Title :
Effect of excited-state absorption at signal wavelength in pulsed-dye-laser amplifiers
Author :
Dasgupta, K. ; Nair, L.G.
Author_Institution :
Bhabha Atomic Res. Center, Bombay, India
fDate :
1/1/1990 12:00:00 AM
Abstract :
The effect of excited-state absorption (ESA) at the laser wavelength in transversely pumped pulsed-dye-laser amplifiers is theoretically examined. Assuming steady-state conditions, it is shown that ESA along with ground-state absorption introduces a nonlinear loss term in the amplifier equation. An improved expression for the saturated gain is obtained, and it is shown that the amplifier extraction efficiency does not saturate with increase in dye-laser input power, but shows a maximum and then decreases. These theoretical results are compared with experimental measurements on copper-vapor laser-pumped dye-laser amplifiers
Keywords :
dye lasers; optical losses; optical pumping; optical saturable absorption; Cu; amplifier equation; amplifier extraction efficiency; copper-vapor laser-pumped dye-laser amplifiers; dye-laser input power; excited-state absorption; ground-state absorption; laser wavelength; nonlinear loss term; optical saturable absorption; pulsed-dye-laser amplifiers; saturated gain; signal wavelength; steady-state conditions; transversely pumped pulsed-dye-laser; Absorption; Laser excitation; Laser modes; Laser theory; Laser tuning; Optical amplifiers; Optical pulses; Pulse amplifiers; Pump lasers; Steady-state;
Journal_Title :
Quantum Electronics, IEEE Journal of
