CO2 LASER LINEWIDTH BY MEASUREMENT OF STEP RESPONSE
- 1 November 1968
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 13 (9) , 316-318
- https://doi.org/10.1063/1.1652629
Abstract
Fast rise pulses from a GaAs electrooptic switch are used to measure the small signal time response to a step of radiation, of a 20 dB, homogeneously broadened CO2, He, N2 laser amplifier. By comparing the observed shape of the time response (rise time ≈ 15 nsec) with theory, the value of T2, the homogeneous relaxation time, and hence the linewidth is obtained as a function of gas pressure. The doppler broadening (59 MHz), pressure broadening (4.67 MHz/Torr) and gas temperature (372°K) are obtained.Keywords
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