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7 June 2002 Wollaston prism-based digital laser wavelength meter
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Proceedings Volume 4653, WDM and Photonic Switching Devices for Network Applications III; (2002)
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
We present a device designed to measure laser output wavelength and based on Wollaston prisms and Barium borate (BBO) crystal polarizers. The arrangement generates a localized fringe plane perpendicular to the optic axis at which a CCD array is placed; consequently, good spatial coherence of the light is not a critical requirement for effective operation of the device. The interferogram is recorded with a digital camera allowing complete pixel registration, which results in improved accuracy. After calibration of the arrangement, the wavelength can then be measured with a precision of better than 1 part in 105, and has been shown to track changes in the output wavelength of the laser sources used. In addition, the calibrated wavelength meter was found to be able to measure the absolute value of a series of defined laser lines to an accuracy of 0.18% (+/- 0.86nm).
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin J. O'Dwyer and Miles J. Padgett "Wollaston prism-based digital laser wavelength meter", Proc. SPIE 4653, WDM and Photonic Switching Devices for Network Applications III, (7 June 2002);


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