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Radio frequency excited ring laser gyroscope

  • US 5,196,905 A
  • Filed: 04/06/1990
  • Issued: 03/23/1993
  • Est. Priority Date: 06/22/1988
  • Status: Expired due to Fees
First Claim
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1. A ring laser gyroscope, comprising:

  • a resonant optical cavity formed within a monolithic block, said block defining a closed optical path, defined by at least three legs, having a gain medium therein; and

    ,a closed Radio-Frequency cavity resonator positioned along a portion of said closed optical path, including at least one of said legs, which applies a localized longitudinal radio frequency signal for exciting discharge of the gain medium;

    said closed Radio-Frequency cavity resonator having a helical coil powered up by a power source exhibiting reduced power dissipation surrounding a portion of said closed optical path; and

    ,said helical coil contained within an enclosed conductive resonator shield, said helical coil and enclosed conductive resonator shield forming a high-Q, distributed parameter coaxial Radio-Frequency resonator assembly, and substantially aligned according to the following equations;

    
    
    space="preserve" listing-type="equation">Q.sub.u =50 D f.sub.o.sup.1/2 ;

    and,
    
    
    space="preserve" listing-type="equation">N=(1900/f.sub.o D) turns;

    where,Qu is unloaded Q (quality factor);

    D is the inside diameter of the resonator shield;

    fo is a resonant frequency (MHz) of said resonator assembly; and

    ,N is the total number of windings of said helical coil.

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