CN117647239A - Integrated optical gyroscope - Google Patents
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- CN117647239A CN117647239A CN202311668898.5A CN202311668898A CN117647239A CN 117647239 A CN117647239 A CN 117647239A CN 202311668898 A CN202311668898 A CN 202311668898A CN 117647239 A CN117647239 A CN 117647239A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 195
- 238000001914 filtration Methods 0.000 claims description 24
- 230000010287 polarization Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 7
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- 230000000694 effects Effects 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
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- 238000000926 separation method Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
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- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
The present application relates to an integrated optical gyroscope, comprising: a light source module for outputting a first light signal and a second light signal; the delay loop comprises a delay module, the delay loop is used for receiving the first optical signals and the second optical signals output by the light source module, the received optical signals are divided into a first group of signals and a second group of signals, the first optical signals and the second optical signals are modulated and then transmitted to the delay module in opposite directions in the delay loop, the delay module is used for converting the first optical signals in the modulated first group of signals into phonon signals and transmitting the phonon signals to modulate the second optical signals in the first group of signals, and converting the first optical signals in the modulated second group of signals into phonon signals and transmitting the phonon signals to modulate the second optical signals in the second group of signals. The delay module in the delay loop can convert the modulated signal into phonon signal for transmission, so that larger delay is obtained, larger phase difference is generated, and the sensing precision of the integrated optical gyroscope is improved.
Description
Technical Field
The application relates to the technical field of photonic integrated devices, in particular to an integrated optical gyroscope.
Background
At present, the interference type optical fiber gyroscope has the characteristics of high sensitivity and high reliability, and has been widely applied to the fields of aviation, navigation, vehicle-mounted and the like.
The currently mainstream fiber optic gyroscopes in the related art are mainly implemented based on discrete devices, and the use of numerous discrete devices, especially optical fibers, limits the ability of the gyroscopes to be further miniaturized and integrated. The integrated optical gyroscope realized by the integrated device at present forms an optical fiber gyro effect based on optical fibers, and the sensing precision of the integrated optical gyroscope realized by the integrated device is poor.
Therefore, there is a need to design a new integrated optical gyroscope to overcome the above-mentioned problems.
Disclosure of Invention
The application provides an integrated optical gyroscope, which can solve the technical problem of poor sensing precision of the integrated optical gyroscope realized in the related technology.
In a first aspect, embodiments of the present application provide an integrated optical gyroscope, comprising: a light source module for outputting a first light signal and a second light signal; the delay loop comprises a delay module, the delay loop is used for receiving a first optical signal and a second optical signal output by the light source module, dividing the received optical signals into a first group of signals and a second group of signals, modulating the first optical signals in the first group of signals into phonon signals, modulating the second optical signals in the first group of signals in the phonon form, and modulating the second optical signals in the second group of signals in the phonon form.
With reference to the first aspect, in one implementation manner, the delay module includes a phonon waveguide, and the delay module is configured to convert a first optical signal in the modulated first set of signals into a phonon signal and transmit the phonon signal to modulate a second optical signal in the first set of signals.
With reference to the first aspect, in an embodiment, the delay module further includes a first-power resonant cavity and a second-power resonant cavity, where the first-power resonant cavity is configured to amplify a first optical signal in the modulated first set of signals, and when a mode of the first-power resonant cavity is frequency-coincident with the first optical signal in the amplified first set of signals, an amplified phonon signal is generated and propagates through the phonon waveguide.
With reference to the first aspect, in one embodiment, the delay module further includes a first port connected to the first-power cavity and a second port connected to the second-power cavity.
With reference to the first aspect, in an implementation manner, the delay loop further includes a light splitting module, where the light splitting module is configured to split a received optical signal into a first set of signals and a second set of signals, and two beam splitting ports of the light splitting module are respectively connected to two ports of the delay module, where each of the first set of signals and the second set of signals includes a first optical signal and a second optical signal.
With reference to the first aspect, in one embodiment, the delay loop further includes a first modulation module and a second modulation module, one beam splitting port of the beam splitting module is connected to one port of the delay module through the first modulation module, and the other beam splitting port of the beam splitting module is connected to the other port of the delay module through the second modulation module.
With reference to the first aspect, in one implementation manner, the integrated optical gyroscope further includes an optical circulator, a first port of the optical circulator is connected to the light source module, and a second port of the optical circulator is connected to a beam combining port of the beam splitting module.
With reference to the first aspect, in an implementation manner, the integrated optical gyroscope further includes a polarization filtering module, and the polarization filtering module is connected between the light source module and the optical circulator.
With reference to the first aspect, in one implementation, the integrated optical gyroscope further includes an optical filtering module connected to the third port of the optical circulator.
With reference to the first aspect, in an implementation manner, the integrated optical gyroscope further includes a photodetection module, and the photodetection module is connected to the optical filtering module.
The beneficial effects that technical scheme that this application embodiment provided include:
through setting up delay loop, can divide into first group signal and second group signal and the transmission to delay module along opposite direction in delay loop after modulating, first group signal and second group signal can produce the phase difference after transmitting in delay loop, and delay module in the delay loop can be with the signal conversion after modulating phonon signal and with phonon form transmission, because the signal is with phonon form transmission, the speed is showing to reduce, can obtain bigger delay, consequently can produce bigger phase difference, show the sensing precision that promotes integrated optical gyroscope, the technical problem that sensing precision is relatively poor in the correlation technique has been solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an integrated optical gyroscope according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a delay module according to an embodiment of the present application.
In the figure:
1100. a light source module; 1200. a deflection filtering module; 1300. an optical circulator; 1400. a light splitting module; 1500. a first modulation module;
1600. a delay module; 1610. a first port; 1620. a first optical power resonant cavity; 1630. phonon wave guide; 1640. a second-power resonant cavity; 1650. a second port;
1700. a second modulation module; 1800. an optical filtering module; 1900. and a photoelectric detection module.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the related art, the existing integrated optical gyroscope realized based on an integrated device is poor in sensing precision due to the lack of a device capable of replacing optical fibers to realize low loss and large delay. Therefore, how to realize an integratable high-quality delay device and realize a high-precision integrated optical gyroscope is a problem to be solved at present.
The embodiment of the application provides an integrated optical gyroscope, which can solve the technical problem of poor sensing precision of the integrated optical gyroscope realized in the related technology.
Referring to fig. 1, an integrated optical gyroscope according to an embodiment of the present application includes: a light source module 1100 for outputting a first light signal and a second light signal, wherein the light source module 1100 can output two light signals of different frequencies at the same time; the delay loop includes a delay module 1600, where the delay loop is configured to receive a first optical signal and a second optical signal output by the light source module 1100, and divide the received first optical signal and second optical signal into a first group of signals and a second group of signals, where the first group of signals and the second group of signals include the first optical signal and the second optical signal, and the first group of signals and the second group of signals are modulated and then are transmitted to the delay module 1600 in opposite directions in the delay loop, that is, one group of signals is transmitted in a clockwise direction, and the other group of signals is transmitted in a counterclockwise direction, and the delay module 1600 is configured to convert the first optical signal in the modulated first group of signals into a phonon signal and then modulate the second optical signal in the first group of signals after being transmitted in a phonon form, and then convert the first optical signal in the modulated second group of signals into the phonon signal and then modulate the second optical signal in the second group of signals after being transmitted in a phonon form.
In this embodiment, taking clockwise transmission of the first set of signals and counterclockwise transmission of the second set of signals as an example, after entering the delay loop, the first optical signal and the second optical signal output by the light source module 1100 are first divided into two sets of signals in the delay loop, that is, the first set of signals and the second set of signals, where the first set of signals are transmitted clockwise, the first set of signals enter the delay module 1600 clockwise after being modulated, the second set of signals are transmitted counterclockwise, and the second set of signals enter the delay module 1600 counterclockwise after being modulated; the first optical signal in the first group of signals entering the delay module 1600 clockwise is converted into a phonon signal firstly, and the phonon signal is transmitted to modulate the second optical signal in the first group of signals and is transmitted clockwise, and the second optical signal is transmitted in a delay loop for one week and is output; the first optical signal of the second set of signals entering the delay module 1600 in the counterclockwise direction is also converted into a phonon signal, and the phonon signal is transmitted to modulate the second optical signal of the second set of signals, and is transmitted in the counterclockwise direction, and is output after being transmitted for one week in the delay loop.
In this embodiment, by setting a delay loop, an optical signal may be divided into a first group of signals and a second group of signals and modulated and then transmitted to the delay module 1600 along the opposite direction in the delay loop, and due to the sagnac effect (sagnac effect), a phase difference may be generated after the first group of signals and the second group of signals are transmitted in the delay loop, and because the magnitude of the phase difference generated by the delay module 1600 is related to the rotational angular velocity perceived by the first group of signals and the second group of signals, the magnitude of an intensity signal obtained through the phase difference information may directly reflect the perceived rotational angular velocity, thereby implementing the function of the gyroscope.
In addition, the delay module 1600 in the delay loop can convert the modulated signal into a phonon signal and transmit the phonon signal, and as the signal is transmitted in the phonon form, the speed is obviously reduced, larger delay can be obtained, so that larger phase difference can be generated, the phase difference can be converted into power difference, the phase difference is larger, so that the perceived power difference is more obvious, and the realized optical gyroscope has higher sensing precision and solves the technical problem of poor sensing precision in the related technology.
Referring to fig. 2, in one embodiment, the delay module 1600 includes a phonon waveguide 1630, and the delay module 1600 is configured to convert a first optical signal in the modulated first set of signals into a phonon signal and transmit a second optical signal in the modulated first set of signals through the phonon waveguide 1630 in phonon form. In this embodiment, a first optical signal in the modulated first set of signals entering the delay module 1600 clockwise is first converted into a phonon signal, and then transmitted to the other side of the phonon waveguide 1630 through the phonon waveguide 1630, and a second optical signal in the modulated first set of signals on the other side of the phonon waveguide 1630 is modulated by the phonon signal transmitted by the phonon waveguide 1630; the first optical signal in the modulated second set of signals entering the delay module 1600 anticlockwise is converted into a phonon signal, and then transmitted to the other side of the phonon waveguide 1630 through the phonon waveguide 1630, where the second optical signal in the second set of signals on the other side of the phonon waveguide 1630 is modulated by the phonon signal transmitted by the phonon waveguide 1630. Because the phonon signal is transmitted in phonon form in phonon waveguide 1630, delay module 1600 based on phonon waveguide 1630 can provide a much greater delay than a conventional optical waveguide, and therefore a greater phase difference can be created.
Referring to fig. 2, in some embodiments, the delay module 1600 may further include a first optical power resonator 1620 and a second optical power resonator 1640, where the first optical power resonator 1620 is connected to one end of the phonon waveguide 1630, the second optical power resonator 1640 is connected to the other end of the phonon waveguide 1630, and the first optical power resonator 1620 is configured to amplify a first optical signal of the modulated first set of signals, and when a mode of the first optical power resonator 1620 is coincident with a frequency of the first optical signal of the amplified first set of signals, generate an amplified phonon signal and propagate through the phonon waveguide 1630. The second optical power cavity 1640 may amplify a second optical signal of the modulated first set of signals. In particular, e.g. the first groupThe first optical signal frequency in the signal is omega 1 The second optical signal in the first set of signals has a frequency omega 2 First optical signal omega in first group of signals 1 Modulated to obtain a modulated signal omega 1 +ω f The second optical signal omega in the first set of signals 2 Modulated to obtain a modulated signal omega 2 +ω f Modulating signal omega 1 +ω f After entering first-power cavity 1620, the signal is ω 1 +ω f Is used as pump light to excite Stokes wave and to omega 1 +ω f Amplifying to obtain signal omega 1 +ω f -ω s1 Wherein ω is s1 Is the frequency interval between Stokes wave and pump light; modulating signal omega 2 +ω f After entering the second-power resonant cavity 1640, amplified to obtain a signal omega 2 +ω f -ω s2 Wherein ω is s2 Is the frequency separation of the stokes wave from the pump light.
Referring to fig. 2, in an embodiment, the delay module 1600 may further include a first port 1610 and a second port 1650, where the first port 1610 is connected to the first optical power cavity 1620 and the second port 1650 is connected to the second optical power cavity 1640. The modulated first set of signals may enter first-power cavity 1620 through first port 1610 and the modulated second set of signals may enter second-power cavity 1640 through second port 1650.
Preferably, the delay module 1600 in this embodiment includes a phonon waveguide 1630, a first optical power cavity 1620, a second optical power cavity 1640, a first port 1610 and a second port 1650, where the first port 1610, the first optical power cavity 1620, the phonon waveguide 1630, the second optical power cavity 1640 and the second port 1650 are sequentially connected.
The delay module 1600 of the present application is preferably an on-chip device and may be implemented based on silicon-based materials, or other optical waveguide materials commonly used by those skilled in the art, such as lithium niobate thin films, silicon nitride, and the like. Other modules besides the delay module 1600 may be hybrid integration of devices on a chip or may be monolithically integrated by hybrid packaging of integrated devices.
Referring to fig. 1, in an embodiment of the foregoing disclosure, the delay loop may further include a splitting module 1400, where the splitting module 1400 is configured to split the received first optical signal and the received second optical signal into a first set of signals and a second set of signals, and two splitting ports of the splitting module 1400 are respectively connected to two ports of the delay module 1600. Wherein, the light source module 1100 can output two optical signals with different frequencies as the first optical signal ω 1 And a second optical signal omega 2 Two optical signals omega of different frequencies 1 And omega 2 After being output to the beam-splitting module 1400, the signals can be divided into two groups, namely a first group of signals and a second group of signals, each group of signals comprises a frequency omega 1 And omega 2 And inputs the two sets of signals into delay module 1600 from two different ports of delay module 1600, respectively.
Further, in an embodiment, the delay loop further includes a first modulation module 1500 and a second modulation module 1700, one beam splitting port of the beam splitting module 1400 is connected to one port of the delay module 1600 through the first modulation module 1500, and the other beam splitting port of the beam splitting module 1400 is connected to the other port of the delay module 1600 through the second modulation module 1700. One port of the first modulation module 1500 is connected to one beam splitting port of the optical splitting module 1400, the other port of the first modulation module 1500 is connected to the first port 1610 of the delay module 1600, one port of the second modulation module 1700 is connected to the other beam splitting port of the optical splitting module 1400, and the other port of the second modulation module 1700 is connected to the second port 1650 of the delay module 1600. The modulation module in this embodiment may modulate the signal to obtain a modulated signal, where the optical signal that is clockwise transmitted into the first modulation module 1500 after being split by the optical splitter module 1400 may include a frequency ω 1 And omega 2 The optical signal of (2) is passed through the first modulation module 1500 and modulated to obtain a modulated signal omega 1 +ω f And omega 2 +ω f The frequency can be output after modulation in the first modulation module 1500The rate is omega 1 +ω f And omega 2 +ω f Is passed to delay module 1600; the optical signal transmitted into the second modulation module 1700 counterclockwise after the light is split by the light splitting module 1400 may also include a frequency ω 1 And omega 2 The optical signal of (2) is subjected to a second modulation module 1700 and modulated to obtain a modulated signal omega 1 +ω f And omega 2 +ω f The modulated second modulation module 1700 can output a frequency ω 1 +ω f And omega 2 +ω f Is passed to delay module 1600. In this embodiment, the same rf signal may be input to the first modulation module 1500 and the second modulation module 1700 to perform phase modulation on the optical signal.
Referring to fig. 1, in an embodiment, the integrated optical gyroscope may further include an optical circulator 1300, a first interface (i.e., number 1 in fig. 1) of the optical circulator 1300 is connected to the light source module 1100, and a second interface (i.e., number 2 in fig. 1) of the optical circulator 1300 may be connected to a beam combining port of the beam splitting module 1400. The optical signals output from the optical source module 1100 may be input to the first interface of the optical circulator 1300, and output from the second interface to the optical splitting module 1400, and divided into two groups of signals.
Referring to fig. 1, in some alternative embodiments, the integrated optical gyroscope may further include a polarization filtering module 1200, where the polarization filtering module 1200 is connected between the light source module 1100 and the optical circulator 1300. One end of the polarization filtering module 1200 is connected to the light source module 1100, and the other end of the polarization filtering module 1200 is connected to the first interface of the optical circulator 1300, so that two optical signals output from the light source module 1100 can keep only one polarization state through the polarization filtering module 1200.
Referring to fig. 1, in some embodiments, the integrated optical gyroscope further includes an optical filter module 1800, the optical filter module 1800 being connected to a third interface (i.e., number 3 in fig. 1) of the optical circulator 1300. In this embodiment, after the first set of signals and the second set of signals are transmitted in the delay loop for one turn, the two sets of signals are combined in the beam splitting module 1400 and output to the optical filtering module 1800 via the optical circulator 1300, and the optical filtering module 1800 can filter out the interference signals.
Preferably, the integrated optical gyroscope may further include a photodetection module 1900, where the photodetection module 1900 is connected to the optical filtering module 1800. In this embodiment, the signals filtered by the optical filtering module 1800 may be transmitted to the photoelectric detection module 1900, the phase difference information of the two sets of signals may be converted into intensity information by the photoelectric detection module 1900, and the intensity information may directly reflect the perceived rotation angular velocity, thereby implementing the function of the gyroscope.
The basic principle of the integrated optical gyroscope provided by the embodiment of the application is as follows: the light source module 1100 outputs light signals, the light signals are guaranteed to be output in one polarization state only through the polarization filtering module 1200, the light signals enter the light splitting module 1400 through the light circulator 1300 and are respectively transmitted in two opposite directions, delay is generated after the two groups of signals after light splitting are transmitted through the modulation module and the delay module 1600, the two groups of signals generate phase differences due to the sagnac effect, the two groups of signals are transmitted clockwise or anticlockwise and then are converged into the light splitting module 1400, the light signals are output to the optical filtering module 1800 through the light circulator 1300, interference signals are filtered, and finally phase difference information is converted into intensity information through the photoelectric detection module 1900. Since the magnitude of the phase difference generated by the delay module 1600 is related to the perceived rotational angular velocity, the magnitude of the finally obtained intensity signal can directly reflect the perceived rotational angular velocity, thereby realizing the function of the gyroscope.
The principles of the present application are described below in specific examples. See fig. 1 and 2:
the light source module 1100 outputs two frequencies ω 1 And omega 2 The optical signals of the (a) are subjected to the polarization filtering module 1200 so that the two optical signals only keep one polarization state; two optical signals are input to the first interface of the optical circulator 1300, output from the second interface to the optical splitting module 1400, and are split into two groups of signals. One set of signals is transmitted clockwise and the other set of signals is transmitted counter-clockwise. The clockwise transmitted signal passes through the first modulation module 1500 and is modulated to obtainTo the modulated signal omega 1 +ω f And omega 2 +ω f . Similarly, the signal transmitted counterclockwise also obtains a modulated signal ω through the second modulation module 1700 1 +ω f And omega 2 +ω f . The two sets of signals enter delay module 1600 from both ends, respectively, and first port 1610 and second port 1650 enter first optical power cavity 1620 and second optical power cavity 1640, respectively.
For a clockwise transmitted signal, the modulated signal enters the first-power cavity 1620 through the first port 1610 of the delay module 1600, where the signal is ω 1 +ω f Is used as pump light to excite Stokes wave and to omega 1 +ω f Amplifying to obtain amplified signal omega 1 +ω f -ω s1 Wherein ω is s1 Is the frequency separation of the stokes wave from the pump light. When the mode of first-power cavity 1620 coincides with the frequency of the amplified signal, an amplified phonon signal is generated and propagates through phonon waveguide 1630. The modulated signal is then converted into phonon signal for transmission. In the second-power cavity 1640, the signal ω is transmitted clockwise 2 +ω f Modulated by phonon signals transmitted by phonon waveguide 1630 and amplified by mechanical modes in second-power cavity 1640 to obtain amplified frequency ω 2 +ω f -ω s2 Is transmitted clockwise through the second port 1650. Since the signal is transmitted in phonon form in phonon waveguide 1630, the speed is significantly reduced and thus a greater delay is achieved.
Like the first set of signals transmitted clockwise, the second set of signals traveling counter-clockwise are ultimately output through the first port 1610. The signals transmitted in two directions are respectively input into the light splitting module 1400 through the modulation module, are input into the second interface of the optical circulator 1300 after being combined, are output from the third interface, enter the optical filtering module 1800 and are filtered to obtain omega 2 +ω f -ω s2 Nearby signals are transmitted to the photodetection module 1900. When the delay module 1600 is in a rotating state, the two signals input to the photodetection module 1900 have the same frequency, becauseThe sagnac effect generates different phase differences, the magnitude of the phase differences is related to the perceived rotation angular velocity, the phase differences are converted into detection power differences through the photoelectric detection module 1900, and the following formula is satisfied:
P D (t)＝P 0 sinΔφsinω f t。
wherein P is 0 Is a power component independent of phase frequency, delta phi is a phase difference generated between signals transmitted in two directions due to the sagnac effect, P D For the detected optical power, t is time, ω f For modulating the angular frequency of the signal. The delay module 1600 based on the phonon waveguide 1630 provides a delay far greater than that of a common optical waveguide, so that a larger phase difference delta phi is generated, the detected perceived power difference is more obvious, and the realized optical gyroscope has higher sensing precision.
The integrated optical gyroscope in the related art is low in delay quality, and the sensing precision of the gyroscope is insufficient.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An integrated optical gyroscope, comprising:
a light source module (1100) for outputting a first light signal and a second light signal;
the delay loop comprises a delay module (1600), the delay loop is used for receiving a first optical signal and a second optical signal output by the light source module (1100), dividing the received optical signals into a first group of signals and a second group of signals, modulating the first optical signals in the modulated first group of signals into phonon signals, transmitting the phonon signals in the first group of signals into the second optical signals in the first group of signals, modulating the first optical signals in the second group of signals into the phonon signals, and transmitting the first optical signals in the modulated second group of signals into the second optical signals in the second group of signals.
2. The integrated optical gyroscope of claim 1, wherein,
the delay module (1600) comprises a phonon waveguide (1630), and the delay module (1600) is used for converting a first optical signal in the modulated first group of signals into a phonon signal and transmitting the phonon signal to modulate a second optical signal in the first group of signals.
3. The integrated optical gyroscope of claim 2, wherein,
the delay module (1600) further includes a first optical power resonant cavity (1620) and a second optical power resonant cavity (1640), the first optical power resonant cavity (1620) is configured to amplify a first optical signal in the modulated first set of signals, and when a mode of the first optical power resonant cavity (1620) is frequency-coincident with the first optical signal in the amplified first set of signals, an amplified phonon signal is generated and propagates through the phonon waveguide (1630).
4. The integrated optical gyroscope of claim 3, wherein,
the delay module (1600) further includes a first port (1610) and a second port (1650), the first port (1610) being connected to the first optical power cavity (1620) and the second port (1650) being connected to the second optical power cavity (1640).
5. The integrated optical gyroscope of any of claims 1-4,
the delay loop further comprises a light splitting module (1400), wherein the light splitting module (1400) is used for splitting received optical signals into a first group of signals and a second group of signals, and two beam splitting ports of the light splitting module (1400) are respectively connected to two ports of the delay module (1600), wherein the first group of signals and the second group of signals comprise a first optical signal and a second optical signal.
6. The integrated optical gyroscope of claim 5, wherein,
the delay loop further comprises a first modulation module (1500) and a second modulation module (1700), wherein one beam splitting port of the beam splitting module (1400) is connected to one port of the delay module (1600) through the first modulation module (1500), and the other beam splitting port of the beam splitting module (1400) is connected to the other port of the delay module (1600) through the second modulation module (1700).
7. The integrated optical gyroscope of claim 5, wherein,
the integrated optical gyroscope further comprises an optical circulator (1300), a first interface of the optical circulator (1300) is connected to the light source module (1100), and a second interface of the optical circulator (1300) is connected to a beam combining port of the beam splitting module (1400).
8. The integrated optical gyroscope of claim 7, wherein,
the integrated optical gyroscope further comprises a polarization filtering module (1200), wherein the polarization filtering module (1200) is connected between the light source module (1100) and the optical circulator (1300).
9. The integrated optical gyroscope of claim 7, wherein,
the integrated optical gyroscope further comprises an optical filtering module (1800), the optical filtering module (1800) being connected to a third interface of the optical circulator (1300).
10. The integrated optical gyroscope of claim 9, wherein,
the integrated optical gyroscope further comprises a photoelectric detection module (1900), and the photoelectric detection module (1900) is connected with the optical filtering module (1800).
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