Novel method to stabilize a laser wavelength unaffected by Fabry-Perot etalon angle drift

Mao-Sheng Huang; Mao-Hong Lu; Jow-Tsong Shy

doi:10.1117/1.1690278

1 May 2004 Novel method to stabilize a laser wavelength unaffected by Fabry-Perot etalon angle drift

Mao-Sheng Huang, Mao-Hong Lu, Jow-Tsong Shy

Author Affiliations +

Optical Engineering, Vol. 43, Issue 5, (May 2004). https://doi.org/10.1117/1.1690278

Abstract

A laser with its wavelength stabilized to a Fabry-Perot etalon has many industrial applications. An ideal error signal for laser stabilization is the dispersion-like signal generated without wavelength modulation. We present a technique, by which the error signal is generated by the difference of two resonance peaks of a Fabry-Perot etalon. A laser beam is split into two beams, which pass through an etalon with a small optical path length difference to generate two partially overlapped resonance peaks. Subtracting one peak from the other yields a dispersion-like error signal. The zero crossing of the differential signal is insensitive to the angle drift of the etalon if the incident angles of the two laser beams are nearly equal but with opposite sign.

©(2004) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Mao-Sheng Huang, Mao-Hong Lu, and Jow-Tsong Shy "Novel method to stabilize a laser wavelength unaffected by Fabry-Perot etalon angle drift," Optical Engineering 43(5), (1 May 2004). https://doi.org/10.1117/1.1690278

Published: 1 May 2004

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