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Applied Optics

Applied Optics


  • Vol. 37, Iss. 24 — Aug. 20, 1998
  • pp: 5777–5781

Dual-purpose, compact spectrometer and fiber-coupled laser wavemeter based on a Wollaston prism

Darren Steers, Wilson Sibbett, and Miles J. Padgett  »View Author Affiliations

Applied Optics, Vol. 37, Issue 24, pp. 5777-5781 (1998)

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A fiber-coupled, compact laser wavemeter based on a modified Wollaston prism has been constructed and evaluated. The path difference between orthogonal polarization states of the input light varies smoothly across the aperture of the prism forming an interferogram in the spatial domain that is recorded with a CCD detector array. A Fourier transform of this interferogram gives the spectral distribution of the incident light. Alternatively, for a narrow-linewidth source a fringe period measurement technique is used to obtain precision measurement of the center wavelength. Using 752 interferogram data points we obtain a wavelength precision of 1 part in 106. The elimination of moving parts from the design makes the recorded interferogram inherently stable.

© 1998 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(300.6360) Spectroscopy : Spectroscopy, laser

Original Manuscript: January 16, 1998
Revised Manuscript: April 27, 1998
Published: August 20, 1998

Darren Steers, Wilson Sibbett, and Miles J. Padgett, "Dual-purpose, compact spectrometer and fiber-coupled laser wavemeter based on a Wollaston prism," Appl. Opt. 37, 5777-5781 (1998)

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