Means and method for active dispersion equalization of a multios

Details Means and method for active dispersion equalization of a multios Means and method for active dispersion equalization of a multios

1996-03-11

1998-07-28

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1966

Patent

active

057868956

ABSTRACT:
Based upon the equation, BIAS.sub.G .alpha. (I.sub.DE -I.sub.COIL).multidot.(V.sub.DE -V.sub.OFF), where BIAS.sub.G is the bias of a multi-oscillator ring-laser gyroscope (14) as induced by gain medium dispersion effects, I.sub.DE is the proper operating coil current, I.sub.COIL is the actual coil current, V.sub.DE is the proper path length control operating voltage and V.sub.OFF is the actual offset voltage, V.sub.DE is matched by path length control offset voltage and/or I.sub.DE is matched by proper coil current, to produce a zero induced BIAS.sub.G. Matching, through dispersion equalization (DE), is effected by use of clockwise (C) and anticlockwise (A) (or counterclockwise) beams traversing paths with a frame (12). The beams are directed to photodetectors (52, 54) and power meters (56, 58).

REFERENCES:
patent: 5374990 (1994-12-01), Hahn et al.

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