Title :
Dependence of transient gain on gas-flow velocity and discharge current in the FAF CO2 laser amplifier
Author :
Sato, Heihachi ; Tsuchida, Eiichi
Author_Institution :
Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
Transient behaviors in which the output power amplified through the fast-axial-flow (FAF) CO2 laser amplifier decreases temporally after initiating the discharge are discussed. The output power becomes stable within a few minutes, i.e. the transient time. These phenomena should strongly depend on input irradiance, plasma length, gas-flow velocity v, and discharge current I dis. The small signal gain γ0 is formulated as a function of v and Idis and the discharge time for a partially-homogeneously-broadened, slightly saturated gain medium at individual vibrational-rotational transitions
Keywords :
carbon compounds; gas lasers; optical saturation; CO2 laser; FAF CO2 laser amplifier; discharge current; discharge time; fast-axial-flow; gas-flow velocity; input irradiance; laser discharge initiation; output power; output power stabilisation; partially-homogeneously-broadened; plasma length; slightly saturated gain medium; small signal gain; temporal decrease; transient gain; transient time; vibrational-rotational transitions; Electron tubes; Gas lasers; Laser modes; Laser theory; Mass spectroscopy; Plasma stability; Plasma temperature; Power amplifiers; Power generation; Power lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
