Sensitive absorption-line characterization and Fabry-Perot fringing reduction in modulation spectroscopy

Amin N. Dharamsi; Audra Michelle Bullock; Patrick C. Shea

doi:10.1117/12.308670

27 May 1998 Sensitive absorption-line characterization and Fabry-Perot fringing reduction in modulation spectroscopy

Amin N. Dharamsi, Audra Michelle Bullock, Patrick C. Shea

Proceedings Volume 3265, Solid State Lasers VII; (1998) https://doi.org/10.1117/12.308670
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

Theoretical and experimental results are presented to show that the etaloning problem in wavelength modulation experiments can be overcome by using harmonic detection that is greater than the commonly used second. The conditions under which such an advantage is obtained are discussed. Since the fringes due to parasitic Fabry-Perot etalons often place a limit to the ultimate sensitivity of such experiments, the method discussed has applications wherever sensitivity has to be increased. The method of higher harmonic detection is an alternative to synchronous mechanical jittering of an offending optical element that has been used in the past to average out the fringes.

Citation Download Citation

Amin N. Dharamsi, Audra Michelle Bullock, and Patrick C. Shea "Sensitive absorption-line characterization and Fabry-Perot fringing reduction in modulation spectroscopy", Proc. SPIE 3265, Solid State Lasers VII, (27 May 1998); https://doi.org/10.1117/12.308670

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