J. Bendtsen, LONG-TERM FREQUENCY-STABILIZED AR-ION LASER SYSTEM FOR HIGH-RESOLUTION RAMAN-SPECTROSCOPY OF GASES, Applied optics, 34(18), 1995, pp. 3377-3379
An Ar-ion laser with a measured single-mode linewidth of 5 MHz at 488
nm has been stabilized to approximately 1 MHz. The stabilization has b
een obtained by means of a Fabry-Perot interferometer as wavelength re
ference and a solid etalon as mode selector. The error signal is gener
ated by modulation of the length of the laser cavity. The stabilizatio
n system is able to keep the wavelength fixed for periods of more than
100 h.