No abstract

No abstract

Abstroct-Varioua forma of cot lasers have achievbd CW powersin the 6CbkW range, operating efficiencies approaching 30 percent, pulse energies of approximately ZOO0 J, pulsewidths less than 1 ns, peak pulse powers in excess of 10' W, a frequency stability of a few parts in lo", and sealed-off tube lifetimes of many thousands of hours. In addition, the laser CBIL be easily @switched as well as gainswitched and has been electrically, optically, gas-dynamically, and chemically pumped. In addition to all these attributes, the Cot laser output wavelength lies within one of the best atmospheric windows. It should be no surprise then that during the last eight years, the COz laser has finnly established itself as a candidate for recognition as the most important among the numerous laser devices presently known. Depending on the gas pressure, gas flow rate, pumping mechanisms, gas mixtrue, etc., COZ lasers.-exhibit a wide range of noise, bandwidth, gain, and power saturation characteristics. This flexibility enables a designer to optimize the performance of Cot laser stable-frequency master oscillators; power oscillators; lownoise high-gain preamplifiers; intermediate-power or high-power amplifiers. As a result, COZ laser oscillator-amplifier chains can be designed utilizing guidelines similar to those which have been extensively applied in the design of transmitters in the RF and micm wave region of the electromagnetic spectrum.

in which primes denote derivatives with respect to the atomic fraction, c, of the second component, t is the time, f the Helmholtz free energy per unit volume, K the gradient-energy coefficient,4 TJ the linear expansion per unit change in atomic fraction, Ya

Articles you may be interested inMode locking of excimer laser pumped dye lasers Appl. Phys. Lett. 45, 929 (1984); 10.1063/1.95464 Double mode locking of dye lasers