FAR-INFRARED CONTINUOUS-WAVE LASER OSCILLATION IN PURE HELIUM

1 June 1969

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 14 (11) , 348-350
https://doi.org/10.1063/1.1652681

Abstract

Continuous‐wave laser oscillation has been observed in pure helium at wavelengths of 95.8 and 216.3 μ corresponding to the 3¹P → 3¹D and 4¹P → 4¹D transitions, respectively. Study of the excitation mechanism of the laser levels permits calculation of gain and output power starting from first principles.

Keywords

FAR INFRARED
CONTINUOUS WAVE
OSCILLATIONS
FIRST PRINCIPLE

This publication has 2 references indexed in Scilit:

Direct measurements of the lifetimes of excited states of neutral helium
Proceedings of the Physical Society, 1964
Excitation processes in helium
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1960