Fizeau Wavemeter

James J . Snyder

doi:10.1117/12.932052

30 December 1981 Fizeau Wavemeter

James J . Snyder

Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932052
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States

Abstract

The Fizeau Wavemeter is a real-time laser-wavelength measuring instrument intended for use with either pulsed or cw lasers. The instrument contains a static Fizeau interferometer which is illuniinated by the laser. The fringe pattern of the interferometer is sampled by a 1024 element photodiode array and analyzed by a small computer to determine the wavelength of the illuminating laser. An earlier version of the instrumentl demonstrated a resolution of 10 ^-⁷ (about 50 MHz in the visible) at a read-out rate of 15 Hz, but suffered from systematic drifts in the calibration. Recent modifications in the software 2 and in the optical system have virtually eliminated. sensitivity to fringe amplitude non-uniformity and to wavefront curvature. Temperature sensitivity has been reduced to a level commensurate with the coefficient of thermal expansion of the interferometer spacer.

Citation Download Citation

James J . Snyder "Fizeau Wavemeter", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932052

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