Wavelength measurement with a Young's interferometer

James J. Snyder; Stephen L. Kwiatkowski

doi:10.1117/1.2030947

1 August 2005 Wavelength measurement with a Young's interferometer

James J. Snyder; Stephen L. Kwiatkowski

Author Affiliations +

Optical Engineering, 44(8), 083602 (2005). doi:10.1117/1.2030947

Abstract

We describe a simple, static, fiber optic laser wavelength meter based on a Young's interferometer. In this wavelength meter, the two sources are provided by unequal-length output fibers from a single-mode 3-dB directional coupler. The cleaved ends of the output fibers are held rigidly at a fixed separation facing a linear sensor array that records the sinusoidally varying fringe pattern. Analysis of the recorded fringe pattern resolves the free-spectral-range ambiguity of the interferometer and provides a high-resolution value for the wavelength of the source. Based on our investigation, we believe that with occasional recalibration, the wavelength meter is capable of an accuracy better than one part in 10⁵.

Citation Download Citation

James J. Snyder, Stephen L. Kwiatkowski, "Wavelength measurement with a Young's interferometer," Optical Engineering 44(8), 083602 (1 August 2005). https://doi.org/10.1117/1.2030947

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