Intracavity gain detection: example I2, Br2.
Optical gains as small as 2 x 10(-5) are detectable by placing the gain medium inside the cavity of a cw dye laser and operating the laser slightly above threshold to take advantage of moderate spatial hole burning. This technique was used to measure gain on the 40' --> 6", 7", and 8" transitions in optically pumped Br2.
Truesdell
K A
KA
University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Keller
R A
RA