CN114923474A - Integrated receiving and transmitting device for optical fiber gyroscope - Google Patents
Integrated receiving and transmitting device for optical fiber gyroscope Download PDFInfo
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- CN114923474A CN114923474A CN202210845901.5A CN202210845901A CN114923474A CN 114923474 A CN114923474 A CN 114923474A CN 202210845901 A CN202210845901 A CN 202210845901A CN 114923474 A CN114923474 A CN 114923474A
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- lens
- beam splitter
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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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- Optics & Photonics (AREA)
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- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The application relates to the technical field of fiber optic gyroscopes, in particular to an integrated transceiver for a fiber optic gyroscope, which comprises a shell, an SLD chip, a first lens, a combined lens, a beam splitter and a detector; an exit port is formed in the shell, a second lens is arranged at the exit port, and the exit port is connected with an optical fiber; the transmitting end of the SLD chip is opposite to the first lens, the first lens is opposite to the incident surface of the beam splitter, the first output surface of the beam splitter is opposite to the second lens at the exit, the second output surface of the beam splitter is opposite to the combined lens, and the detector is coupled with the combined lens; the SLD chip, the first lens, the combined lens, the beam splitter and the detector are all arranged in the shell; the SLD chip is used for emitting an A light wave; the first lens is used for receiving the A light wave and converting the A light wave into a parallel B light wave; the beam splitter is used for splitting the light waves; the detector is used for converting the received optical waves into electric signals. The application has the effect of reducing the volume of the fiber-optic gyroscope.
Description
Technical Field
The application relates to the technical field of fiber-optic gyroscopes, in particular to an integrated receiving and transmitting device for a fiber-optic gyroscope.
Background
With the increasing application scenes of gyroscopes, the requirements on the gyroscopes are increasing, and the optical fiber gyroscopes have been greatly developed as gyroscopes with better development prospects.
In the related art, an optical fiber gyroscope includes five core components, which are a light source, a beam splitter, a detector, a waveguide, and an optical fiber ring, respectively, where the light source is configured to emit a light wave, the light wave enters the optical fiber ring through the waveguide after passing through the beam splitter, the light wave returns to the beam splitter from the optical fiber ring through the waveguide, and the beam splitter causes the returned light wave to enter the detector. The five core components are arranged in a split manner, and can form the optical fiber gyroscope and realize the basic functions of the optical fiber gyroscope after being connected.
However, since the five core components are separately arranged, the optical fiber gyroscope needs to be formed after connection, and since the connecting component is used during connection, the size of the optical fiber gyroscope is large.
Disclosure of Invention
In order to reduce the volume of the optical fiber gyroscope, the application provides an integrated receiving and transmitting device for the optical fiber gyroscope.
The application provides an integrated transceiver for fiber-optic gyroscope adopts following technical scheme:
an integrated transceiver for a fiber-optic gyroscope comprises a shell, an SLD chip, a first lens, a combined lens, a beam splitter and a detector; an exit port is formed in the shell, a second lens is arranged at the exit port, and the exit port is connected with an optical fiber;
the transmitting end of the SLD chip is over against the first lens, the first lens is over against the incident surface of the beam splitter, the first output surface of the beam splitter is over against the second lens at the exit, the second output surface of the beam splitter is over against the combined lens, and the detector is coupled with the combined lens; the SLD chip, the first lens, the combined lens, the beam splitter and the detector are all arranged in the shell;
the SLD chip is used for emitting an A light wave;
the first lens is used for receiving the A light waves and converting the A light waves into parallel B light waves;
the beam splitter is used for splitting the light wave;
the detector is used for converting the received optical waves into electric signals.
Through adopting above-mentioned technical scheme, integrate SLD chip, beam splitter and the three fiber optic gyroscope's of detector core component, compare in fiber optic gyroscope's among the correlation technique core component components of a whole that can function independently setting, then interconnect's mode, integrated setting can reduce the light path distance to make fiber optic gyroscope miniaturized with integrated transceiver, and then reduce fiber optic gyroscope's volume.
Optionally, the optical system further includes an isolator, the isolator is integrated with the beam splitter and located at the incident surface of the beam splitter, and the isolator is configured to isolate the C light wave propagating at the beam splitter to the first lens.
By adopting the technical scheme, the isolator is used for isolating the C light wave transmitted to the first lens from the beam splitter, so that the influence of the C light wave on the light wave emitted by the SLD chip is reduced.
Optionally, the shell is a single-sided 8PIN butterfly shell.
Through adopting above-mentioned technical scheme, adopt unilateral 8PIN butterfly-shaped shell can be better reduce the light path distance to realize miniaturized design, and then reduce fiber-optic gyroscope's volume.
Optionally, the combined lens includes a third lens and a prism, the third lens and the prism are integrated, an incident surface of the third lens faces the second output surface of the beam splitter, and an output surface of the prism faces the detector.
Optionally, an output surface of the prism faces downward, and a receiving end of the detector faces the output surface of the prism.
By adopting the technical scheme, the prism changes the light transmission direction, so that the light is transmitted to the detector downwards, and the possibility that the receiving end of the detector cannot be over against the prism output surface is reduced.
Optionally, a heat sink and a TEC refrigerator for dissipating heat are disposed in the housing, the TEC refrigerator is disposed inside the housing, the heat sink is disposed on the TEC refrigerator, the SLD chip, the first lens, the combined lens, and the beam splitter are all disposed on the heat sink, and the detector is disposed on the TEC refrigerator.
Through adopting above-mentioned technical scheme, on heat sink absorbs on the heat transfer to TEC refrigerator, utilize TEC refrigerator with heat transfer to the casing on, then the casing gives off the heat to the external world, realizes the heat dissipation function.
In summary, the present application includes at least one of the following beneficial technical effects:
1. core components of the three fiber-optic gyroscopes including the SLD chip, the beam splitter and the detector are integrated, and compared with the core components of the fiber-optic gyroscopes in the related art which are arranged in a split mode and then connected with each other, the integrated arrangement can reduce the optical path distance, so that the integrated transceiver for the fiber-optic gyroscope is miniaturized, and the size of the fiber-optic gyroscope is reduced;
2. the isolator is used for isolating the C light waves transmitted to the first lens from the beam splitter, so that the influence of the C light waves on the light waves emitted by the SLD chip is reduced;
3. adopt unilateral 8PIN butterfly-shaped shell can be better reduce the light path distance to realize miniaturized design, and then reduce fiber-optic gyroscope's volume.
Drawings
Fig. 1 is a schematic diagram showing an overall structure of an embodiment of the present application.
Fig. 2 is a schematic diagram showing components inside a housing according to an embodiment of the present application.
Description of the reference numerals: 1. a housing; 11. an exit port; 2. an SLD chip; 3. a first lens; 4. a combination lens; 41. a third lens; 42. a prism; 5. a beam splitter; 6. a detector; 7. an optical fiber; 8. a heat sink; 9. and a TEC refrigerator.
Detailed Description
The present application will be described in further detail below with reference to fig. 1-2 and examples. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Taking the position of the integrated transceiver for the fiber optic gyroscope in fig. 1 as an example, four directions of "up", "down", "left" and "right" are determined, and the directions are defined for better explanation of the embodiment.
The embodiment of the application discloses an integrated transceiver for a fiber-optic gyroscope. Referring to fig. 1 and 2, an integrated transceiver for a fiber-optic gyroscope includes a housing 1, an SLD chip 2, a first lens 3, a combined lens 4, a beam splitter 5, and a detector 6, where the housing 1 is provided with an exit port 11, a second lens is provided at the exit port 11, and the exit port 11 is connected to an optical fiber 7. The transmitting end of the SLD chip 2 is opposite to the first lens 3, the first lens 3 is opposite to the incident surface of the beam splitter 5, the first output surface of the beam splitter 5 is opposite to the second lens at the position of the emergent port 11, the second output surface of the beam splitter 5 is opposite to the combined lens 4, and the combined lens 4 is coupled with the detector 6.
The SLD chip 2 is used as a light source to emit an A light wave, the A light wave is converted into a parallel B light wave after passing through the first lens 3, then the B light wave is transmitted to the beam splitter 5, the beam splitter 5 performs beam splitting processing on the B light wave, the beam splitter 5 refracts fifty percent of the light in the B light wave, and the other fifty percent of the light passes through the beam splitter 5. The light passing through the beam splitter 5 passes through the second lens, the second lens converges the light, and the converged light enters the optical fiber 7. Then enters the waveguide, and the waveguide splits the beam light and the light enters the optical fiber ring. Then, the light returns from the optical fiber ring, the returned light wave is named as a C light wave, the C light wave sequentially passes through the waveguide, the optical fiber 7 and the second lens and then is transmitted to the beam splitter 5, the beam splitter 5 performs beam splitting processing on the C light wave again, fifty percent of the light is split to the combined lens 4 and enters the detector 6.
The a light wave is a non-parallel light wave, and the B light wave is a parallel light wave processed by the first lens 3. The shell 1 is a single-side 8PIN butterfly-shaped shell. The first lens 3 can be an aspheric lens which can convert the light wave of the light source into parallel light. The second LENS is a C-LENS which is used for converging the light.
The integrated transceiver for the fiber-optic gyroscope integrates the SLD chip 2, the beam splitter 5 and the detector 6 which are used as light sources, so that the distance of a light path is reduced, the distance of the light path can be reduced by adopting a single-side 8PIN butterfly-shaped shell, and the purpose of reducing the volume of the fiber-optic gyroscope is achieved.
An isolator is integrated on the beam splitter 5 and is positioned on the incident surface of the beam splitter 5. After the C light wave passes through the beam splitter 5, fifty percent of the light enters the combined lens 4, and the return light of the other fifty percent passes through the beam splitter 5 and propagates towards the first lens 3, but owing to the isolator, the isolator separates the light propagating towards the first lens 3 through the beam splitter 5, thereby reducing the possibility that the C light wave propagates to the first lens 3 through the beam splitter 5, further reducing the influence of the C light wave on the a light wave emitted by the SLD chip 2, and achieving the purpose of improving the performance of the fiber optic gyroscope.
Specifically, the isolator comprises a first polaroid, a second polaroid and an optical rotation sheet, the optical rotation sheet is located between the first polaroid and the second polaroid, the second polaroid is located on one side, close to the beam splitter 5, of the optical rotation sheet, and the first polaroid is located on one side, far away from the beam splitter 5, of the optical rotation sheet. The polarization direction of the first polarizer and the polarization direction of the second polarizer are forty-five degrees, and the polarization direction of the light which can be emitted by the optical rotation sheet is rotated by the forty-five degrees.
For example, when viewed from the direction from the first lens toward the first polarizing plate, the polarization direction of the second polarizing plate is rotated by forty-five degrees counterclockwise with respect to the polarization direction of the first polarizing plate, and the rotation direction of the optical rotation plate is also rotated by forty-five degrees counterclockwise. At this time, the light propagates from the first lens to the first polarizer, the polarization direction of the light is determined after the light passes through the first polarizer, the polarization direction of the light is rotated by the optical rotation sheet by forty-five degrees counterclockwise, the polarization direction of the light is the same as the polarization direction of the second polarizer, and the light can pass through the second polarizer. When light propagates from the beam splitter to the second polarizer, the polarization direction of the light after passing through the second polarizer is determined, the polarization direction of the light after being processed by the optical rotation sheet is rotated by forty-five degrees anticlockwise, and the polarization direction of the light is perpendicular to the polarization direction of the first polarizer at ninety degrees because the polarization direction of the second polarizer is rotated by forty-five degrees anticlockwise compared with the polarization direction of the first polarizer, and at the moment, the light cannot pass through the first polarizer. Therefore, the first polarizing plate, the second polarizing plate, and the optical rotation plate can isolate light propagating from the beam splitter 5 to the first lens 3 while allowing the light to normally pass through the isolator and enter the beam splitter 5.
Referring to fig. 2, the combination lens 4 includes a third lens 41 and a prism 42, the third lens 41 and the prism 42 are integrally disposed, and the detector 6 is located below the combination lens 4. The light wave of C light beam split by the beam splitter 5 to the combined lens 4 enters from the incident surface of the third lens 41 and is then reflected by the prism 42, so that the propagation direction of the light wave is changed, and the light wave enters the detector 6.
Wherein the third lens 41 is for converging light.
Referring to fig. 2, the third lens 41 and the prism 42 are integrated, so that the occupied space of the two can be reduced to a certain extent, the output surface of the prism 42 faces downward, and the receiving end of the detector 6 directly faces the output surface of the prism 42, so that the error caused by difficulty in controlling the height when the detector 6 is attached to the patch can be reduced, and the detection accuracy can be improved.
For the error development caused by the difficulty in height control, the light source emits light waves which are processed for multiple times and then transmitted out from the optical fiber 7 of the exit 11, and the light in the process is emitted light; the light returns to the beam splitter 5 from the optical fiber 7 and finally propagates to the detector 6, and the light in the process is recycled light; according to design requirements, the emitted light and the recycled light should be in the same plane. If the design is not according to this embodiment, the prism 42 is not provided, the light directly enters the third lens 41 after coming out from the beam splitter 5, and then the detector 6 is vertically arranged, and at this time, the light propagates to the detector 6 after passing through the third lens 41. However, in actual production, the detector 6 is vertically arranged, and because the detector 6 is a patch welded structure, the height of the detector 6 is difficult to control, the third lens 41 cannot be aligned to the receiving end of the detector 6, so that the production difficulty is high, and the accuracy of the detection result of the produced product is easily reduced when the detection is performed.
In summary, in this embodiment, the prism 42 is added, so that the light is transmitted downward, the detector 6 does not need to consider the problem that the height is difficult to control, and only the position of the detector 6 needs to be adjusted so that the receiving end of the detector 6 faces the output surface of the prism 42, and through the design of the mechanical structure, the production difficulty is reduced, and the accuracy of the detection result can also be improved.
A TEC refrigerator 9 used for dissipating heat is arranged in the shell 1, the TEC refrigerator 9 is fixed on the bottom surface inside the shell 1, the SLD chip 2, the first lens 3, the combined lens 4, the beam splitter 5 and the detector 6 are all fixed on a heat sink 8, and the heat sink 8 is fixed on the TEC refrigerator 9. On heat sink 8 absorbed the heat and transmitted heat to TEC refrigerator 9, thereby TEC refrigerator 9 transmitted the heat to casing 1 on with heat transfer goes out, and then realizes the heat dissipation function.
The implementation principle of the integrated transceiver for the fiber-optic gyroscope in the embodiment of the application is as follows: the SLD chip 2 emits an A light wave, the A light wave is converted into a parallel B light wave through the processing of the first lens 3, the B light wave is transmitted to the beam splitter 5, the beam splitter 5 performs beam splitting processing on the B light wave, so that fifty percent of light in the B light wave is transmitted into the optical fiber 7 through the exit port 11, then the light is transmitted to the waveguide and the optical fiber ring again, the light wave returned from the optical fiber ring is a C light wave, the C light wave is transmitted to the beam splitter 5 through the second lens after passing through the waveguide, fifty percent of light in the C light wave enters the third lens 41, and the other fifty percent of light is blocked by the isolator.
The light entering the third lens 41 is condensed and then reflected to the receiving end of the detector 6 via the prism 42, and the detector 6 converts the received light into an electrical signal.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the present application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (6)
1. An integrated transceiver for a fiber optic gyroscope, comprising: the device comprises a shell (1), an SLD chip (2), a first lens (3), a combined lens (4), a beam splitter (5) and a detector (6); an exit port (11) is formed in the shell (1), a second lens is arranged at the exit port (11), and the exit port (11) is connected with an optical fiber (7);
the transmitting end of the SLD chip (2) is over against the first lens (3), the first lens (3) is over against the incident surface of the beam splitter (5), the first output surface of the beam splitter (5) is over against the second lens at the exit port (11), the second output surface of the beam splitter (5) is over against the combined lens (4), and the detector (6) is coupled with the combined lens (4); the SLD chip (2), the first lens (3), the combined lens (4), the beam splitter (5) and the detector (6) are all arranged in the shell (1);
the SLD chip (2) is used for emitting A light waves;
the first lens (3) is used for receiving the A light wave and converting the A light wave into a parallel B light wave;
the beam splitter (5) is used for splitting the light wave;
the detector (6) is used for converting the received optical waves into electric signals.
2. The integrated transceiver device for a fiber optic gyroscope of claim 1, wherein: the optical fiber coupler also comprises an isolator, wherein the isolator is integrated with the beam splitter (5) and is positioned on the incident surface of the beam splitter (5), and the isolator is used for isolating C light waves transmitted from the beam splitter (5) to the first lens (3).
3. The integrated transceiver for fiber-optic gyroscope of claim 1, wherein: the shell (1) is a single-side 8PIN butterfly-shaped shell.
4. The integrated transceiver for fiber-optic gyroscope of claim 1, wherein: the combined lens (4) comprises a third lens (41) and a prism (42), the third lens (41) and the prism (42) are arranged in an integrated mode, the incident surface of the third lens (41) faces the second output surface of the beam splitter (5), and the output surface of the prism (42) faces the detector (6).
5. The integrated transceiver for fiber-optic gyroscope of claim 4, wherein: the output surface of the prism (42) faces downwards, and the receiving end of the detector (6) is opposite to the output surface of the prism (42).
6. The integrated transceiver for fiber-optic gyroscope of claim 1, wherein: the heat sink (8) and the TEC refrigerator (9) used for dissipating heat are arranged in the shell (1), the TEC refrigerator (9) is arranged inside the shell (1), the heat sink (8) is arranged on the TEC refrigerator (9), the SLD chip (2), the first lens (3), the combined lens (4) and the beam splitter (5) are all arranged on the heat sink (8), and the detector (6) is arranged on the TEC refrigerator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845901.5A CN114923474A (en) | 2022-07-19 | 2022-07-19 | Integrated receiving and transmitting device for optical fiber gyroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845901.5A CN114923474A (en) | 2022-07-19 | 2022-07-19 | Integrated receiving and transmitting device for optical fiber gyroscope |
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| Publication Number | Publication Date |
|---|---|
| CN114923474A true CN114923474A (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210845901.5A Pending CN114923474A (en) | 2022-07-19 | 2022-07-19 | Integrated receiving and transmitting device for optical fiber gyroscope |
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| Country | Link |
|---|---|
| CN (1) | CN114923474A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852613A (en) * | 2010-04-20 | 2010-10-06 | 北京航空航天大学 | Light transceiving integrated device applied to fiber sensing |
| CN111504296A (en) * | 2020-04-24 | 2020-08-07 | 武汉光迅科技股份有限公司 | Optical transceiver module and optical fiber sensing device |
| WO2021186357A1 (en) * | 2020-03-18 | 2021-09-23 | Civitanavi Systems S.R.L. | Semi-finished product for the construction of a gyroscope and gyroscope including the semi-finished product |
-
2022
- 2022-07-19 CN CN202210845901.5A patent/CN114923474A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852613A (en) * | 2010-04-20 | 2010-10-06 | 北京航空航天大学 | Light transceiving integrated device applied to fiber sensing |
| WO2021186357A1 (en) * | 2020-03-18 | 2021-09-23 | Civitanavi Systems S.R.L. | Semi-finished product for the construction of a gyroscope and gyroscope including the semi-finished product |
| CN111504296A (en) * | 2020-04-24 | 2020-08-07 | 武汉光迅科技股份有限公司 | Optical transceiver module and optical fiber sensing device |
Non-Patent Citations (1)
| Title |
|---|
| 魏新国等: "一种新颖的微型化收发一体模块", 《北京航空航天大学学报》 * |
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Application publication date: 20220819 |
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