Transmitted power variations in single-mode fiber joints with obliquely polished endfaces

Shah, V.; Curtis, L.; Young, William C.

doi:10.1109/50.39084

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…The resonance asymmetry degree can be reduced by decreasing the reflectance ratio. In the packaging of the WRR with optical fibers, the waveguide end face and the fiber coupling end face should be obliquely polished to make the reflecting surface not perpendicular to the light propagation direction, so as to prevent the backreflection light from forming the guiding mode to continue to propagate in the waveguide [42].…”

Section: Analysis Asymmetry Of the Resonance Curvementioning

confidence: 99%

Asymmetry Analysis of the Resonance Curve in Resonant Integrated Optical Gyroscopes

Yan

et al. 2019

Sensors

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The Resonant Integrated Optic Gyroscope (RIOG) is a type of high accuracy gyroscope based on the Sagnac effect. A symmetrical resonance curve is very important to the performance of the RIOG. To further investigate and design a RIOG with a waveguide ring resonator, an in-depth research of the asymmetric resonance curve and its influence on the RIOG is fully developed. Four possible optical noises inducing the resonance curve asymmetry are analyzed and their mathematic models are established. These four optical noises are the normal mode effect, the backscattering noise, the backreflection noise and the polarization noise. Any asymmetry of the resonance curve will not only induce a large output bias error into the gyro output, but also seriously decrease the frequency discrimination parameter of the demodulation curve. By using a tunable fiber laser, the high aspect ratio silicon nitride WRR and the silicon dioxide WRR were tested. The experiment measured resonance curves can be well fitted with the theoretical simulation results. The experimental results show that a high aspect ratio silicon nitride waveguide can effectively suppress the polarization noise in the RIOG.

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Section: Analysis Asymmetry Of the Resonance Curvementioning

confidence: 99%