Research/Patents/US 4963026
US 4963026Tier 2 — Research Body

CAVITY LENGTH CONTROL APPARATUS FOR A MULTI-OSCILLATOR

Assignee

Litton Systems

Filed as: LITTON SYSTEMS, INC., A CORP. OF DE

Filed

Mar 14, 1988

Granted

Oct 16, 1990

Location

NORTH HOLLYWOOD CA US

Abstract

An apparatus and method for controlling the length of a multioscillator cavity. A photodiode mixes a pair of beams rotating in the same direction, one of said beams being substantially left circularly polarized, and the other beam being substantially right circularly polarized. A local oscillator causes the mixed beams to be modulated. An amplitude demodulator demodulates the modulated beams. An error detecting device responds to the amplitude demodulators, and an active integrator integrates the detected error. A piezotransducer responds to the output of the integrator for controlling the length of the multioscillator cavity.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 18, 1989

Rescinded

Feb 15, 1989

Duration

28 days

Inventor

  • 1TAE W. HAHN

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records