Double closed-loop resonant micro optic gyro using hybrid digital phase modulation

Ma, Huilian; Zhang, Jianjie; Wang, Linglan; Jin, Zhonghe

doi:10.1364/oe.23.015088

Cited by 52 publications

(11 citation statements)

References 20 publications

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“…It gives us grounds to expect that the quantum effects can be observed with this type of devices. On the other hand, the demonstrated measurement sensitivity of the existing micro-gyroscopes [17][18][19][20][21][22][23][24][25] is not very high. It was shown that an on-chip gyroscope having resolution on the order of 10 deg/hr is feasible if an InP-based ring cavity with Q factor of approximately 6×10 5 and footprint of 10 mm 2 is utilized [26].…”

Section: Discussionmentioning

confidence: 97%

Gyroscope as quantum angular speed meter

Matsko,

Vyatchanin

2018

Preprint

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We found that the measurement sensitivity of an optical integrating gyroscope is fundamentally limited due to ponderomotive action of the light leading to the standard quantum limit of the rotation angle detection. The uncorrelated quantum fluctuations of power of clockwise and counterclockwise electromagnetic waves result in optical power-dependent uncertainty of the angular gyroscope position. We also show that, on the other hand, a quantum back action evading measurement of angular momentum of a gyroscope becomes feasible if proper measurement strategy is selected. The angle is perturbed in this case. This observation hints on fundamental inequivalency of integrating and rate gyroscopes.

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Section: Discussionmentioning

confidence: 97%

Gyroscope as quantum angular speed meter

Matsko,

Vyatchanin

2018

Preprint

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“…For example, a 10-fold improvement in linewidth would place the sensitivity in the range of a few degrees/hour. The X-band-rate beat frequency produced by the counterpropagating Brillouin waves presents challenges with respect to gyroscope bias stability and drift [13]. Current efforts are focused on addressing these environmental-drift-related issues.…”

Section: Lettermentioning

confidence: 99%

Microresonator Brillouin Gyroscope

Suh

Vahala

2015

Nonlinear Optics

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Optical-based rotation sensors have revolutionized precision, high-sensitivity inertial navigation systems. At the same time these sensors use bulky optical fiber spools or free-space resonators. A chip-based, micro-optical gyroscope is demonstrated that uses counterpropagating Brillouin lasers to measure rotation as a Sagnac-induced frequency shift. Preliminary work has demonstrated a rotation-rate measurement that surpasses prior micro-optical rotation-sensing systems by over 40-fold. Inertial sensors for rotation are used widely in commercial and military systems. Driven by applications in consumer electronics and miniature satellites, there has been intense interest in compact, lightweight sensors that can be integrated with electronics. MEMS-based sensors have captured this miniature lightweight application space, but do not provide sensitivity and bias stability that competes with ring laser gyros [1] and fiber-optic gyros [2]. Moreover, due to their mechanical nature, MEMS-based devices are less immune to shock and vibration [3]. The prospect of applying micro-fabrication methods to optical-based gyro systems is therefore appealing, both because it addresses environmental concerns (even beyond conventional optical gyro systems) and it might offer performance that exceeds MEMS-based systems. A new class of micro-optical gyro is demonstrated that uses counterpropagating Brillouin lasers in a chip-based optical resonator to measure rotation as a frequency shift [4]. Preliminary work has measured sinusoidal rotations with rates as low as 22 deg/h, which surpasses prior experimental micro-optical systems by over 40-fold [5,6].A Brillouin laser ring gyro (BLRG) was studied in the 1990s using an optical fiber resonator [7]. Brillouin scattering in silica optical fiber results from the interaction of an optical pump wave with microwave-rate phonons [8]. At sufficiently high pump intensities, the process amplifies counterpropagating waves residing within a narrow frequency band (about 50 MHz wide) that is downshifted relative to the pump frequency by 10-11 GHz (for pumping near 1.55 μm). In a resonator, this amplification can overcome round-trip losses to produce a lasing Stokes wave. In the BLRG, a fiber ring resonator was bidirectionally pumped to excite two counterpropagating Brillouin lasers [7]. Upon rotation of the resonator, these counterpropagating lasers experienced opposing frequency shifts caused by the Sagnac effect [9]. Heterodyne detection of the two laser signals allowed measurement of the rotation rate. As in a conventional ring laser gyro, the counterpropagating laser lines produce a narrow-linewidth beatnote on account of laser action in a high-Q cavity. Co-lasing within a common resonator also tends to cancel technical noise contributions to the beatnote linewidth.In this work, the Brillouin laser cavity is a high-optical-Q micro resonator that measures only 18 mm in diameter and is fabricated of silica on a silicon chip [10]. Also, the method of excitation relies on a single pump wave to induce...

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“…However, the amplitude of the output of PD2 is proportional to the rotation rate [12]. Different phase modulation techniques have already been studied, such as the single-phase modulation technique [13][14][15], the double-phase modulation technique [16][17][18], and the hybrid-phase modulation technique [19,20].…”

Section: Introductionmentioning

confidence: 99%

Progress of Waveguide Ring Resonators Used in Micro-Optical Gyroscopes

Feng

Yan

et al. 2020

Photonics

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Micro-optical gyroscopes (MOGs) are a type of high-accuracy gyroscope, which have the advantages of miniaturization, low cost, and satisfactory operating power. The quality factor (Q) of the waveguide ring resonators (WRRs) is very important to the performance of MOGs. This paper reviews various MOGs using WRRs made from different materials, including silica, indium phosphide, calcium fluoride, and polymer WRRs. The different architectures of the MOGs are reviewed, such as double-ring resonator MOGs and multiple-ring resonator MOGs. Candidate high-Q WRRs for MOGs, including silicon nitride, lithium niobite, calcium fluoride, and magnesium fluoride WRRs, are also reviewed. The manufacturing process, Q, and integration density values are compared. Summarizing the advanced WRRs and calculating the shot-noise-limited sensitivity are helpful processes in selecting suitable materials to fabricate MOGs.

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Double closed-loop resonant micro optic gyro using hybrid digital phase modulation

Cited by 52 publications

References 20 publications

Gyroscope as quantum angular speed meter

Gyroscope as quantum angular speed meter

Microresonator Brillouin Gyroscope

Progress of Waveguide Ring Resonators Used in Micro-Optical Gyroscopes

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