Abstract

The frequency of the 170.6-μm cw CH₃OH optically pumped laser emission has been remeasured at different pressures without observing the pressure shift observed by Lawandy and Koepf [Opt. Lett. 5, 383 (1980)]. The far-infrared frequency was synthesized with two stabilized CO₂ lasers. No measurable pressure shift over the operating pressure range of the laser was observed, and the frequency was confirmed to be 1 757 526.3 MHz. However, competing lasing lines were found to produce spurious effects on the frequency. These effects may explain the apparent shifts.

© 1984 Optical Society of America

Efficient far-infared laser lines from CH₂F₂ pumped by a continuous-wave waveguide CO₂ laser

G. Merkle and J. Heppner
Opt. Lett. 9(12) 542-543 (1984)

Far-infrared laser lines in vinyl fluoride optically pumped by a CO₂ laser near 10 μm

M. Redon, C. Gastaud, and M. Fourrier
Opt. Lett. 9(3) 71-72 (1984)

Stark effects in optically pumped CH₃OH far infrared laser

K. P. Koo and P. C. Claspy
Appl. Opt. 18(9) 1314-1321 (1979)

Continuous-wave Stark far-infrared lasing lines in ¹⁵NH₃ optically pumped by a CO₂ or N₂O laser

C. Gastaud, A. Sentz, M. Redon, and M. Fourrier
Opt. Lett. 6(9) 449-451 (1981)

Far-infrared continuous-wave laser emission from H₂O and from NH₃ optically pumped by a CO laser

M. Schneider, K. M. Evenson, and J. W. C. Johns
Opt. Lett. 21(14) 1038-1039 (1996)