CN116793329A - Optical transceiver integrated module for interference type optical fiber gyro - Google Patents
Optical transceiver integrated module for interference type optical fiber gyro Download PDFInfo
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- CN116793329A CN116793329A CN202311019778.2A CN202311019778A CN116793329A CN 116793329 A CN116793329 A CN 116793329A CN 202311019778 A CN202311019778 A CN 202311019778A CN 116793329 A CN116793329 A CN 116793329A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 42
- 239000013307 optical fiber Substances 0.000 title claims description 27
- 230000008878 coupling Effects 0.000 claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 5
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 5
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000005476 soldering Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses an optical transceiver integrated module for an interference type fiber-optic gyroscope, which comprises a light source assembly, a lens group, a photoelectric detector and a shell. The light source component comprises an SLD chip, a thermistor and a semiconductor refrigerator; the lens group comprises a double-focus double-convex cylindrical lens, a beam splitting prism, a self-focusing lens and a plano-convex lens; the double-focus double-convex cylindrical lens is formed by integrally forming a first cylindrical lens and a second cylindrical lens; the dual-focal-length biconvex cylindrical lens is used for collimating light beams emitted by the SLD chip; light emitted by the SLD chip sequentially passes through the double-focus double-convex cylindrical lens, the beam splitting prism and the self-focusing lens; the plano-convex lens is arranged on a reflection light path of the return light after being split by the beam splitting prism, and a light receiving surface of the photoelectric detector is arranged in a focal length range of the plano-convex lens. After the light emitted by the SLD chip is collimated and shaped by the double-focal-length double-convex cylindrical lens, the high-quality collimated light beam can be obtained, and the advantages of high coupling light splitting efficiency and high signal to noise ratio are achieved.
Description
Technical Field
The invention relates to the technical field of optoelectronic devices, in particular to an optical transceiver integrated module for an interference type fiber-optic gyroscope.
Background
The fiber optic gyroscope is an inertial sensor for measuring angular velocity based on Sagnac effect, and has the advantages of quick start, large dynamic range, good anti-vibration impact performance, small electromagnetic influence and the like, and the precision range of the fiber optic gyroscope covers tactical level, navigation level to precision level. The method is widely applied to the fields of aerospace, autopilot, unmanned aerial vehicle, ship navigation, robots and the like, and has great development space and wide market prospect. The fiber optic gyroscope can be divided into an interference fiber optic gyroscope, a resonant fiber optic gyroscope and a stimulated Brillouin scattering fiber optic gyroscope according to the working principle. The optical path structure of the interference type optical fiber gyroscope can be divided into an optical transceiver module consisting of a light source, a photoelectric detector and an optical coupler and a sensitive module consisting of a Y waveguide and an optical fiber ring.
The optical transceiver module for the fiber-optic gyroscope in the prior art mainly has two design schemes: one proposal is an optical device for an optical fiber gyroscope, which comprises a butterfly tube shell, a temperature control module and a light source coupling output module, wherein the temperature control module and the light source coupling output module are positioned in the butterfly tube shell. The light source coupling output module includes: the optical fiber array comprises an SLD chip, a chip carrier, a lens, an isolation core, a planar waveguide chip, an optical fiber array and N detectors, wherein the SLD chip is fixed on the chip carrier; the planar waveguide chip is designed for light splitting, and light emitted by the SLD chip sequentially passes through the lens and the isolation core and then enters a first port serving as a first end face of the input end on the planar waveguide chip, and the optical detector is correspondingly connected with other ports except the first port of the first end face of the planar waveguide chip. The planar waveguide chip manufactured by the scheme has the difficulties of high processing precision requirement and complex production process.
Another proposal is a miniaturized light receiving and transmitting integrated module of a single lens, which comprises a light source, a detector and an aspheric lens. The light source is a super-radiation light-emitting diode light source; the aspheric lens is designed to realize the light beam emission and coupling beam splitting of the converging light source, the front end face of the aspheric lens is a focusing lens, and the rear end face of the aspheric lens is an inclined end face plated with a semi-transparent semi-reflective film. And determining the focal length of the front end face of the focusing lens according to the refractive index of the aspheric lens and the distance between the light source and the end face of the tail fiber, so that divergent light output by the light source can be converged to the end face of the tail fiber and is within the receiving aperture of the tail fiber. The tilt angle of the tilted end face is precisely calculated to meet the requirement of being able to separate the transmitted light beam from the reflected light beam of the return light beam from the pigtail while total reflection does not occur. What is needed is an improvement that does not collimate and shape the beam emitted by the SLD chip.
Disclosure of Invention
The invention aims to provide an optical transceiver integrated module for an interference type optical fiber gyro, which solves the problems of high processing precision requirement and complex production process in the prior art for manufacturing a planar waveguide chip and the technical problem that a single-lens miniaturized optical transceiver integrated module does not collimate and reshape a light beam emitted by an SLD chip.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the optical transceiver integrated module for the interference type optical fiber gyro comprises a light source assembly, a lens group, a photoelectric detector and a shell;
the light source component comprises an SLD chip, a thermistor and a semiconductor refrigerator;
the lens group comprises a double-focus double-convex cylindrical lens, a beam splitting prism, a self-focusing lens and a plano-convex lens;
the double-focus double-convex cylindrical lens is formed by integrally forming a first cylindrical lens and a second cylindrical lens; the dual focal length lenticular lens is used for collimating the light beam emitted by the SLD chip, wherein: the first cylindrical lens of the double-focus double-convex cylindrical lens is used for collimating the light beam with larger divergence angle in the vertical plane, and the second cylindrical lens of the double-focus double-convex cylindrical lens is used for collimating the light beam with smaller divergence angle in the horizontal plane;
the light emitted by the SLD chip sequentially passes through a double-focus double-convex cylindrical lens, a beam splitting prism and a self-focusing lens, wherein the main optical axes of the double-focus double-convex cylindrical lens, the beam splitting prism and the self-focusing lens are on the same straight line; the optical transceiver module is connected with the optical fiber tail fiber through the self-focusing lens, so that the optical interaction between the optical transceiver module and the optical fiber gyro sensitive module consisting of the Y waveguide and the optical fiber ring is realized;
the plano-convex lens is arranged on a reflection light path after the return light is split by the beam splitter prism; the light receiving surface of the photoelectric detector is arranged in the focal length range of the plano-convex lens; light returned from the fiber optic gyroscope sensitive module is converted into parallel light through the self-focusing lens, and the parallel light is reflected after being split by the splitting prism, and is received by the photoelectric detector after being incident from the convex surface of the plano-convex lens;
the inner wall of the shell is formed with a light source base with a ladder structure and a coupling light splitting substrate, the light source base is an uploading object plane, and the coupling light splitting substrate is a downloading object plane; the SLD chip and the thermistor are arranged on a semiconductor refrigerator through a heat sink, and the semiconductor refrigerator is welded and fixed on a light source base; the double-focus double-convex cylindrical lens, the beam splitting prism, the plano-convex lens and the photoelectric detector are all arranged on the coupling beam splitting substrate;
the shell also comprises a plurality of pins, wherein the pins are used for connecting an external circuit with the SLD chip, the thermistor, the semiconductor refrigerator and the photoelectric detector.
Further, the double-focus double-convex cylindrical lens is installed and fixed on the coupling beam-splitting substrate by adopting a U-shaped groove bracket.
Further, both convex surfaces of the double-focus double-convex cylindrical lens are plated with an antireflection film.
Further, the transmission-reflection splitting ratio of the splitting prism is 50%:50%; the incident surface and the emergent surface of the beam-splitting prism are coated with an antireflection film.
Further, the beam splitting prism is welded on the coupling beam splitting substrate through the fixing seat.
Further, the plane and the convex surface of the plano-convex lens are plated with an antireflection film.
Further, the plano-convex lens and the photoelectric detector are respectively arranged at two ends of the fixed sleeve, and the fixed sleeve is welded on the coupling beam-splitting substrate through the bracket.
Further, the self-focusing lens is arranged in a gold-plated tube of the optical fiber collimator, and the gold-plated tube of the optical fiber collimator is welded in a tail hole of the shell.
Further, the heat sink is an aluminum nitride ceramic substrate.
Further, the external circuit comprises an automatic temperature control circuit, a constant current driving circuit and a signal processing circuit; the automatic temperature control circuit and the constant current driving circuit are arranged on the circuit board; the thermistor and the semiconductor refrigerator are connected with an automatic temperature control circuit, the constant current driving circuit is connected with the SLD chip, and the photoelectric detector is connected with the signal processing circuit.
Compared with the prior art, the invention has the following beneficial effects:
1. after the light beam emitted by the SLD chip is collimated and shaped by the double-focal-length double-convex cylindrical lens, a high-quality collimated light beam can be obtained, and the advantages of high coupling light splitting efficiency and high signal to noise ratio are achieved.
2. Compared with the technical scheme of designing the planar waveguide chip for light splitting, the invention adopts the light splitting prism to split light, and adopts the self-focusing lens to realize high-precision coupling of the collimated light beam and the optical fiber pigtail after light splitting, thereby avoiding the difficulties of high processing precision requirement and complex production process existing in manufacturing the planar waveguide chip.
Drawings
FIG. 1 is a schematic diagram of the internal structure of an optical transceiver module for an interferometric fiber-optic gyroscope of the present invention;
FIG. 2 is a schematic diagram of the optical path of the integrated optical transceiver module for an interferometric fiber-optic gyroscope of the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-2, the optical transceiver module for an interferometric fiber-optic gyroscope of the present invention includes a light source assembly, a lens assembly, a photodetector and a housing.
The light source assembly includes an SLD chip 1, a thermistor 2, and a semiconductor refrigerator 3. The SLD chip 1 is a common light source of the fiber optic gyroscope because of the advantages of high output power, good coherence, wide emission spectrum, small volume, light weight and the like. The light beam emitted from the SLD chip 1 has different divergence angles in the horizontal plane and in the vertical plane, and the formed spot is elliptical. The thermistor 2 is a negative temperature coefficient thermistor, and the thermistor 2 is used for sensing the temperature change of the SLD chip 1. The SLD chip 1 and the thermistor 2 are mounted on a semiconductor refrigerator 3 through a heat sink, the semiconductor refrigerator 3 serving to keep the temperature of the SLD chip 1 constant. Optionally, the heat sink is an aluminum nitride ceramic substrate. In this embodiment, the SLD chip 1 is fixed to the aluminum nitride ceramic substrate by a soldering process, and the aluminum nitride ceramic substrate is fixed to the semiconductor refrigerator 3 by a soldering process.
The lens group comprises a double-focus double-convex cylindrical lens 4, a beam splitting prism 5, a self-focusing lens 6 and a plano-convex lens 7.
The double focal length lenticular lens 4 is integrally formed by a first cylindrical lens 41 and a second cylindrical lens 42. The dual focal length lenticular lens 4 is used to collimate the light beam emitted by the SLD chip 1, wherein: the first cylindrical lens 41 of the double-focal-length lenticular lens 4 is used for collimating a light beam having a large divergence angle in a vertical plane, and the second cylindrical lens 42 of the double-focal-length lenticular lens 4 is used for collimating a light beam having a small divergence angle in a horizontal plane. The light beam emitted from the SLD chip 1 is collimated and shaped into a circular spot by the double-focal-length lenticular lens 4.
After the light beam emitted by the SLD chip 1 passes through the double-focus double-convex cylindrical lens 4, the beam waist radius of the light beam in the horizontal plane and the vertical plane is calculated according to the propagation rule of the Gaussian light beam and the far-field divergence angle definition, and the positions of two circular light spots are obtained, so that the placement position of the double-focus double-convex cylindrical lens 4 is determined.
According to the relation among the refractive index, focal length and curvature radius of the materials used by the lens, the curvature radius of the first cylindrical lens 41 and the second cylindrical lens 42 of the double-focal-length double-convex cylindrical lens 4 can be obtained after calculation. Optionally, both convex surfaces of the dual focal length lenticular lens 4 are coated with an antireflection film.
The light emitted by the SLD chip 1 sequentially passes through the double-focus double-convex cylindrical lens 4, the beam splitting prism 5 and the self-focusing lens 6, and the main optical axes of the double-focus double-convex cylindrical lens 4, the beam splitting prism 5 and the self-focusing lens 6 are on the same straight line.
The light receiving and transmitting integrated module for the interference type optical fiber gyro adopts a beam splitting prism 5 to split light. Optionally, the ratio of the transmission to the reflection spectrum of the beam-splitting prism 5 is 50%:50%, other spectral ratios may be selected in practical use, and are not limited herein. Optionally, the incident surface and the emergent surface of the beam-splitting prism 5 are coated with an antireflection film.
The self-focusing lens 6 is also called gradient-index lens, which means a cylindrical optical lens whose refractive index distribution is graded in the radial direction, and has focusing and imaging functions. The self-focusing lens 6 can refract light transmitted along the axial direction and gradually reduce the refractive index distribution along the radial direction, so that the emergent light rays are smoothly and continuously converged to one point. When the converging light is input from one end face of the self-focusing lens 6, the converging light is converted into parallel light after passing through the self-focusing lens 6.
The optical transceiver module is connected with the optical fiber pigtail through the self-focusing lens 6, so that the optical interaction between the optical transceiver module and the optical fiber gyro sensitive module consisting of the Y waveguide and the optical fiber ring is realized. The self-focusing lens 6 is arranged in a gold-plated tube of the optical fiber collimator, and the gold-plated tube of the optical fiber collimator is welded in a tail hole of the shell.
The plano-convex lens 7 is provided on a reflection light path on which the return light is split by the splitting prism 5. Optionally, the plane and the convex surface of the plano-convex lens 7 are plated with an antireflection film.
The photodetector 8 employs a PIN photodiode for converting an optical signal into a current signal. The PIN photodiode is connected to a pre-amplifier that amplifies and converts the current signal to a voltage signal. The light receiving surface of the photodetector 8 is arranged within the focal length range of the plano-convex lens 7; the light returned from the fiber optic gyro sensor module is converted into parallel light by the self-focusing lens 6, and the parallel light is reflected by the beam splitting prism 5, and is received by the photodetector 8 after being incident from the convex surface of the plano-convex lens 7.
The inner wall of the housing 9 is formed with a light source base 10 and a coupling spectroscopic substrate 11, the light source base 10 is an uploading object plane, and the coupling spectroscopic substrate 11 is a downloading object plane. The SLD chip 1 and the thermistor 2 are mounted on the semiconductor refrigerator 3 through a heat sink, and the semiconductor refrigerator 3 is welded and fixed on the light source base 10; the double-focus double-convex cylindrical lens 4, the beam-splitting prism 5, the plano-convex lens 7 and the photodetector 8 are all arranged on the coupling beam-splitting substrate 11.
In the present embodiment, the double focal length biconvex cylindrical lens 4 is mounted and fixed on the coupling spectroscopic substrate 11 by using a U-shaped groove bracket 43; the beam splitter prism 5 is adhered to the fixing base 51 by an adhesive, and the fixing base 51 is welded to the coupling beam splitter substrate 11. The plano-convex lens 7 and the PIN photodiode are respectively arranged at two ends of the hollow sleeve 71, the plano-convex lens 7 is fixed at one end of the hollow sleeve 71 by adopting a positioning ring, and the photoelectric detector 8 is fixed at the other end of the hollow sleeve 71 by adopting a screw. The hollow sleeve 71 is welded to the coupling spectroscopic base plate 11 by a bracket.
The housing 9 further comprises a plurality of pins for connecting an external circuit with the SLD chip 1, the thermistor 2, the semiconductor refrigerator 3, and the photodetector 8.
The external circuit comprises an automatic temperature control circuit, a constant current driving circuit and a signal processing circuit; the automatic temperature control circuit and the constant current driving circuit are arranged on the circuit board; the thermistor 2 and the semiconductor refrigerator 3 are connected with an automatic temperature control circuit, the constant current driving circuit is connected with the SLD chip 1, and the photoelectric detector 8 is connected with a signal processing circuit. The automatic temperature control circuit drives the semiconductor refrigerator 3 to cool or heat, thereby controlling and stabilizing the temperature of the SLD chip 1. The constant current driving circuit provides constant driving current for the SLD chip 1, and ensures the stability of the output optical power and the center wavelength of the SLD chip 1.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The optical transceiver integrated module for the interference type optical fiber gyro is characterized in that: comprises a light source component, a lens group, a photoelectric detector and a shell;
the light source component comprises an SLD chip, a thermistor and a semiconductor refrigerator;
the lens group comprises a double-focus double-convex cylindrical lens, a beam splitting prism, a self-focusing lens and a plano-convex lens;
the double-focus double-convex cylindrical lens is formed by integrally forming a first cylindrical lens and a second cylindrical lens; the dual focal length lenticular lens is used for collimating the light beam emitted by the SLD chip, wherein: the first cylindrical lens of the double-focus double-convex cylindrical lens is used for collimating the light beam with larger divergence angle in the vertical plane, and the second cylindrical lens of the double-focus double-convex cylindrical lens is used for collimating the light beam with smaller divergence angle in the horizontal plane;
the light emitted by the SLD chip sequentially passes through a double-focus double-convex cylindrical lens, a beam splitting prism and a self-focusing lens, wherein the main optical axes of the double-focus double-convex cylindrical lens, the beam splitting prism and the self-focusing lens are on the same straight line; the optical transceiver module is connected with the optical fiber tail fiber through the self-focusing lens, so that the optical interaction between the optical transceiver module and the optical fiber gyro sensitive module consisting of the Y waveguide and the optical fiber ring is realized;
the plano-convex lens is arranged on a reflection light path after the return light is split by the beam splitter prism; the light receiving surface of the photoelectric detector is arranged in the focal length range of the plano-convex lens; light returned from the fiber optic gyroscope sensitive module is converted into parallel light through the self-focusing lens, and the parallel light is reflected after being split by the splitting prism, and is received by the photoelectric detector after being incident from the convex surface of the plano-convex lens;
the inner wall of the shell is formed with a light source base with a ladder structure and a coupling light splitting substrate, the light source base is an uploading object plane, and the coupling light splitting substrate is a downloading object plane; the SLD chip and the thermistor are arranged on a semiconductor refrigerator through a heat sink, and the semiconductor refrigerator is welded and fixed on a light source base; the double-focus double-convex cylindrical lens, the beam splitting prism, the plano-convex lens and the photoelectric detector are all arranged on the coupling beam splitting substrate;
the shell also comprises a plurality of pins, wherein the pins are used for connecting an external circuit with the SLD chip, the thermistor, the semiconductor refrigerator and the photoelectric detector.
2. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the double-focus double-convex cylindrical lens is installed and fixed on the coupling beam-splitting substrate by adopting a U-shaped groove bracket.
3. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 2, wherein: and the two convex surfaces of the double-focus double-convex cylindrical lens are plated with an antireflection film.
4. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the transmission and reflection spectrum ratio of the spectrum prism is 50%:50%, the incident surface and the emergent surface of the beam-splitting prism are coated with an antireflection film.
5. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 4, wherein: the beam splitting prism is welded on the coupling beam splitting substrate through the fixing seat.
6. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the plane and the convex surface of the plano-convex lens are plated with an antireflection film.
7. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the plano-convex lens and the photoelectric detector are respectively arranged at two ends of the fixed sleeve, and the fixed sleeve is welded on the coupling beam-splitting substrate through the bracket.
8. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the self-focusing lens is arranged in the optical fiber collimator gold-plated pipe, and the optical fiber collimator gold-plated pipe is welded in the tail hole of the shell.
9. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the heat sink is an aluminum nitride ceramic substrate.
10. The integrated optical transceiver module for an interferometric fiber-optic gyroscope of claim 1, wherein: the external circuit comprises an automatic temperature control circuit, a constant current driving circuit and a signal processing circuit; the automatic temperature control circuit and the constant current driving circuit are arranged on the circuit board; the thermistor and the semiconductor refrigerator are connected with an automatic temperature control circuit, the constant current driving circuit is connected with the SLD chip, and the photoelectric detector is connected with the signal processing circuit.
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| CN202311019778.2A CN116793329A (en) | 2023-08-14 | 2023-08-14 | Optical transceiver integrated module for interference type optical fiber gyro |
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| CN202311019778.2A CN116793329A (en) | 2023-08-14 | 2023-08-14 | Optical transceiver integrated module for interference type optical fiber gyro |
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| CN117543320A (en) * | 2024-01-10 | 2024-02-09 | 四川中久大光科技有限公司 | Compact laser output method, laser output head and laser device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543320A (en) * | 2024-01-10 | 2024-02-09 | 四川中久大光科技有限公司 | Compact laser output method, laser output head and laser device |
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