Ultralow-noise broadband source for interferometric fiber opticgyroscopesemploying a semiconductor optical amplifier
2021
A novel scheme of an ultralow relative intensity noise (RIN)
broadband source module employing a double pumped backward (DPB) Er-doped
superfluorescence fiber source (EDSFS) and a semiconductor optical
amplifier for interferometric fiber optic gyroscopes (IFOGs) is proposed.
With optimized parameters, the optimal twin-peak output profile of the
source is obtained. The effective optical spectrum width of the source is
38.6 nm, and the output power is about 12.5 mW. Compared with the DPB
EDSFS with a similar spectrum, the ultralow RIN broadband source proposed
demonstrates a lower RIN of about 8.4 dB. A high-precision IFOG utilizing
the ultralow RIN broadband source is set up, and the performance of the
IFOG is experimentally studied. An angle random walk coefficient of
6.93×10−5o/h1/2 is demonstrated, which
is reduced by about 31.5% compared with the same IFOG system utilizing
conventional DPB EDSFS with a similar spectrum profile. The ultralow RIN
broadband source module proposed is quite feasible for high-precision
IFOGs used in strategic-grade navigation systems and
satellites.
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