Abstract

A four-section CO₂ laser is described which can produce 20 W in fundamental mode during a 1-sec pulse with a frequency tuning range of ±300 MHz. It operates at 200-Torr pressure using sonic axial flow to inhibit the discharge column from filamenting. The input power density is 58 W cm⁻³ corresponding to an efficiency of 2%.

© 1984 Optical Society of America

Investigation of cw optically pumped 12-μm NH₃ lasers using a tunable diode laser

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