Pulsed multiline co2 laser oscillator apparatus and method

Details Pulsed multiline co2 laser oscillator apparatus and method Pulsed multiline co2 laser oscillator apparatus and method

H - Electricity

01

S

345/39

H01S 3/10 (2006.01) H01S 3/08 (2006.01) H01S 3/098 (2006.01) H01S 3/22 (2006.01)

Patent

CA 1038070

PULSED MULTILANE CO2 LASER OSCILLATOR APPARATUS AND METHOD Abstract of the Disclosure An apparatus and method for producing a multiline output from a CO2 laser comprising an optical resonant cavity containing gaseous CO2, means for producing a controlled electrical glow discharge within the gas, such as Rogowski profile electrodes connected to a high voltage source, preferably mode locking means such as an acoustooptic modulator, and means within the cavity for producing a wavelength dependent loss, such as a Fabry-Perot etalon filter. The apparatus and method disclosed in the specification greatly increase the efficiency of energy extraction from large CO2 laser amplifiers such as those contemplated for use in inducing nuclear fusion. The means for producing wavelength dependent loss within the laser oscillator cavity lowers the net gain of the usually dominant P(20) transition enough to allow the P(16), P(18), P(22), and P(24) transitions to successfully compete for available upper state population. In prior art pulsed laser oscillators, only the P(20) transition reached laser threshold because of its anomalously high gain coefficient at the expense of the remainder of the nearby rotational transitions. Thus in prior art lasers, the P(20) line dominated the output in all gain switched and mode locked Transverse Excited Atmospheric (TEA) laser oscillators, including electron beam controlled devices.

198511

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