Interrogation of birefingent fiber sensors using non-reciprocal phase modulation

Stephan Wildermuth; Klaus Bohnert; Hubert Brändle

doi:10.1117/12.833589

5 October 2009 Interrogation of birefingent fiber sensors using non-reciprocal phase modulation

Stephan Wildermuth, Klaus Bohnert, Hubert Brändle

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750344 (2009) https://doi.org/10.1117/12.833589
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

A novel reflective fiber interferometer with non-reciprocal phase modulation adapted from Sagnac-type fiber interferometers is used to measure the differential optical phase shift in polarimetric fiber sensors. The sensitive part consists of two birefringent fiber sections with balanced differential group delay. A key element is a 45°-Faraday-rotator that swaps the polarization states of the orthogonal light waves after their round trip through the two fiber sections. An integrated-optic birefringent phase modulator at the detector end of the sensor introduces the non-reciprocal phase modulation. The application of the interferometer to voltage sensing is experimentally demonstrated.

Citation Download Citation

Stephan Wildermuth, Klaus Bohnert, and Hubert Brändle "Interrogation of birefingent fiber sensors using non-reciprocal phase modulation", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750344 (5 October 2009); https://doi.org/10.1117/12.833589

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