Title :
Inter-transverse-mode injection locking and subthreshold gain measurements in a CO2 waveguide laser
Author :
Pearson, G.N. ; Harris, M. ; Hill, C.A. ; Vaughan, J.M. ; Hornby, A.M.
Author_Institution :
Defence Res. Agency, Great Malvern, UK
fDate :
6/1/1995 12:00:00 AM
Abstract :
A higher order CO2 waveguide laser resonator mode has been studied both above and below threshold, by reinjecting a frequency shifted portion of the laser output back into the resonator. The relative reinjected (autodyne) gain profile in the vicinity of the subthreshold transverse mode is shown to shift in frequency, reduce in spectral width, and increase in magnitude as the subthreshold mode is brought nearer to threshold by tilting one of the resonator mirrors. Once above threshold, inter-transverse-mode injection locking has been demonstrated, and close to the locking-point higher order terms from the nonlinear interaction are clearly evident
Keywords :
carbon compounds; gain measurement; gas lasers; laser accessories; laser cavity resonators; laser mirrors; laser mode locking; laser modes; laser variables measurement; mirrors; spectral line breadth; waveguide lasers; CO2; CO2 waveguide laser; above threshold; below threshold; frequency shifted; inter-transverse-mode injection locking; laser output; laser resonator mode; nonlinear interaction; reinjected autodyne gain profile; resonator mirrors; spectral width; subthreshold gain measurements; subthreshold mode; subthreshold transverse mode; Frequency; Gain measurement; Injection-locked oscillators; Laser mode locking; Laser modes; Laser radar; Mirrors; Optical resonators; Optical waveguides; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
