Integrated optical transceiver assembly for fiber-optic gyroscope, coupling method and fiber-optic gyroscope

Abstract

The invention discloses an integrated optical transceiver assembly for a fiber-optic gyroscope, a coupling method and the fiber-optic gyroscope. The integrated optical transceiver assembly for the fiber-optic gyroscope at least comprises a shell, an optical transmitting assembly, a first collimating lens, a plurality of slides, a plurality of circulators, a plurality of optical receiving assemblies and a plurality of optical fiber assemblies, wherein the optical transmitting assembly, the first collimating lens, the plurality of slides, the plurality of circulators and the plurality of optical receiving assemblies are arranged in the shell; the plurality of slides are arranged in parallel; the first collimating lens is arranged between the light emitting assembly and the slide located at the first position, and the first collimating lens can collimate a light source excited by the light emitting assembly to form parallel light beams; the circulators are arranged in a staggered mode, and each circulator is provided with a first port, a second port and a third port. The slide at the first position can transmit part of the light beam to the next slide and reflect the remaining light beam to the corresponding first port; and the glass slide at the tail position can reflect all the received light beams to the corresponding first port. Integrated design is achieved, the size and weight are reduced, insertion loss is small, and the integration level is high.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber optic gyroscopes, and particularly to an integrated optical transceiver assembly, a coupling method and a fiber optic gyroscope for a fiber optic gyroscope. Background Art

[0002] A fiber optic gyroscope is an optical technology-based gyroscope used to measure angular velocity and direction. It utilizes the influence of optical effects on the propagation of light in an optical fiber to achieve measurement. According to the special theory of relativity, when light travels along an optical fiber loop path, it will be affected by the "Sagnac effect". Briefly, when light in a closed loop travels in one direction, it will be affected by the interference caused by the rotation of the loop itself. This interference causes a change in the propagation speed of light, resulting in a relative phase difference, and further causing a change in the interference intensity of the light beam. By measuring this change in interference intensity, the rotation speed of the optical fiber loop can be inferred.

[0003] For a multi-axis fiber optic gyroscope, such as a three-axis fiber optic gyroscope, based on the working principle of the law of conservation of angular momentum, measurements are carried out on three axes of the X-axis, Y-axis, and Z-axis respectively to determine the rotation angle of an object. Refer to Figure 1 , the overall optical path structure principle is as follows: A laser excites a light source, the light source passes through a 1x3 fiber optic coupler and is divided into three light beams, each light beam is input into a 2x2 fiber optic coupler and divided into two paths of light. The two paths of light are transmitted along different directions through a fiber optic depolarizer respectively, and then return through a Y waveguide and an optical fiber loop to the coupler, where they are received by a detector and converted into electrical signals. By analyzing the change in the electrical signal, the rotation speed and direction of the optical fiber loop can be calculated. Summary of the Invention

[0004] In order to achieve the integrated design of a fiber optic gyroscope, with the aims of high integration, reduced overall volume and weight, the present invention provides an integrated optical transceiver assembly, a coupling method and a fiber optic gyroscope for a fiber optic gyroscope.

[0005] In a first aspect, an embodiment of the present invention provides an integrated optical transceiver assembly for a fiber optic gyroscope, which at least includes a housing, a light emitting assembly, a first collimating lens, a plurality of glass slides, a plurality of circulators, a plurality of light receiving assemblies disposed within the housing, and a plurality of fiber optic assemblies disposed at the light output port of the housing;

[0006] The plurality of glass slides, the plurality of circulators, the plurality of light receiving assemblies, and the plurality of fiber optic assemblies correspond one by one;

[0007] The plurality of glass slides are arranged in parallel;

[0008] The first collimating lens is disposed between the light emitting component and the first glass slide in sequence. The first collimating lens can collimate the light source excited by the light emitting component to form a parallel light beam;

[0009] The plurality of circulators are arranged staggeredly, and each circulator is provided with a first port, a second port and a third port;

[0010] The first port is arranged corresponding to the glass slide;

[0011] The second port is arranged corresponding to the optical fiber component;

[0012] The third port is arranged corresponding to the light receiving component;

[0013] The first glass slide in sequence can transmit part of the light beam to the next glass slide and reflect the remaining light beam to the corresponding first port; the last glass slide in sequence can reflect all the received light beam to the corresponding first port;

[0014] The optical fiber component can return and transmit the received light beam to the corresponding second port and transmit it to the corresponding light receiving component through the corresponding third port.

[0015] Optionally, the proportion of the light beam that any glass slide can transmit to the original light beam is:

[0016] (n - i) / n

[0017] The proportion of the light beam that any glass slide can reflect to the original light beam is:

[0018] 1 / n

[0019] Wherein, n is the number of all the glass slides, and i is the arrangement order of the corresponding glass slide.

[0020] Optionally, the integrated optical transceiver component for the fiber optic gyroscope further includes a TEC cooler disposed in the housing;

[0021] The light emitting component, the first collimating lens, the plurality of glass slides, the plurality of circulators and the plurality of light receiving components are disposed on the cold surface of the TEC cooler.

[0022] Optionally, the integrated optical transceiver component for the fiber optic gyroscope further includes a thermistor disposed close to the light emitting component.

[0023] Optionally, the light receiving component includes a second collimating lens and a detector chip;

[0024] The second collimating lens is disposed between the detector chip and the corresponding third port.

[0025] Optionally, the optical fiber component includes a third collimating lens and an optical fiber body which are coupled to each other;

[0026] The third collimating lens is disposed close to the housing, and the third collimating lens and the corresponding second port are on the same straight line.

[0027] Optionally, the integrated optical transceiver component for the fiber optic gyroscope further includes a plurality of prisms disposed in the housing;

[0028] The plurality of prisms are disposed corresponding to the second ports, and are disposed between the second ports and the third collimating lens, and each prism and the corresponding second port and the third collimating lens are on the same straight line.

[0029] Optionally, the distance between the first collimating lens and the optical transmitting component is consistent with the focal length of the first collimating lens.

[0030] In a second aspect, an embodiment of the present invention provides a coupling method for an integrated optical transceiver component for a fiber optic gyroscope. Each optical receiving component includes a second collimating lens and a detector chip;

[0031] Each optical fiber component includes a third collimating lens and an optical fiber body;

[0032] The coupling method for the integrated optical transceiver component for the fiber optic gyroscope includes:

[0033] Fix the optical transmitting component, each glass slide, each detector chip and each circulator at preset positions in the housing;

[0034] Place the first collimating lens between the optical transmitting component and the first glass slide in the queue, start the optical transmitting component, and monitor the spot size at the light outlet of the housing. Adjust the position of the first collimating lens until the spot reaches the minimum, and then fix the first collimating lens;

[0035] Place one of the third collimating lenses and the optical fiber body at the light outlet of the housing, start the optical transmitting component, monitor the optical power of the optical fiber body in real time, adjust the position of the optical fiber body until the optical power reaches the maximum value, fix the optical fiber body, and finely adjust the third collimating lens to make the optical power reach the maximum value. Couple the third collimating lens and the optical fiber body, and perform curing and baking;

[0036] Repeat the above coupling process for the remaining third collimating lenses and optical fiber bodies in sequence, and perform curing and baking;

[0037] Place one of the second collimating lenses between the corresponding detector chip and the third port of the circulator. Connect a light source to the output port of the corresponding optical fiber body. Start the detector chip and monitor the response current of the detector chip. Adjust the second collimating lens until the response current reaches a preset value. The second collimating lens is coupled to the detector chip, and then fix the second collimating lens.

[0038] Repeat the above coupling process for the remaining second collimating lenses and detector chips in sequence, and fix the second collimating lenses.

[0039] In a third aspect, an embodiment of the present invention provides an optical fiber gyroscope, which includes the integrated optical transceiver component for the optical fiber gyroscope described in the first aspect.

[0040] The beneficial effects of the above technical solutions provided in the embodiments of the present invention at least include:

[0041] An embodiment of the present invention provides an integrated optical transceiver component for an optical fiber gyroscope. An optical transmitting component, a first collimating lens, a plurality of glass slides, a plurality of circulators, and a plurality of optical receiving components are arranged in a housing to form an integrated design, which reduces the volume and weight, can effectively simplify the assembly process, improves the assembly efficiency, and has the characteristics of small insertion loss and high integration. At the same time, the integrated design can reduce the loss and interference of the optical path, and improve the measurement accuracy and stability.

[0042] The plurality of glass slides are arranged in parallel, and the plurality of glass slides are all inclined relative to the first collimating lens, and the first port of the circulator is correspondingly arranged with the glass slides. The optical transmitting component excites a light source, and the light source is collimated by the first collimating lens to form a parallel light beam. The first glass slide and the intermediate glass slides can transmit part of the light beam to the next glass slide and reflect the remaining light beam to the corresponding first port, and the last glass slide can reflect all the received light beam to the corresponding first port. Through the arranged glass slides, the precise distribution and reflection of the light beam are realized, and the light beam is transported to different circulators to be distributed to different optical paths. Each optical path corresponds to a specific measurement direction, and the purpose of multi-axis measurement is achieved, and the function of a multi-axis optical fiber gyroscope can be realized.

[0043] Other features and advantages of the present invention will be described in the following specification, and, in part, will become apparent from the specification or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the written specification and the drawings.

[0044] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0045] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings:

[0046] Figure 1 is a schematic structural diagram of an existing fiber optic gyroscope provided in an embodiment of the present invention;

[0047] Figure 2 is a schematic structural diagram of an integrated optical transceiver module for a fiber optic gyroscope provided in an embodiment of the present invention;

[0048] Figure 3 is a flowchart of the coupling of an integrated optical transceiver module for a fiber optic gyroscope provided in an embodiment of the present invention;

[0049] Description of reference numerals:

[0050] 1, housing; 2, optical transmitting module; 3, first collimating lens; 4, glass sheet; 5, circulator; 6, optical receiving module; 61, second collimating lens; 62, detector chip; 7, fiber optic module; 71, third collimating lens; 72, fiber optic body; 8, TEC cooler; 9, thermistor; 10, prism; 11, fiber optic spacer. Detailed implementation manners

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] The inventor found that in existing multi-axis fiber optic gyroscopes, such as three-axis fiber optic gyroscopes, usually three single-axis fiber optic gyroscopes are combined together, and each single-axis fiber optic gyroscope requires independent packaging and connection, which leads to an increase in the overall volume. When combining three single-axis fiber optic gyroscopes into a three-axis fiber optic gyroscope, it is necessary to ensure the precise alignment and connection of each single-axis fiber optic gyroscope during the assembly process, increasing the complexity and cost of the assembly.

[0055] To solve the above problems, through research and development, the inventor proposed an integrated optical transceiver component, a coupling method, and a fiber optic gyroscope for a fiber optic gyroscope, which can realize the integrated design of the fiber optic gyroscope, with high integration, achieving the purpose of reducing the overall volume and weight.

[0056] Embodiment 1

[0057] Refer to Figure 2 , this embodiment proposes an integrated optical transceiver component for a fiber optic gyroscope. The integrated optical transceiver component includes a housing 1, and an optical transmitting component 2, a first collimating lens 3, a plurality of glass slides 4, a plurality of circulators 5, and a plurality of optical receiving components 6 are integrally arranged in the housing 1. A plurality of fiber optic components 7 are provided at the light output port of the housing 1. The number of the glass slides 4, the circulators 5, the optical receiving components 6, and the fiber optic components 7 is the same, and the plurality of glass slides 4, the plurality of circulators 5, the plurality of optical receiving components 6, and the plurality of fiber optic components 7 correspond to each other one by one. The plurality of glass slides 4 are arranged in parallel. The first collimating lens 3 is arranged between the optical transmitting component 2 and the first glass slide 4 in the front, that is, the glass slide 4 close to the optical transmitting component 2 is used as the first glass slide 4 (that is, Figure 2 the leftmost glass slide 4 in Figure 2 ), and all the glass slides 4 are sorted in sequence with this first glass slide 4. The glass slide 4 at the end (that is,

[0058] In use, the emission optical path is as follows: The optical emission component 2 excites a light source, and the light source is collimated by the first collimating lens 3 to form a parallel light beam; this light beam is transmitted in the form of free-space optical transmission to the glass slide 4, and the glass slide 4 can transmit and reflect this light beam. Specifically, when there are two or more glass slides 4 in the integrated optical transceiver component, the first glass slide 4 transmits part of the light beam to the next glass slide 4 and reflects the remaining light beam to the corresponding first port; the intermediate glass slides 4 transmit part of the received light beam to the next glass slide 4 and reflect the remaining light beam to the corresponding first port; and so on until the light beam is transmitted to the last glass slide 4, and the last glass slide 4 can reflect all the received light beam to the corresponding first port. When there are only two glass slides 4 in the integrated optical transceiver component, the first glass slide 4 transmits part of the light beam to the next glass slide 4 (i.e., the last glass slide 4) and reflects the remaining light beam to the corresponding first port; the last glass slide 4 reflects all the received light beam to the corresponding first port. Each circulator 5 transmits the light beam received at the first port to the second port, and the second port transmits this light beam to the corresponding optical fiber component 7. Here, the circulator 5 plays a role in beam splitting and guiding to ensure that the light beam can be transmitted along a predetermined path.

[0059] The reception optical path is as follows: The optical fiber component 7 returns and transmits the received light beam to the corresponding second port and is transmitted by the corresponding third port to the corresponding optical reception component 6.

[0060] By setting the glass slide 4, precise distribution and reflection of the light beam can be achieved, and the light beam can be delivered to different circulators 5 to be distributed to different optical paths. Each optical path corresponds to a specific measurement direction, and since the multiple circulators 5 are staggeredly arranged, it is ensured that no interference is formed between the circulators 5 to avoid crosstalk between different optical paths. When the integrated optical transceiver component of this embodiment is arranged in a fiber optic gyroscope, when the fiber optic gyroscope rotates, a corresponding phase shift will occur to the light beam in the optical path. By detecting this phase shift, the angular velocity of the fiber optic gyroscope can be measured, achieving the purpose of multi-axis measurement and enabling the function of a multi-axis fiber optic gyroscope.

[0061] Existing multi-axis fiber optic gyroscopes generally achieve corresponding functions through fiber splicing structures, and optical fibers are easily affected by temperature changes, which will affect stability and accuracy. In the integrated optical transceiver component of this embodiment, the optical elements are not spliced by optical fibers but use free-space optical transmission, which can effectively avoid the problems of a large number of fusion splices, high loss, and low coupling efficiency in the fiber optic gyroscopes of the prior art.

[0062] Compared with existing multi-axis fiber optic gyroscopes, the integrated optical transceiver component of this embodiment integrates multiple optical elements into the housing 1. The integrated design reduces the volume and weight; it can effectively simplify the assembly process, improve the assembly efficiency, and has the characteristics of low insertion loss and high integration; at the same time, the integrated design can reduce the loss and interference of the optical path, and improve the measurement accuracy and stability.

[0063] Of course, integrating multiple optical elements into a housing 1 also has the following advantages: making the entire integrated optical transceiver component a whole unit, achieving the effect of optimizing the overall performance and facilitating calibration and testing; helping to reduce the influence of external electromagnetic interference on the optical elements in the housing 1, thereby maintaining the purity and stability of the signal and achieving a compact structure; making the relative positions of the optical elements more stable, reducing the coupling error caused by the relative movement or misalignment between the optical elements; the compact structure helps to reduce the overall size, reduce the interference of the external environment on the internal components, and thus improve the stability of the system; the centralized design allows for more precise control of the thermal characteristics of the housing 1, such as thermal conductivity, density, and specific heat capacity, thereby optimizing the thermal stability. A stable temperature environment is crucial for reducing thermal noise and temperature drift, which are important factors affecting the coupling effect; the connection and cooperation between the optical elements are optimized in the centralized housing 1, reducing the risk of failure caused by poor connection or improper cooperation, and thus improving the reliability of the entire integrated optical transceiver component.

[0064] In a specific embodiment, referring to Figure 2 , the proportion of the light beam that any glass slide 4 can transmit in the original light beam is:

[0065] (n - i) / n

[0066] The proportion of the light beam that any glass slide 4 can reflect in the original light beam is:

[0067] 1 / n

[0068] where n is the total number of glass slides 4, and i is the arrangement order of the corresponding glass slide 4.

[0069] Taking the setting of three glass slides 4 as an example for illustration, the light source excited by the light emitting component 2 is collimated by the first collimating lens 3. The formed light beam (i.e., the above-mentioned original light beam) passes through the first glass slide 4. The first glass slide 4 can transmit 2 / 3 of the light beam to the next glass slide 4 and reflect 1 / 3 of the light beam to the first port of the corresponding circulator 5. The second glass slide 4 divides the received light beam into two parts, can transmit 1 / 3 of the original light beam to the next glass slide 4, and reflect 1 / 3 of the light beam to the first port of the corresponding circulator 5. The third glass slide 4 reflects all the received light beam to the first port of the corresponding circulator 5. Since the proportion of the light beam that each glass slide 4 can reflect is consistent, the attribute values (such as light intensity) of the formed light beams are consistent. Based on each light beam for multi-axis measurement, variables in the measurement process are removed, ensuring the accuracy of the measurement.

[0070] In a specific embodiment, referring to Figure 2 , the light emitting component 2, the first collimating lens 3, and multiple glass slides 4 are all on the same straight line, and the incident angles of multiple glass slides 4 are all set to 45°. That is, the angle between the parallel light beam formed after being collimated by the first collimating lens 3 and the normal of the incident surface of the glass slide 4 is 45°, and the angle between the transmitted light beam and the reflected light beam of the glass slide 4 is 90°. Based on the above setting methods of each optical element, referring to Figure 2 , the light emitting component 2 and the first collimating lens 3 can be set in the upper left corner of the housing 1, multiple glass slides 4 are arranged close to the upper side of the housing 1, the circulator 5 is set in the middle position of the housing 1, the light receiving component 6 is arranged close to the left side of the housing 1, and a light outlet is opened on the right side of the housing 2, which can effectively optimize the internal space of the housing 1, make the structure of the whole integrated optical transceiver component more compact, with high integration, achieving the purpose of reducing the overall volume and weight. In order to match the optical path height between the light emitting component 2, the first collimating lens 3, and multiple glass slides 4, corresponding height-matching pads (not marked in the figure) can be set at the bottom of the light emitting component 2 as required.

[0071] In a specific embodiment, referring to Figure 2 , there are also pins (not shown in the figure) in the housing 1, and the pins are electrically connected to external circuits and devices. The light emitting component 2 can be set on one side close to the pins, which can facilitate the connection between the light emitting component 2 and external circuits and devices, improve the convenience of assembly and connection. At the same time, it can reduce the loss and interference of external circuits and devices during the long transmission process, and improve the transmission efficiency. When the light emitting component 2 is working, it will generate a certain amount of heat. Setting the light emitting component 2 on one side close to the pins can better perform thermal management, and export the heat through the pins to prevent the light emitting component 2 from overheating.

[0072] In a specific embodiment, referring to Figure 2, the integrated optical transceiver module further includes a TEC cooler 8 disposed in the housing 1. On the cold surface of the TEC cooler 8, there are an optical transmitting component 2, a first collimating lens 3, a plurality of glass slides 4, a plurality of circulators 5, and a plurality of optical receiving components 6. The TEC cooler 8 can generate a refrigerating effect on the cold surface through the Peltier effect, so as to control the operating temperatures of optical components such as the optical transmitting component 2, the first collimating lens 3, the glass slides 4, the circulator 5, and the optical receiving component 6, ensuring that their operating temperatures are within the set thresholds, so as to ensure the stability of the performance of the entire integrated optical transceiver module and the accuracy of detection.

[0073] In a specific embodiment, refer to Figure 2 , the integrated optical transceiver module further includes a thermistor 9 disposed close to the optical transmitting component 2. Since the optical transmitting component 2 generates heat during operation, if the heat cannot be dissipated in time, the temperature of the optical transmitting component 2 will exceed the set threshold, resulting in the wavelength of the light beam excited by the optical transmitting component 2 not meeting the requirements of stability and accuracy. Therefore, a thermistor 9 can be disposed at a position close to the optical transmitting component 2, and the output signal of the thermistor 9 is connected to the TEC cooler 8, which can realize the automation of temperature monitoring and control, and improve the accuracy and efficiency of temperature control, so as to ensure that the optical transmitting component 2 is always in a suitable temperature environment, so as to ensure the stability of the performance of the optical transmitting component 2 and the accuracy of detection.

[0074] In a specific embodiment, refer to Figure 2 , the optical receiving component 6 includes a second collimating lens 61 and a detector chip 62. The second collimating lens 61 is disposed between the detector chip 62 and the corresponding third port. The optical fiber assembly 7 transmits the returned light beam, and the light beam is sequentially transmitted to the second collimating lens 61 through the second port and the third port of the circulator 5. After being collimated by the second collimating lens 61, the collimated light beam is transmitted to the corresponding optical receiving component 6. The collimated light beam can be transmitted more uniformly on the detector chip 62, thereby improving the light beam receiving efficiency and the sensitivity of the detector.

[0075] In a specific embodiment, refer to Figure 2 , the optical fiber assembly 7 includes a third collimating lens 71 and an optical fiber body 72, and these two parts are coupled to each other to ensure the light beam transmission efficiency and quality. The third collimating lens 71 is disposed close to the housing 1. The main function of the third collimating lens 71 is to collimate the light beam transmitted from the second port of the circulator 5, and the collimated light beam is transmitted into the optical fiber body 72. Since the light beam will be transmitted over a long distance in the optical fiber body 72, collimating the light beam by the third collimating lens 71 can adjust the divergent light beam into a parallel light beam, which is beneficial to reducing the transmission loss caused by the divergence of the light beam, achieving the purpose of improving the light beam transmission efficiency, and ensuring the stable and efficient transmission of the light beam in the optical fiber body 72.

[0076] In a specific embodiment, refer to Figure 2 , the optical fiber assembly 7 further includes an optical fiber spacer block 11. After coupling the above-mentioned third collimating lens 71 and the optical fiber body 72, they are fixed on the optical fiber spacer block 11, and the optical fiber spacer block 11 is fixed to the housing 1. By providing the optical fiber spacer block 11, the stability of the positions of the third collimating lens 71 and the optical fiber body 72 can be maintained, and the stability of the optical path propagation can be maintained.

[0077] In a specific embodiment, refer to Figure 2 , the integrated optical transceiver assembly further includes a plurality of prisms 10 provided in the housing 1. The plurality of prisms 10 are arranged corresponding to the second port, and are arranged between the second port and the third collimating lens 71, and each prism 10 and the corresponding second port and the third collimating lens 71 are on the same straight line, so as to keep the light beam transmitted in the form of parallel light, effectively reducing the loss. Of course, during the transmission of the light beam, the situation of light beam divergence will inevitably occur. By the total internal reflection of the prism 10 to change the transmission direction of the light beam, the divergent light beam can be refocused into a parallel light beam, so as to accurately guide the light beam to the third collimating lens 71, achieving the purpose of accurately adjusting the optical path and reducing the loss of the light beam, ensuring the continuity and stability of the light beam during the transmission process, and effectively improving the signal-to-noise ratio and measurement accuracy of the integrated optical transceiver assembly.

[0078] In a specific embodiment, refer to Figure 2 , the distance between the first collimating lens 3 and the light emitting component 2 is consistent with the focal length of the first collimating lens 3, ensuring that the light source excited by the light emitting component 2 can form a parallel light beam after passing through the first collimating lens 3, thereby minimizing the divergence and loss of the light source during the transmission process. On the basis of ensuring the performance of the first collimating lens 3 and the light emitting component 2, select the first collimating lens 3 with as small a focal length as possible to reduce the distance between the first collimating lens 3 and the light emitting component 2, making the layout of the entire integrated optical transceiver assembly more compact, which helps to reduce the volume and weight of the housing 1 and reduce the cost.

[0079] Embodiment 2

[0080] Based on the same inventive concept, refer to Figure 3 , this embodiment proposes a coupling method for an integrated optical transceiver assembly for an optical fiber gyroscope, which may specifically include the following steps:

[0081] Step S1, fixing the light emitting component, each glass sheet, each detector chip and each circulator at preset positions in the housing.

[0082] Step S2: Place the first collimating lens between the light emitting component and the first glass slide in sequence. Start the light emitting component, monitor the spot size at the light outlet of the housing, adjust the position of the first collimating lens until the spot reaches the minimum, and then fix the first collimating lens.

[0083] In the above step S2, a spot coupling machine platform can be set at the light outlet of the housing, and the spot coupling machine platform is used to monitor the spot size.

[0084] Step S3: Place one of the third collimating lenses and the optical fiber body at the light outlet of the housing. Start the light emitting component, monitor the optical power of the optical fiber body in real time, adjust the position of the optical fiber body until the optical power reaches the maximum value, fix the optical fiber body, finely adjust the third collimating lens to make the optical power reach the maximum value, couple the third collimating lens and the optical fiber body, and perform curing baking.

[0085] In the above step S3, an optical power meter can be connected to the output port of the optical fiber body, and the optical power meter is used to monitor the optical power of the optical fiber body in real time.

[0086] Step S4: Repeat the coupling process of the above step S3 for the remaining third collimating lenses and optical fiber bodies in sequence, and perform curing baking.

[0087] Step S5: Place one of the second collimating lenses between the corresponding detector chip and the third port of the circulator. Connect a light source to the output port of the corresponding optical fiber body, start the detector chip and monitor the response current of the detector chip, adjust the second collimating lens until the response current reaches a preset value, couple the second collimating lens and the detector chip, and fix the second collimating lens.

[0088] In the above step S5, the preset value is related to the coupling efficiency of the second collimating lens, and the preset value is set as the product of the current of the light source and the coupling efficiency of the second collimating lens.

[0089] Step S6: Repeat the coupling process of the above step S5 for the remaining second collimating lenses and detector chips in sequence, and fix the second collimating lens.

[0090] Embodiment III

[0091] Based on the same inventive concept, this embodiment provides an optical fiber gyroscope, which includes the integrated optical transceiver component for the optical fiber gyroscope in Embodiment I.

[0092] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. The present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An integrated optical transceiver component for an optical fiber gyroscope, characterized in that, It includes at least a housing, an optical emission component, a first collimating lens, a plurality of glass slides, a plurality of circulators, a plurality of optical receiving components disposed within the housing, and a plurality of optical fiber components disposed at the light outlet of the housing; The plurality of glass slides, the plurality of circulators, the plurality of optical receiving components, and the plurality of optical fiber components correspond to each other one by one; The plurality of glass slides are arranged in parallel; The first collimating lens is disposed between the optical emission component and the first glass slide in the first position. The first collimating lens can collimate the light source excited by the optical emission component to form a parallel light beam; The plurality of circulators are arranged staggeredly, and each circulator is provided with a first port, a second port, and a third port; The first port is correspondingly arranged with the glass slide; The second port is correspondingly arranged with the optical fiber component; The third port is correspondingly arranged with the optical receiving component; The glass slide in the first position can transmit part of the light beam to the next glass slide and reflect the remaining light beam to the corresponding first port; the glass slide in the last position can reflect all the received light beam to the corresponding first port; The optical fiber component can return the received light beam and transmit it to the corresponding second port, and transmit it to the corresponding optical receiving component through the corresponding third port.

2. The integrated optical transceiver module for an optical fiber gyroscope according to claim 1, wherein The proportion of the light beam that any glass slide can transmit to the original light beam is: (n - i) / n The proportion of the light beam that any glass slide can reflect to the original light beam is: 1 / n Wherein, n is the number of all the glass slides, and i is the arrangement order of the corresponding glass slide.

3. The integrated optical transceiver component for an optical fiber gyroscope according to claim 2, wherein, It further includes a TEC cooler disposed within the housing; The optical emission component, the first collimating lens, the plurality of glass slides, the plurality of circulators, and the plurality of optical receiving components are disposed on the cold surface of the TEC cooler.

4. The integrated optical transceiver component for an optical fiber gyroscope according to claim 3, characterized in that, It further includes a thermistor disposed close to the optical emission component.

5. The integrated optical transceiver component for an optical fiber gyroscope according to any one of claims 1-4, characterized in that, The optical receiving component includes a second collimating lens and a detector chip; The second collimating lens is disposed between the detector chip and the corresponding third port.

6. The integrated optical transceiver component for an optical fiber gyroscope according to claim 5, wherein The optical fiber component includes a third collimating lens and an optical fiber body that are coupled to each other; The third collimating lens is disposed close to the housing, and the third collimating lens is on the same straight line as the corresponding second port.

7. The integrated optical transceiver module for an optical fiber gyroscope according to claim 6, wherein, It further includes a plurality of prisms disposed within the housing; The plurality of prisms are correspondingly arranged with the second ports, are disposed between the second ports and the third collimating lenses, and each prism is on the same straight line as the corresponding second port and the third collimating lens.

8. The integrated optical transceiver component for an optical fiber gyroscope according to claim 1, characterized in that, The distance between the first collimating lens and the optical emission component is consistent with the focal length of the first collimating lens.

9. A coupling method for an integrated optical transceiver component used in an optical fiber gyroscope, characterized in that, Each optical receiving component includes a second collimating lens and a detector chip; Each optical fiber component includes a third collimating lens and an optical fiber body; The coupling method of the integrated optical transceiver component for a fiber optic gyroscope includes: Fixing the optical emission component, each glass slide, each detector chip, and each circulator at preset positions within the housing; Place the first collimating lens between the light emitting component and the first glass slide in sequence. Start the light emitting component and monitor the spot size at the light output port of the housing. Adjust the position of the first collimating lens until the spot reaches the minimum, and then fix the first collimating lens. Place one of the third collimating lenses and the optical fiber body at the light output port of the housing. Start the light emitting component and monitor the optical power of the optical fiber body in real time. Adjust the position of the optical fiber body until the optical power reaches the maximum value, then fix the optical fiber body. Fine-tune the third collimating lens to make the optical power reach the maximum value. Couple the third collimating lens and the optical fiber body and perform curing baking. Repeat the above coupling process for the remaining third collimating lenses and optical fiber bodies in sequence, and perform curing baking. Place one of the second collimating lenses between the corresponding detector chip and the third port of the circulator. Connect a light source to the output port of the corresponding optical fiber body. Start the detector chip and monitor the response current of the detector chip. Adjust the second collimating lens until the response current reaches a preset value. Couple the second collimating lens and the detector chip and fix the second collimating lens. Repeat the above coupling process for the remaining second collimating lenses and detector chips in sequence, and fix the second collimating lens.

10. An optical fiber gyroscope, characterized in that, Comprising the integrated optical transceiver component for an optical fiber gyroscope according to any one of claims 1-8.

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