Drift caused by phase-modulator nonlinearities in fiber gyroscopes

Autor:	Sidney L. Alessi Carrara
Rok vydání:	1990
Předmět:	Physics Offset (computer science) business.industry Birefringent fiber Gyroscope law.invention Optics law Control theory Bias drift A fibers business Frequency modulation Phase modulation Phase-shift keying
Zdroj:	Fiber Optic Sensors IV.
ISSN:	0277-786X
DOI:	10.1117/12.20305
Popis:	Imperfections of a phase modulator driven below the proper modulation frequency of a fiber gyroscope can cause offset of the output signal, limiting long term stability. Bias drift induced by non-linear effects in the phase modulator was studied and altenative ways of stabilizing a short loop length gyro were implemented. Long term drift figures below 0.2°/h rms were achieved in a highly birefringent fiber gyro with a 160 m-long sensing spool.
Databáze:	OpenAIRE
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