Very short far-infrared pulses from optically pumped CH3OH/D, CH3F, and HCOOH lasers using an EQ-switched CO2laser as a pump source

Author

Bluyssen, H.J.A. ; Van Etteger, A.F. ; Maan, J.C. ; Wyder, P.

Author_Institution

University of Nijmegen, Nijmegen, The Netherlands

Volume

16

Issue

12

fYear

1980

fDate

12/1/1980 12:00:00 AM

Firstpage

1347

Lastpage

1351

Abstract

Very short far-infrared (FIR) pulses were generated from optically pumped CH3F, CH3OH/D, and HCOOH lasers using a $Q$ - switched, current pulsed (200 mA, 100 μs), low pressure (20 torr) CO2laser as a pump source. Values of 20 ns for the rise time and 50 ns for the decay time of the FIR pulses have been observed. The dependence of the FIR pulse shape parameters, i.e., rise time, decay time, and pulse buildup time, on the width of the pump pulse and the pressure of the molecular gas have been investigated experimentally. Due to the regular pulse shape, high repetition rate (350 Hz), high peak power (≳1 W), and broad spectral range ( $\\lambda = 100-500 \\mu$ m), the pulses are very useful for purposes of solid-state and molecular time resolved spectroscopy.

Keywords

Carbon dioxide lasers; Gas lasers; Pulsed lasers; Q-switched lasers; Submillimeter-wave lasers; Finite impulse response filter; Laser excitation; Optical pulse generation; Optical pulse shaping; Optical pulses; Optical pumping; Pulse shaping methods; Pump lasers; Shape; Space vector pulse width modulation;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.1980.1070420

Filename

1070420