematic diagram of the structure of a fiber optic gyroscope multiplexer according to one embodiment of this application, as shown below. Figure 1 This application provides a fiber optic gyroscope multiplexer, comprising: A light source chip used to generate emitted light; Multiple first beam splitters, each first beam splitter splits the outgoing light according to a specific transmission ratio and reflection ratio, and finally outputs three primary outgoing lights of equal power through the three first beam splitters respectively; Multiple second beam splitters are used to receive the three primary output beams from the first beam splitter respectively. Each second beam splitter further splits the beams according to the same transmission and reflection ratios. The transmitted light is output as the final output beam to an external polarizer, and the reflected light is absorbed or used for system calibration to achieve a balanced distribution of optical power of the three final output beams. Multiple PD detector chips are used to receive multiple input light sources and convert them into electrical signals; The housing pins are used to power the light source chip and output the electrical signals converted by the PD detector chip.
[0023] Fiber optic gyroscopes measure attitude by utilizing the rotation of an interferometric measurement system. Figure 2 This is a schematic diagram of a single-axis fiber optic gyroscope optical path system in the prior art, such as... Figure 2 As shown, the optical system of a single-axis fiber optic gyroscope includes a light source, a detector, a coupler, a polarizer, and a fiber optic ring. During operation, the light beam emitted from the light source passes through the coupler and polarizer. The modulator splits this light into two beams with similar characteristics but opposite directions, which enter the two ends of the fiber optic ring respectively. If the plane containing the fiber optic ring changes angle, these two beams will form an optical path difference. When these two beams return, they pass through the modulator and coupler to reach the detector and are converted into electrical signals. The rotation angle of the plane containing the fiber optic ring can then be calculated based on the optical path difference.
[0024] A typical fiber optic gyroscope has three axes (X, Y, and Z). A typical three-axis fiber optic gyroscope consists of one SLD (Surface Mount Light) source device, three PD (Digital Photodetector) detectors, three fiber optic couplers, three modulators, and three fiber optic loops, and is used in military and civilian fields such as missiles, aircraft, and drill bits. With the development of industry and technology, there is a need for miniaturization and lower cost of fiber optic gyroscopes. To reduce the size and cost of fiber optic gyroscope systems, this application integrates some discrete components in existing fiber optic gyroscope systems to form an integrated optical transceiver fiber optic gyroscope multiplexer.
[0025] In this application, the working principle of the fiber optic gyroscope multiplexer is as follows: Power is applied to the light source chip inside the housing through the pins of the housing. The light generated by the light source chip is collimated by a collimating lens and then enters a beam splitter. After passing through multiple beam splitters, multiple output beams are formed and output. The fiber optic output passes through an external polarizer and a fiber optic loop before returning to the multiple input beams. The multiple input beams then pass through beam splitters inside the housing and are incident on different detector chips, forming corresponding optical signals.
[0026] Figure 3 This is the output optical path of the fiber optic gyroscope multiplexer in one embodiment of this application.Figure 4 As shown in one embodiment of this application, the output optical path of the fiber optic gyroscope multiplexer is as follows: Figure 3 and Figure 4 As shown, the multiple first beam-splitting prisms include beam-splitting prism 1, beam-splitting prism 3, and beam-splitting prism 5, used to ensure power balance of the multiple primary output beams. Specifically, beam-splitting prism 1 uses a transmission ratio of 1 / 3 and a reflection ratio of 2 / 3 to split the incident light into transmitted light 1 and reflected light 2; beam-splitting prism 3 uses a transmission ratio of 1 / 2 and a reflection ratio of 1 / 2 to further split the reflected light 2 into transmitted light 3 and reflected light 4; beam-splitting prism 5 uses a 100% reflection beam-splitting characteristic to reflect the transmitted light 3 from beam-splitting prism 3 into reflected light 5. The multiple second beam-splitting prisms include beam-splitting prism 2, beam-splitting prism 4, and beam-splitting prism 6; beam-splitting prisms 2, 4, and 6 use a transmission ratio of 1 / 2 and a reflection ratio of 1 / 2 to split the primary output light from beam-splitting prisms 1, 3, and 5 into transmitted light and reflected light, respectively.
[0027] In one embodiment of this application, the fiber optic gyroscope multiplexer further includes a collimating lens for collimating the outgoing light before it enters the beam splitter.
[0028] like Figure 3 As shown, the principle of the output optical path is as follows: The light emitted from the light source chip is collimated into parallel light by a collimating lens; After collimation, the outgoing light first passes through beam splitter 1. One-third of the outgoing light is transmitted to form transmitted light 1, and two-thirds of the outgoing light is reflected to form reflected light 2. Transmitted light 1 enters beam splitter 2. Half of the transmitted light 1 is transmitted and coupled with the optical fiber to form the first final output light. Half of the transmitted light 1 is reflected and absorbed. The reflected light 2 enters the beam splitter 3. Half of the reflected light 2 is transmitted to form transmitted light 3, and half of the reflected light 2 is reflected to form reflected light 4. The reflected light 4 enters the beam splitter 4. Half of the reflected light 4 is transmitted and coupled with the optical fiber to form the second final output light, while the other half of the reflected light 4 is reflected and absorbed. Transmitted light 3 enters beam splitter 5, and 100% of the transmitted light 3 is reflected to form reflected light 5; The reflected light 5 enters the beam splitter 6. Half of the reflected light 5 is transmitted and coupled with the optical fiber to form the third final output light, while the other half of the reflected light 5 is reflected and absorbed.
[0029] In one embodiment of this application, the plurality of PD detector chips receive multiple input beams through a plurality of second beam-splitting prisms, wherein the plurality of second beam-splitting prisms guide the incident light returned from the external polarizer to the PD detector chips through a specific reflectance ratio. Figure 4 As shown, the principle of the input optical path is as follows: The input light 1 passes through the beam splitter prism 2, half of the input light 1 is transmitted, and half of the input light 1 is reflected into the PD detector chip 1. The input light 2 passes through the beam splitter prism 4, half of the input light 2 is transmitted, and half of the input light 2 is reflected into the PD detector chip 2. The input light 3 passes through the beam splitter 6, half of the input light 3 is transmitted, and half of the input light 3 is reflected into the PD detector chip 3.
[0030] In summary, the fiber optic gyroscope multiplexer provided in this application integrates three light sources, three couplers, and three detectors found in existing fiber optic gyroscope optical path technologies. Power is applied to the light source chip inside the housing via the housing's pins, and the light generated by the chip is processed by the optical system inside the housing to form multiple output beams. The multiple input beams pass through the optical system inside the housing and are incident on different PDs, forming corresponding optical signals.
[0031] Existing technologies require multiple discrete components to be connected together via fiber optic fusion splicing, which occupies a large space and necessitates multiple fiber optic fusion splices during gyroscope installation. In contrast, fiber optic gyroscope multi-channel optical transceivers directly integrate the functions of each discrete component into a single device. Furthermore, the design utilizes discrete optical components, allowing for automated mounting processes during manufacturing, thus simplifying the process.
[0032] In a specific embodiment of this application, taking an 850nm fiber optic gyroscope device as an example, five samples were fabricated and their parameters were tested, as shown in Table 1. According to the test results, the parameters basically meet the requirements and the function can be realized.
[0033] Table 1
[0034] The beneficial effects of this application are as follows: it includes a light source chip for generating outgoing light; multiple first beam splitters, each of which splits the outgoing light according to a specific transmission and reflection ratio, and finally outputs three primary outgoing lights of equal power through the three first beam splitters; multiple second beam splitters for receiving the three primary outgoing lights output by the first beam splitters, each of which further splits the light according to the same transmission and reflection ratio, wherein the transmitted light is output as the final outgoing light to an external polarizer, and the reflected light is absorbed or used for system calibration to achieve a balanced distribution of optical power of the three final outgoing lights; multiple PD detector chips for receiving multiple input lights and converting them into electrical signals; and housing pins for powering the light source chip and outputting the electrical signals converted by the PD detector chips. The multiple first and second beam splitters split one output beam into three output beams with balanced power distribution, and can accept multiple input beams. This is equivalent to integrating three light sources, three couplers, and three detectors in the existing technology, realizing the miniaturization and integration of the fiber optic gyroscope and reducing costs.
[0035] This application also provides a method for monitoring the optical power of a fiber optic gyroscope multi-channel transceiver device, the method being implemented as follows: A1-A2: In step A1, the preset optical power in the fiber optic gyroscope multiplexer described in any of the above embodiments is monitored in real time. The preset optical power includes the output light generated by the light source chip, the optical power of the primary output light generated after the first beam splitter is split, the optical power of the incident light returned by the external polarizer after being reflected by the second beam splitter, and the optical power of the final incident light received by the detector chip. In step A2, when the preset optical power does not meet the preset conditions, the preset optical power is adjusted.
[0036] In one embodiment, step A2 above can be implemented as steps A21-A22: In step A21, when the preset optical power is unbalanced, the power balance is adjusted at least by adjusting the splitting ratio.
[0037] In step A22, when the preset optical power value exceeds the normal power range, the light source intensity is controlled by adjusting the driving current of the light source chip so that the preset optical power value falls within the normal power range.
[0038] In this embodiment, the beam splitting ratio can be dynamically adjusted. Traditional beam splitters achieve a specific beam splitting ratio by depositing multiple layers of antireflective and beam-splitting films on the prism surface. In this application, liquid crystal material is embedded in the film layers, and the arrangement of liquid crystal molecules is controlled by an electric field to change its refractive index, thereby achieving dynamic adjustment of the antireflective ratio. Alternatively, a thermosensitive material can be used as the antireflective or beam-splitting film. Utilizing the characteristic that the refractive index of the thermosensitive material changes with temperature, the antireflective performance can be dynamically adjusted by heating or cooling the film layers, thereby adjusting the beam splitting ratio.
[0039] In one embodiment, the method may also be implemented as follows: The operating temperature of the light source chip is adjusted by using a temperature control element to keep the operating temperature of the light source chip within the normal temperature range.
[0040] The beneficial effect of this embodiment is that controlling the operating temperature of the light source chip within the normal temperature range aims to stabilize the wavelength and power of the emitted light generated by the light source chip and avoid power fluctuations caused by temperature drift.
[0041] Those skilled in the art will understand that the embodiments of this application can be provided as methods or fiber optic gyroscope multiplexers. Obviously, those skilled in the art can make various modifications and variations to this application without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.
Claims
1. A fiber optic gyroscope multiplexer, characterized in that, include: A light source chip used to generate emitted light; Multiple first beam splitters, each first beam splitter splits the outgoing light according to a specific transmission ratio and reflection ratio, and finally outputs three primary outgoing lights of equal power through the three first beam splitters respectively; Multiple second beam splitters are used to receive the three primary output beams from the first beam splitter respectively. Each second beam splitter further splits the beams according to the same transmission and reflection ratios. The transmitted light is output as the final output beam to an external polarizer, and the reflected light is absorbed or used for system calibration to achieve a balanced distribution of optical power of the three final output beams. Multiple PD detector chips are used to receive multiple input light sources and convert them into electrical signals; The housing pins are used to power the light source chip and output the electrical signals converted by the PD detector chip.
2. The fiber optic gyroscope multiplexer as described in claim 1, characterized in that, The plurality of first beam splitters include beam splitter 1, beam splitter 3 and beam splitter 5, which are used to ensure power balance of multiple primary output beams; The beam splitter prism 1 uses a beam splitting ratio of 1 / 3 transmission and 2 / 3 reflection to split the incident light into transmitted light 1 and reflected light 2. The beam splitter prism 3 uses a beam splitting ratio of 1 / 2 transmission and 1 / 2 reflection to perform secondary beam splitting of the reflected light 2 into transmitted light 3 and reflected light 4. The beam splitter 5 uses a 100% reflective beam splitting characteristic to reflect the transmitted light 3 from the beam splitter 3 into reflected light 5.
3. The fiber optic gyroscope multiplexer as described in claim 2, characterized in that, The plurality of second beam splitters include beam splitter 2, beam splitter 4 and beam splitter 6; Beam splitters 2, 4, and 6 employ a transmission ratio of 1 / 2 and a reflection ratio of 1 / 2 to split the primary outgoing light from beam splitters 1, 3, and 5 into transmitted light and reflected light, respectively.
4. The fiber optic gyroscope multiplexer as described in claim 3, characterized in that, The output optical path of the fiber optic gyroscope multiplexer is as follows: The outgoing light first passes through beam splitter prism 1, 1 / 3 of the outgoing light is transmitted to form transmitted light 1, and 2 / 3 of the outgoing light is reflected to form reflected light 2. Transmitted light 1 enters beam splitter 2. Half of the transmitted light 1 is transmitted and coupled with the optical fiber to form the first final output light. Half of the transmitted light 1 is reflected and absorbed. The reflected light 2 enters the beam splitter 3. Half of the reflected light 2 is transmitted to form transmitted light 3, and half of the reflected light 2 is reflected to form reflected light 4. The reflected light 4 enters the beam splitter 4. Half of the reflected light 4 is transmitted and coupled with the optical fiber to form the second final output light, while the other half of the reflected light 4 is reflected and absorbed. Transmitted light 3 enters beam splitter 5, and 100% of the transmitted light 3 is reflected to form reflected light 5; The reflected light 5 enters the beam splitter 6. Half of the reflected light 5 is transmitted and coupled with the optical fiber to form the third final output light, while the other half of the reflected light 5 is reflected and absorbed.
5. The fiber optic gyroscope multiplexer as described in claim 3, characterized in that, The multiple PD detector chips receive multiple input beams through multiple second beam splitters, wherein the multiple second beam splitters guide the incident light returned by the external polarizer to the PD detector chips through a specific reflectance ratio.
6. The fiber optic gyroscope multiplexer as described in claim 5, characterized in that, The input optical path of the fiber optic gyroscope multiplexer is as follows: The input light 1 passes through the beam splitter prism 2, half of the input light 1 is transmitted, and half of the input light 1 is reflected into the PD detector chip 1. The input light 2 passes through the beam splitter 4, half of the input light 2 is transmitted, and half of the input light 2 is reflected into the PD detector chip 2. The input light 3 passes through the beam splitter 6, half of the input light 3 is transmitted, and half of the input light 3 is reflected into the PD detector chip 3.
7. The fiber optic gyroscope multiplexer as described in claim 1, characterized in that, Also includes: A collimating lens is used to collimate the outgoing light before it enters the beam splitter.
8. A method for monitoring the optical power of a fiber optic gyroscope multi-channel transceiver device, characterized in that, include: Real-time monitoring of the preset optical power in the fiber optic gyroscope multi-channel transceiver device as described in any one of claims 1-7, wherein the preset optical power includes the outgoing light generated by the light source chip, the optical power of the primary outgoing light generated after the first beam splitter is split, the optical power of the incident light returned by the external polarizer after being reflected by the second beam splitter, and the optical power of the final incident light received by the detector chip. When the preset optical power does not meet the preset conditions, the preset optical power is adjusted.
9. The method as described in claim 8, characterized in that, The step of adjusting the preset optical power when the preset optical power does not meet the preset conditions includes: When the preset optical power is unbalanced, the power balance can be adjusted at least by adjusting the splitting ratio. When the preset optical power value exceeds the normal power range, the light source intensity is controlled by adjusting the drive current of the light source chip so that the preset optical power value falls within the normal power range.
10. The method as described in claim 8, characterized in that, The method further includes: The operating temperature of the light source chip is adjusted by using a temperature control element to keep the operating temperature of the light source chip within the normal temperature range.