Patent ID: 7271915
Filing Date: 2007-09-18
Classification: G01C

Abstract:
1. A system for off-mode-peak operation of a gas tube-style laser gyroscope, comprising: a laser gyroscope; a laser intensity monitor, an input of said laser intensity monitor coupled to at least one optical cavity of said laser gyroscope; an offset error injector, an input of said offset error injector coupled to an output of said laser intensity monitor; a phase-sensitive synchronous demodulator, said phase-sensitive synchronous demodulator including a demodulator stage and an integrating amplifier stage, an input of said demodulator stage coupled to an output of said laser gyroscope, an output of said demodulator stage coupled to a first input of said integrating amplifier stage, and an output of said offset error injector coupled to a second input of said integrating amplifier stage; and a voltage drive stage, an output of said integrating amplifier stage coupled to an input of said voltage drive stage, and an output of said voltage drive stage coupled to a drive input of said laser gyroscope, said offset error injector operable to: determine an offset error for an off-mode-peak operation of said laser gyroscope; and inject said offset error into said second input of said integrating amplifier stage so as to drive said drive input of said laser gyroscope to an off-mode-peak operating point of said laser gyroscope.