Title :
Excess noise in fiber gyroscope sources
Author :
Burns, W.K. ; Moeller, R.P. ; Dandridge, A.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
Excess noise was measured in three potential interferometric fiber gyroscope sources, superluminescent diodes at 0.83 and 1.3 mu m, and a superfluorescent fiber source at 1.06 mu m. All three sources showed limiting signal-to-noise ratios in the 128-132 dB range (1 Hz bandwidth at 100 kHz), in agreement with their measured linewidths. The impact of the excess noise on the fiber gyro random walk coefficient is shown. It is pointed out that the noise source considered is important for interferometric fiber optic gyros because it imposes a limitation that does not arise in optical gyros which use narrowband sources.<>
Keywords :
fibre optic sensors; light interferometers; light sources; noise; superradiance; 0.83 micron; 1 Hz; 1.06 micron; 1.3 micron; excess noise; fiber gyro random walk coefficient; fiber gyroscope sources; fibre gyro noise; interferometric fiber gyroscope sources; linewidths; narrowband sources; noise source; optical gyros; signal-to-noise ratios; superfluorescent fiber source; superluminescent diodes; Bandwidth; Fluctuations; Gyroscopes; Noise measurement; Optical fiber devices; Optical fiber polarization; Optical interferometry; Optical noise; Optical sensors; Superluminescent diodes;
Journal_Title :
Photonics Technology Letters, IEEE
