Instrumentation, Measurement, and Metrology

Wavelength measurement with a Young’s interferometer

[+] Author Affiliations
James J. Snyder

Soquel Technology, Inc., 1088 Carole Court, Matthews, North Carolina 28104

Stephen L. Kwiatkowski

Soquel Technology, Inc., 1088 Carole Court, Matthews, North Carolina 28104

Opt. Eng. 44(8), 083602 (August 23, 2005). doi:10.1117/1.2030947
History: Received November 17, 2004; Revised February 21, 2005; Accepted February 22, 2005; Published August 23, 2005
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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.

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© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

James J. Snyder and Stephen L. Kwiatkowski
"Wavelength measurement with a Young’s interferometer", Opt. Eng. 44(8), 083602 (August 23, 2005). ; http://dx.doi.org/10.1117/1.2030947


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