Analysis of Z-Cut Quartz Etalon with Weight for Wavelength Locker

Shigeru OHSHIMA  Masahide MIYACHI  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.5   pp.1033-1040
Publication Date: 2005/05/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.5.1033
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optoelectronics
wavelength division multiplexing,  frequency stability,  frequency locked loops,  Fabry-Perot resonators,  quartz,  cavities,  modulation,  

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This paper presents an analysis of the cavity length modulation of a Z-cut quartz etalon equipped with a weight for Laser Diode (LD) wavelength lockers. The electro-optic effect, piezoelectric effect and photo-elastic effect are considered, and the mechanical movement of the etalon with a weight is analyzed by using a mechanical circuit. Approximate equations that clearly explain the mechanical force, mechanical resonance frequency, and Q factor of the mechanical resonance are obtained. The mechanism for improving the modulation efficiency by placing a weight is clarified. We also compare the analysis with experimental results, and show that most of the experimental values are in accord with the calculated values.