R. Bocquet et al., NEW POSSIBILITIES FOR FREQUENCY STABILIZATION OF FAR-INFRARED LASERS, International journal of infrared and millimeter waves, 17(7), 1996, pp. 1181-1192
All spectrometers based on the use of a far infrared laser present the
drawback of the laser frequency uncertainty. Even if the knowledge of
the laser frequency is very precise, a shift of the laser cavity leng
th is always present, limiting the spectrometer frequency accuracy to
500 kHz. The goal of this paper is to give a solution to this drawback
in demonstrating the feasibility of a frequency stabilization of the
far infrared laser.