87 results about "Optical gyroscope" patented technology

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

The invention relates to a resonant optical gyroscope signal detection method based on an optical switch. The resonant optical gyroscope signal detection method comprises the following steps: step 1, adopting a narrow linewidth laser as a light source; 2, the split light field enters a lithium niobate phase modulator A and a phase modulator B to be modulated by a triangular wave voltage signal, the light field subjected to phase modulation is coupled in opposite directions to enter a waveguide resonant cavity, and a photoelectric detector A and a photoelectric detector B are used at the output end of the resonant cavity to obtain a voltage signal; and voltage signals obtained by the photoelectric detector A and the photoelectric detector B are accessed to a lock-in amplifier. 3, arranging an optical switch A between the waveguide resonant cavity and the photoelectric detector A; and an optical switch b is arranged between the waveguide resonant cavity and the photoelectric detector B, so that the detection of a gyro signal is completed. The interference of polarization noise can be reduced, and the resonant frequency locking precision and the angular velocity detection sensitivity of the gyroscope are improved.

The invention discloses a single-laser self-injection locking resonant optical gyroscope based on light intensity detection and a working method thereof, and belongs to the technical field of optical gyroscopes, a working light source DFB laser is connected with a first port of a circulator, and a second port of the circulator is connected with a beam splitting coupler through an isolator; two output ends of the beam splitting coupler are respectively connected with an input end of the echo wall microcavity and the phase modulator, and the phase modulator is connected with the other input end of the echo wall microcavity; a first port of the output end of the echo wall microcavity is connected with a third port of the circulator, and a second port of the output end of the echo wall microcavity is connected with the frequency locking amplifier through the photoelectric detector. According to the invention, the problems of high cost of double light sources in the self-injection locking resonant optical gyroscope and frequency drift and complex structure of beat frequency detection are solved, so that the measurement precision and economical efficiency of the gyroscope are effectively improved.

A photonic integrated circuit (PIC) comprises at least two optical circuits disposed on the PIC, two or more optical interfaces each configured to provide a connection to at least one external optical component, and a layout arrangement of the at least two optical circuits on the PIC, the layout arrangement configured such that the two or more optical interfaces are situated in at least one local group of optical interfaces, and the at least one local group of optical interfaces is located on at least one facet of the PIC. The at least two optical circuits may comprise a set of N single-axis 2×2 optical fiber optic gyroscope (FOG) circuits for use as a multi-axis FOG assembly in an inertial management unit (IMU) or an inertial navigation system (INS).

An optical waveguide structure for an optical gyroscope, the structure including a substrate; at least a first silicon nitride waveguide loop and a second silicon nitride waveguide loop connected to the substrate, the first silicon nitride waveguide loop and the second silicon nitride waveguide being disposed at different vertical distances from the substrate; at least one vertical coupler optically coupling the first silicon nitride waveguide loop to the second silicon nitride waveguide; and a plurality of air cavities defined in material below the first and second silicon nitride waveguide loops, no air cavities being defined in regions immediately below a coupling region defined around the at least one vertical coupler.

The lithium niobate-silicon nitride waveguide structure comprises a silicon substrate layer, a first silicon oxide isolation layer, a second silicon oxide isolation layer, a lithium niobate thin film layer and a silicon oxide dielectric layer which are stacked in sequence, the second silicon oxide isolation layer is wrapped with a silicon nitride layer; the thickness of the second silicon oxide isolation layer between the silicon nitride layer and the lithium niobate thin film layer is 50 + / -10nm; the thickness of the silicon nitride layer is 400 + / -10nm, and the thickness of the lithium niobate film layer is 600 + / -50nm; the silicon oxide dielectric layer is provided with at least two electrodes which are arranged at intervals. According to the lithium niobate-silicon nitride waveguide structure, the preparation method and the optical gyroscope provided by the invention, on the basis of the advantages of silicon nitride and lithium niobate materials, an ultra-low-loss silicon nitride waveguide, an ultra-high-Q-value micro-ring resonator and a high-modulation-rate lithium niobate modulator are obtained at the same time through a lithium niobate and silicon nitride hybrid integration method; and thus, the overall performance of the resonant integrated optical gyroscope is improved.

The present invention discloses a large dynamic range resonant fiber optic gyroscope, belonging to the technical field of optical sensing. It solves the problem that current optical gyroscopes have a small dynamic range and are non-adjustable, making it difficult to meet the needs of places with a large range of rotational speed variations, and that the direction of rotational speed can only be determined by phase modulation of light. The invention comprises first and second voltage signal sources, a laser, a polarization controller, a fiber coupler, a fiber ring, a piezoelectric ceramic tube, a detector, and a signal processing and control system. The invention utilizes the piezoelectric ceramic tube to control the cavity length of the fiber resonant cavity, thereby achieving a large dynamic range. At the same time, a narrow linewidth laser is utilized to output continuous, constant-intensity, frequency-tunable narrow linewidth laser light to obtain the transmission spectrum of the fiber resonant cavity. By accurately locating the resonant frequency, the magnitude and direction of the rotational speed can be simultaneously determined. The invention has the advantages of a large dynamic range, a large rotation rate measurement range, and the ability to determine the direction of rotational speed without phase modulation of light.

The present invention discloses a lithium niobate thin film phase modulator heterogeneously integrated with silicon nitride, belonging to the field of integrated optical gyroscopes; comprising a substrate, a silicon dioxide cladding, a lithium niobate thin film-silicon nitride optical waveguide core layer, and a modulation electrode; wherein the optical waveguide core layer is a ridge structure, comprising a lithium niobate thin film layer, a silicon nitride layer, and a silicon nitride carrier strip, satisfying single-mode transmission conditions; the silicon nitride carrier strip constitutes a multimode interference coupler, a bending unit, and a modulation arm; the multimode interference coupler adopts a one-to-two structure with a splitting ratio close to 1:1; the ridge waveguide structure is used for light transmission, and the multimode interference coupler unit is used for light splitting; simultaneously, three modulation electrodes generate an electric field, causing the light transmitted in the two modulation arms to undergo phase changes, thereby outputting two beams of light with a certain phase difference. Polarization is achieved based on the different binding effects of the ridge waveguide on the TE mode and the TM mode, that is, the loss of the TE mode and the TM mode in the waveguide is different, achieving a high polarization extinction ratio.

One or more phase modulators in an optical gyroscope operate on two counter-propagating beams to introduce a phase shift between the beams before the beams are interferometrically combined to generate a rotation signal. A signal generator generates first and second modulation frequencies to drive the phase modulators. The first modulation frequency in isolation biases the rotation signal at an operating point sensitive to rotation, and the second modulation frequency in isolation biases the rotation signal at an operating point insensitive to rotation. One or more control integrated circuits (ICs) isolate a first portion of the rotation signal associated with the first modulation frequency and a second portion of the rotation signal associated with the second modulation frequency. The control ICs determine a difference between the first and second portions of the rotation signal to remove one or more bias instabilities from the first portion of the rotation signal.

Various examples of a closed-loop optical gyroscope are disclosed. The closed-loop optical gyroscope includes a broadband light source configured to generate broadband optical signal(s). The broadband optical signal(s) propagate in an optical resonator and are coupled in and out of the optical resonator by optical couplers. A phase modulator applies phase modulation to the optical signal(s) based on a sawtooth modulation signal. The optical signal(s) repropagate in the optical resonator in a different direction. The optical signal(s) are then received and analyzed to determine parameter(s) of the phase modulator. One or more processors configure the phase modulator based on the determined parameter(s).

An interferometric resonator optical gyroscope includes an optical frequency comb generator configured to generate an optical frequency comb. Optical signals representative of the optical frequency comb pass through an optical resonator in different directions, and a rotation rate is determined based on the extent of interference between the optical signals. Parameters of the optical frequency comb generator can be controlled by a control servo based on an intensity of the optical signals after propagating in the optical resonator. Utilizing an optical frequency comb generator reduces the bias error during gyroscope operation.

The present invention discloses an optical gyroscope integrated chip based on a thin-film lithium niobate photonic integrated platform. The overall structure adopts a hybrid curved waveguide with multiple parts of continuously variable curvature, which reduces the insertion loss caused by the mode field mismatch between the straight waveguide and the curved waveguide at the junction, reduces the excitation of high-order modes, and helps to reduce the overall size of the chip. In addition, the curved waveguide increases the polarization extinction ratio of the chip and filters out quasi-TE 00 The present invention utilizes waveguide mode leakage to achieve single-mode, single-polarization operation of the lithium niobate waveguide. The single-TE mode lithium niobate waveguide on the entire chip, excluding the curved waveguide of the folded modulator and the coupler, forms a waveguide polarizer with a high polarization extinction ratio. This allows on-chip single-mode, single-polarization operation to be achieved without the need for an additional polarizer design, effectively reducing chip complexity, improving chip stability, and reducing chip size.

The present invention provides an integrated interferometric optical gyroscope, assembly, system, and method for calculating rotational speed, the gyroscope comprising a light source module, a first coupling module, a second coupling module, at least two polarization-separated rotation modules, a photoelectric detection module, and a helical waveguide module, the two polarization-separated rotation modules each connected to the distal and proximal ends of the helical waveguide module, each converting two optical beams in a TE polarization state into two polarization states, TE and TM, transmitting them to both ends of the helical waveguide module, transmitting them in opposite directions within the helical waveguide module, receiving the two optical beams after they have passed through the helical waveguide module, and converting both polarization states back to the same TE mode, the gyroscope does not use a circulator or 50 / 50 coupler, avoids reflected light waves to the light source, and eliminates the influence of system errors, drift or disturbances, changes in ambient temperature, etc. on the performance stability of the gyroscope.

The invention discloses a novel reciprocity resonance interference combined type integrated optical gyroscope sensing and detection method, and belongs to the field of integrated optical gyroscopes. Firstly, an integrated optical gyroscope optical path sensing module is built, light emitted by a laser is split and modulated after sequentially passing through a circulator and a phase modulator and is split again after passing through a straight-through end coupler of a resonant cavity, two light beams are output to a photoelectric detector I and a photoelectric detector II after passing through an isolator from a straight-through end, and the other two light beams are output from a transmission end after entering the cavity for resonance; the light returns to the circulator for light combination interference and is output to a photoelectric detector III; generating a laser frequency locking signal by using light output from the straight-through end, and returning the laser frequency locking signal to the laser to form a closed loop so as to complete establishment of a laser frequency locking detection module; after the laser locks the resonant frequency of the resonant cavity, light is output from the transmission end, construction of a differential interference sensitive angular velocity detection module is completed, and the final gyro angular velocity is output. The invention solves the problem that the optical path scheme of the resonant gyroscope is not reciprocal and is easily influenced by environment temperature change.

The invention provides an angular velocity detection system and method based on weak measurement, which can be applied to the technical field of quantum sensing and the technical field of optical gyroscopes. The system comprises a laser emitting initial light; the front selection module performs phase adjustment on two parts of light in the initial light; the first optical resonant cavity transmits the first path of light along an anticlockwise path; the second optical resonant cavity transmits the second path of light along a clockwise path; the post-selection module couples the first path light with a first part of light in the second path light to obtain first interference light; the detection module detects the first interference light to obtain first light intensity; the processor obtains a linear coefficient according to the preset phase, the initial light intensity of the initial light and the transmission coefficient; according to the first light intensity, the linear coefficient and the preset phase, the rotation angular velocity is obtained, the optical microcavity serves as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is enhanced through the weak measurement technology, and the detection precision of the rotation angular velocity is improved.

The present invention discloses a multi-longitudinal mode selection and stabilization control system for a large optical gyroscope for time service, belonging to the technical field of high-precision optical gyroscopes. It includes an annular cavity formed by a prism, a mirror and a partial mirror, and a stable mode servo control loop. The annular cavity is composed of two prisms, a mirror and a partial mirror to form a square symmetric structure. Each prism, mirror and partial mirror is arranged in a metal sealed cabin. A helium-neon gas gain tube is also arranged between the metal sealed cabins of the mirror and the partial mirror. The inside of the helium-neon gas gain tube is filled with helium-neon gas with a mixing ratio of He:Ne = 9:1. The Ne element uses a dual-isotope mixture of Ne<supgt;20< / supgt; and Ne<supgt;27< / supgt>, and the mixing ratio is Ne<supgt;20< / supgt;:Ne<supgt;27< / supgt> = 1:9. External diaphragms are also assembled on the two prisms. The present invention adopts the above multi-longitudinal mode selection and stabilization control system for a large optical gyroscope for time service, and realizes the extreme asymmetric control of the laser intensity tuning curve profile by controlling the gain and loss of the laser.

A chip for an optical gyroscope and an optical gyroscope including the chip. The chip includes a substrate having a substrate body with an upper surface; a waveguide on the upper surface of the substrate, the waveguide comprising a waveguide core immovably attached to the substrate; a pair of waveguide recesses formed in the substrate body and opening through the upper surface, the waveguide core being disposed between the pair of waveguide recesses; a ring resonator on the upper surface of the substrate and spaced from the waveguide, the ring resonator comprising a ring resonator core immovably attached to the substrate; and a pair of ring recesses formed in the substrate body and opening through the upper surface, the ring resonator core being disposed between the pair of ring recesses.

The invention discloses an all-normal dispersion super-continuum spectrum driven resonant optical gyroscope and a working method thereof, and belongs to the field of optical gyroscopes. The input end of the mode-locked laser ML is connected to a left port of the full-normal dispersion photonic crystal fiber ANDi-PCF, input ports of the full-normal dispersion photonic crystal fiber ANDi-PCF and the photoelectric detector PD are connected to two left ports of the circulator CIR respectively, and a right port of the circulator CIR is connected with a left port of the multifunctional integrated optical chip MIOC. And two ports on the right side of the multifunctional integrated optical chip MIOC are respectively connected with two ports of the waveguide ring resonator WRR. Based on the resonance mode of the full-normal dispersion super-continuum spectrum excitation waveguide ring resonator, the influence of relative intensity noise and shot noise on the gyroscope performance is further reduced by using the broadband and smooth light source spectrum pattern, and finally the angle random walk of the gyroscope is promoted.

The present invention discloses a lithium niobate thin film modulator connected to an integrated optical gyroscope system, belonging to the field of integrated optical gyroscopes; the device comprises a silicon substrate, upper and lower silicon dioxide claddings, an integrated lithium niobate thin film modulator, and a modulation electrode; the transmission optical path is divided into an input coupling optical path, a beam splitting optical path, a modulation optical path, a single-mode output optical path, and an output coupling optical path. The beam splitting optical path waveguide comprises a 1-to-2 multimode interference coupler structure and a curved waveguide structure, which evenly divides the light into two light beams with a power ratio of 1:1 for output; the modulation optical path waveguide comprises a beam splitting-modulation tapered waveguide, a modulation waveguide, and a modulation electrode, which achieves high modulation while having low absorption loss; the single-mode output optical path waveguide comprises a multimode-single-mode tapered waveguide and a single-mode output waveguide, which achieves low-loss single-mode output; the input and output coupling optical paths are designed with a double-layer tapered waveguide structure according to the size of the input and output coupling mode spots, which achieves low-loss end-face coupling. The present invention has the characteristics of low loss, integrability, and single-mode output.

The present invention primarily relates to a compound of formula (I) as defined herein and to a mixture comprising or consisting of one or more compound(s) of formula (I) as defined herein and optionally one or more host material(s). Moreover, the present invention relates to the compounds of formula (II) to (VIII) as defined herein and to further specific compounds as defined herein. The present invention also relates to an electro-optic film and an electro-optic modulator-device as defined herein and to a method for manufacturing an electro-optic modulator-device comprising or consisting of the steps as defined herein. Lastly, the present invention relates to the use of a compound of formula (I) or of a mixture as defined herein or of an electro-optic film as defined herein or of an electro-optic modulator-device as defined or as manufactured herein in a field selected from the group consisting of nonlinear optics, Mach-Zehnder modulators, silicon organic hybrid electro-optic modulators, materials for devices or arrangements for the control of the intensity, color, phase, polarization or direction of light arriving from an independent light source, preferably switching, gating, or modulating, photonic communication networks, optical data transmission, preferably in 6G applications, phased array radars, satellite and fiber telecommunications, cable television (CATV), optical gyroscopes for application in aerial and missile guidance, electronic counter measure (ECM) systems, backplane interconnects for high-speed computation, ultra-quick analog-to-digital conversion, land mine detection, radio frequency photonics, programmable photonics, cryo-communications, quantum computing, spatial light modulation, and all-optical (light-switching-light) signal processing.

The invention discloses an on-chip programmable multiplexing waveguide ring based on thin film lithium niobate, which comprises a thin film lithium niobate chip, a first TE mode straight waveguide, a first polarization beam splitting rotator, a first TE mode bent waveguide, a first polarization independent short waveguide, a first TE / TM mode controllable converter, a second TE mode straight waveguide, a second polarization beam splitting rotator, a second TE mode bent waveguide, a second polarization independent short waveguide and a second TE / TM mode controllable converter are integrated on the thin film lithium niobate chip. Through the structural combination, the programmable multiplexing on-chip integrated waveguide ring function can be realized, so that the functions of adjustable optical delay length, adjustable on-chip integrated waveguide ring and the like can be realized, and the programmable multiplexing on-chip integrated waveguide ring can be widely applied to the fields of microwave photon adjustable optical delay, on-chip optical gyroscopes and the like.

The application belongs to the field of optical gyroscopes, and particularly relates to a wide-spectrum light source driven resonant optical gyroscope based on light intensity fluctuation feedback technology and a RIN suppression method thereof. The light source ASE is connected with a No.1 port of a circulator CIR, the No.2 port of the circulator CIR is connected with a micro integrated optical waveguide modulator MIOC, the tail end of the micro integrated optical waveguide modulator MIOC is connected with one end of a coupler C1 and one end of a coupler C2 respectively, the other end of the coupler C1 and the other end of the coupler C2 are connected with a fiber resonant cavity FRR respectively to realize multi-turn transmission of light in the fiber resonant cavity FRR; the polarization maintaining optical fiber extended from the right transmission end of the coupler C2 is connected with the No.3 output end of the circulator CIR after 90-degree fusion, and then connected with one side of a coupler C3, and the light intensity signal output by the coupler C3 is detected by a photodetector PD, and then output as a rotation value after passing through a lock-in amplifier LIA and a low-pass filter LPF. The application can actively suppress the light intensity fluctuation caused by the light source at a specific frequency.

An integrated photonic optical gyroscope made on a silicon nitride (SiN) waveguide platform includes a first straight waveguide to receive incident light and output emergent light to couple to a photodetector to provide an optical signal for rotational sensing. The gyroscope includes a first microresonator ring adjacent a first straight waveguide. Light is evanescently coupled from the first straight waveguide to the first microresonator ring and experiences propagation losses when circulating within the first microresonator ring as a guide beam. The guide beam is evanescently coupled from the first microresonator ring back to the first straight waveguide to provide an optical signal for rotational sensing after passing optical gain to the guide beam to counteract propagation loss. In a coupling ring configuration, a first microresonator ring acts as a loss ring, while optical gain is passed to a second microresonator ring that acts as a gain ring.

This invention proposes a resonant micro-optical gyroscope based on a variable fiber beam splitter and its closed-loop control method, belonging to the field of resonant optical gyroscope technology. It includes a laser, a variable fiber beam splitter, phase modulators PMⅠ and PMⅡ, circulator Ⅰ and circulator Ⅱ, a 95% 2×2 coupler, photodetectors PDⅠ and PDⅡ, a whispering-gallery resonator, a digital-to-analog interface, a digital system, and an analog-to-digital interface. This invention achieves a dual-closed-loop structure by designing a Schmitt-type closed-loop switching, a linear region judgment scheme, and an automatic reset operation, thereby improving the linearity and dynamic range of the ROG output.

A technique is provided for reducing angle random walk (ARW) noise in a resonant optical gyroscope (ROG) using a pair of optical frequency combs. The ARW noise is reduced by propagating each optical frequency comb through a dispersive optical component. As a result, at least some of the spectral components, of an optical frequency comb emitted from a dispersive optical component, are no longer phase locked. As a result, ROG rotation rate accuracy is increased.

The invention discloses an integrated chip for a silicon nitride-based optical gyroscope, the optical gyroscope and a working method of the optical gyroscope, and belongs to the field of photoelectric integration, and the integrated chip comprises a wide-spectrum light source tube core, a polarizer, a beam splitter, a phase modulator, a spot size converter and a photoelectric detector which are integrated on the same S < O2 > substrate and are sequentially arranged along the light propagation direction, the beam splitter, the polarizer, the phase modulator and the spot-size converter are all composed of S N waveguides, so that the beam splitter, the polarizer, the phase modulator and the spot-size converter are sequentially and optically interconnected through the S N waveguides. By adopting the integrated chip for the silicon nitride-based optical gyroscope, the optical gyroscope and the working method of the optical gyroscope, the performance of the optical gyroscope is remarkably improved and the application range of the optical gyroscope is remarkably expanded through highly-integrated, multi-band compatible and high-performance components, three-axis synchronous measurement and reliable system design; the design has important value in the key fields of inertial navigation, aircraft attitude control and the like due to high integration level, high precision and high reliability.

The present application relates to the technical field of integrated optical gyroscopes, and particularly relates to a method and system for sensing angular velocity based on double silicon-based micro-ring resonance demodulation. The method comprises the following steps: a driving circuit drives broadband light emitted by an on-chip light source to be coupled into an on-chip silicon-based optical waveguide through an input grating; the broadband light is modulated into narrowband light after passing through a first silicon-based micro-ring; the narrowband light enters a silicon-based sensing ring, and the narrowband light generates Sagnac frequency shift when the silicon-based sensing ring rotates; a second silicon-based micro-ring changes a channel frequency band through electrical modulation, and resonance demodulation is achieved when the channel frequency band matches the frequency of the narrowband light signal after frequency shift; the demodulated optical signal enters an on-chip detector through an output grating and is converted into an electrical signal, and the initial angular velocity of a carrier platform is demodulated after being processed by a demodulation circuit. The present application realizes high-sensitivity sensing of angular velocity based on double silicon-based micro-ring resonance demodulation; and provides a theoretical basis and technical support for the development of integrated optical gyroscopes with the advantages of high sensitivity, miniaturization, chipization and low cost.

An integrated photonic optical gyroscope fabricated on a silicon nitride (SiN) waveguide platform includes a first straight waveguide that receives incident light and outputs an output light to be coupled to a photodetector to provide an optical signal for rotation sensing. The gyroscope includes a first microresonator loop adjacent to the first straight waveguide. Light is evanescently coupled from the first straight waveguide to the first microresonator loop and experiences propagation loss while circulating as a guided beam within the first microresonator loop. The guided beam is evanescently coupled back from the first microresonator loop to the first straight waveguide to provide an optical signal for rotation sensing after optical gain is transferred to the guided beam to counteract the propagation loss. In a coupled loop configuration, the first microresonator loop acts as a loss loop while optical gain is transferred to a second microresonator loop that acts as a gain loop.

A gyroscope comprises first and second light sources that emit first and second beams with broadband spectrums, and a waveguide arrangement that communicates with the light sources. A resonator communicates with the waveguide arrangement to receive the beams. A first circulator is coupled to the waveguide arrangement between the first light source and the resonator. A second circulator is coupled to the waveguide arrangement between the second light source and the resonator. A first rate detector communicates with the resonator through the first circulator, and a second rate detector communicates with the resonator through the second circulator. The rate detectors produce rate measurements based on a detected resonance frequency shift of the beams in the resonator caused by rotation of the gyroscope. Outputs of the rate detectors are used to calculate a rotation rate that is corrected for errors due to a time varying pathlength change in the resonator.

Embodiments utilize an optical frequency comb generator coupled to an optical resonator of an optical gyroscope. The optical frequency comb generator generates an optical frequency comb having frequency peaks that each correspond to a respective resonance frequency of the optical resonator. A control servo can be coupled to the optical frequency comb generator and controls the optical frequency comb output from the optical frequency comb generator. In doing so, the optical frequency comb remains tuned to the resonance frequencies of the optical resonator during gyroscope operation.