Title: Method for simultaneously determining reflectivity of high reflection cavity mirror and detection mirror
Application Number: 200610114363 Application Date: 2006.11.08
Publication Number: 1945252 Publication Date: 2007.04.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01M11/02;G01N21/55
Applicant(s) Name: Inst. of Optics and Electronics, CAS Address:
Inventor(s) Name: Gong Yuan;Li Bincheng
Attorney & Agent: jiayu zhong luji
Abstract:
    The method of determining the reflectivity of high reflectivity cavity lens and testing mirror simultaneously includes the following steps: projecting strength modulated continuous laser beam to a stable resonator comprising two high reflectivity plane-concave cavity lenses and measuring the amplitude and phase of the first harmonic of the optical cavity output signal; maintaining the cavity length unchanged, adding high reflectivity testing mirror to constitute folding cavity and repeating the foregoing step to obtain the amplitude and phase in corresponding frequency; obtaining the amplitude ratio and phase difference of the corresponding frequency; and obtaining the fitting curve of the amplitude ratio and phase difference to modulation frequency or calculating in two frequency points to obtain the reflectivity of the cavity lens and the reflectivity of the testing mirror. The present invention has high measurement efficiency and high measurement precision.
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