Abstract
A simple wavelength-independent scale factor model is established
for a closed-loop interferometer fiber optic gyroscope (IFOG) and a method
to keep the scale factor radiation tolerant and temperature stable in a
high performance IFOG for space application is proposed. The half-wave
voltage (Vπ) of the multifunction gyro chip at different
wavelengths and temperatures is measured and the radiation-independent
inherent parameter of the modulator is picked out and found be
proportional to the temperature and slightly wavelength dependent. An
experimental IFOG is developed and the scale factor is measured at
different temperatures and under Co60 irradiation, respectively. Less than
a 10 ppm scale factor instability is achieved within the −40°C to +60°C
temperature range and more than 100 krad(Si) total radiation
dose.
© 2016 Chinese Laser Press
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