Resonance asymmetry induced bias errors in waveguide type optical passive resonator gyro.

We present an in-depth analysis of the resonance asymmetry in a silica waveguide ring resonator (WRR) and its influence on the waveguide-type optical passive resonator gyro (OPRG). A big bias error appears at the output of the OPRG. This big error is caused not only by the resonance asymmetry in the WRR, but also by the modulation parameters in the phase modulation spectroscopy technique (PMST). It has been proved that the bias error is proportional to the modulation frequency difference between the clockwise (CW) and counterclockwise (CCW) lightwaves. Three types of resonance asymmetries are thoroughly introduced and discussed. Methods to overcome the big bias error are demonstrated. A high reciprocal resonator is crucial to reduce the bias error. For a certain resonator, a proper temperature needs to be set to minimize the resonance asymmetry. A proper modulation frequency difference between the CW and CCW lightwaves is also helpful to reduce the bias error.

[1]  Kyriacos Kalli,et al.  Analysis of the dynamic response of a ring resonator to a time-varying input signal. , 1993, Optics letters.

[2]  Shaoul Ezekiel,et al.  Passive ring resonator laser gyroscope , 1977 .

[3]  Zhonghe Jin,et al.  Waveguide-type optical passive ring resonator gyro using phase modulation spectroscopy technique , 2006 .

[4]  Zhonghe Jin,et al.  Polarization maintaining silica waveguide resonator optic gyro using double phase modulation technique. , 2011, Optics express.

[5]  George A. Pavlath,et al.  Fiber optic gyros: the vision realized , 2006, SPIE Optics + Photonics.

[6]  Zhonghe Jin,et al.  Resonance asymmetry phenomenon in waveguide-type optical ring resonator gyro , 2012 .

[7]  J. Vinet,et al.  Kerr effect in all-fiber cavities of optical gyros. , 1990, Applied optics.

[8]  Kazuo Hotate,et al.  Applications and Technical Progress of Fiber Optic Gyros in Japan , 2006 .

[9]  Feng Zhang,et al.  Direct-coupling single-mode fiber ring resonator , 1988 .

[10]  H. J. Shaw,et al.  Effects of normal mode loss in dielectric waveguide directional couplers and interferometers , 1983 .

[11]  Glen A. Sanders.  Critical review of resonator fiber optic gyroscope technology , 1993, Optics East.

[12]  Robert P. Dahlgren,et al.  Theoretical comparison of low- and high-splitting ratio resonators , 1994, Other Conferences.

[13]  Zhonghe Jin,et al.  Resonator micro optic gyro with double phase modulation technique using an FPGA-based digital processor , 2012 .

[14]  Zuyuan He,et al.  Reduction of Backscattering Induced Noise by Carrier Suppression in Waveguide-Type Optical Ring Resonator Gyro , 2011, Journal of Lightwave Technology.

[15]  Kazuo Kyuma,et al.  Nondestructive measuring technique for misaligned angle in polarisation-maintaining fibre coupler , 1989 .