Behavior of Z-cut quartz etalon for wavelength locker -analysis and experiments of direct cavity modulation of etalon

摘要

The temperature coefficient of the Z-cut quartz etalon that can be used for a wavelength locker of an LD module is only 500 MHz/℃. Since the cavity length of the Z-cut quartz etalons can directly be modulated by the electric field of the X-direction, the LD wavelength can be detected by the synchronous detection without DC drift. This paper presents an analysis of the cavity length modulation of a Z-cut quartz etalon for LD wavelength lockers. The electro-optic effect, piezoelectric effect, photoelastic effect and a mechanical circuit of the etalon with a weight were considered. We also show that the experimental values were in accord with the calculated values.