A new fringe-counting wavemeter based on a compact spherical interferometer is described. We demonstrate a sub-Doppler accuracy of ±1 part in 107 by introducing a Vernierlike coincidence concept that takes advantage of the high finesse of the multiple-beam interferometer.
© 1980 Optical Society of America
Original Manuscript: August 31, 1979
Published: February 1, 1980
R. Salimbeni and R. V. Pole, "Compact high-accuracy wavemeter," Opt. Lett. 5, 39-41 (1980)