This research was supported by the Advanced Research Projects Agency through Army Research Office, and by the Air Force Office of Scientific Research.
Lasers -- Resonators, Lasers -- Calibration
The transverse modes of a laser resonator containing a medium with a strong radial gain profile differ greatly from the modes of a similar resonator containing a low gain medium. Focusing and defocusing effects result from the gain profile and from the associated dispersion profile. The dispersion focusing causes an asymmetry in the power output as the laser is tuned across the gain line. The theory has been verified using a high gain 3.51-µ xenon laser.
Lee W. Casperson, Amnon Yariv. Gain and Dispersion Focusing in a High Gain Laser. Applied Optics, Volume 11, Number 2 (February 1972), pp. 462-466.