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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Polarization maintaining silica waveguide resonator optic gyro using double phase modulation technique.

Hui Mao1, Huilian Ma, Zhonghe Jin

  • 1Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China.

Optics Express
|March 4, 2011
PubMed
Summary

A novel double phase modulation technique (DPMT) enhances resonator micro optic gyros (RMOGs) by significantly improving carrier suppression. This advancement reduces backscattering errors, achieving a record bias stability for waveguide passive ring resonator gyros.

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Area of Science:

  • Photonics and Optical Engineering
  • Inertial Sensing Technologies

Background:

  • Resonator micro optic gyros (RMOGs) are crucial for compact, lightweight, and robust inertial sensing.
  • Traditional single phase modulation techniques (SPMT) in passive ring resonator gyros face limitations in carrier suppression due to backscattering noise, requiring precise modulation index control and high temperature stability.

Purpose of the Study:

  • To introduce and evaluate a double phase modulation technique (DPMT) for RMOGs to enhance carrier suppression and reduce backscattering noise.
  • To investigate the relaxed requirements for modulation index control and temperature stability offered by DPMT compared to SPMT.

Main Methods:

  • Implementation of a DPMT in an RMOG, incorporating two additional phase modulations.
  • Analysis and optimization of modulation parameters specific to the DPMT.
  • Experimental demonstration using a polarization-maintaining silica waveguide resonator.

Main Results:

  • The DPMT significantly improves carrier suppression, relaxing control accuracy and temperature stability requirements by over 30 times.
  • Achieved reduction of backscattering error below the shot-noise-limited sensitivity.
  • Demonstrated a bias stability of 1.85×10⁻⁴ rad/s in a 7.9 cm waveguide resonator.

Conclusions:

  • The proposed DPMT offers a superior approach for carrier suppression in RMOGs, overcoming limitations of traditional SPMT.
  • The achieved bias stability represents a state-of-the-art performance for waveguide-type passive ring resonator gyros.
  • DPMT facilitates the development of highly accurate and robust micro-optic gyroscopes for various applications.