Abstract

It has been demonstrated that a 1.5-μm distributed feedback InGaAsP laser can be used as a coherent light source in a passive ring cavity-type fiber gyroscope. A formula for the detector shot noise-limited sensitivity of detection of rotation was derived for this type of gyroscope. Its value in the present experimental setup was estimated as being 0.8 · τ^1/2 degree/hour, where τ represents the integration time of measurements. Experiments showed that the uncertainty of the detection of rotation was 1.5°/h at τ = 100 s, which was governed by the slight reflection of light at the AR-coated fiber edges and residual frequency fluctuations of the laser.

© 1987 Optical Society of America

Trace gas detection using 1.3–μm InGaAsP diode laser transmitter modules

Daniel T. Cassidy
Appl. Opt. 27(3) 610-614 (1988)

Heterodyne fiber-optic gyroscope using orthogonally polarized two-frequency beams

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Trace gas detection with short-external-cavity InGaAsP diode laser transmitter modules operating at 1.58 μm

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Passive fiber optic gyroscope

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Frequency modulation spectroscopy at 1.3 μm using InGaAsP lasers: a prototype field instrument for atmospheric chemistry research

T. J. Johnson, F. G. Wienhold, J. P. Burrows, and G. W. Harris
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