2-PHOTON TRANSITIONS IN OPTICALLY PUMPED SUBMILLIMETER LASERS

被引：51

作者：

WIGGINS, JD

DROZDOWICZ, Z

TEMKIN, RJ

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[2] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1978年 / 14卷 / 01期

关键词：

D O I：

10.1109/JQE.1978.1069673

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The emission frequency of an amplified spontaneous emission (ASE), optically pumped submillimeter (SMM) laser has been studied as a function of laser gas pressure for several different gases and SMM laser lines. For off resonant pumping, Fabry-Perot interferometer scans indicate a shift in emission frequency between high-and low-pressure laser operation. In high-pressure operation, emission occurs via a Raman type, two-photon process with some additional frequency offset due to the ac Stark effect. The Raman process is favored by its higher quantum efficiency over a two-step process involving single-photon transitions at the pump and SMM wavelengths. In low-pressure operation, the SMM laser emission is found to be delayed in time with respect to the pump pulse. The Raman process thus cannot occur and the two-step process is favored. This results in a shift in the SMM laser emission frequency from the Raman line to the line center frequency of the SMM laser transition. The Raman emission gain bandwidth appears to be broadened by the CO2 pump laser bandwidth. © 1978, IEEE. All rights reserved.

引用

页码：23 / 30

页数：8

共 21 条

[1]

Chang T.Y., Bridges T.J., Laser action at 452, 496 and 541 pm in optically pumped CH3F, Opt. Commun., 1, pp. 423-426, (1970)

[2]

Tucker J.R., Theory of a FIR gas laser, Conf. Dig., Int. Conf, pp. 17-18, (1974)

[3]

Temkin R.J., Theory of optically pumped submillimeter lasers, IEEE J. Quantum Electron., QE-13, pp. 450-454, (1977)

[4]

Skribanowitz N., Herman I.P., Osgood R.M., Feld M.S., Javan A., Anisotropic ultrahigh gain emission observed in rotational transitions in optically pumped HF gas, Appl. Phys. Lett., 20, pp. 428-431, (1972)

[5]

Petuchowski S.J., Rosenberger A.T., Detemple T.A., Stimulated Raman emission in infrared exicted gases, 2nd Int. Conf. Winter School on Submillimeter Waves, Conf. Dig., pp. 192-193, (1976)

[6]

Stimulated Raman emission in infrared excited gases, IEEE J. Quantum Electron., QE-13, pp. 476-481, (1977)

[7]

Danielewicz E.J., Malk E.G., Coleman P.D., High-power vibration rotation emission from 14NH3 optically pumped off resonance, Appl. Phys. Lett., 29, pp. 557-559, (1976)

[8]

Chang T.Y., Mcgee J.D., Off-resonant infrared laser action in NH3 and C2H4 without population inversion, Appl. Phys. Lett., 29, pp. 725-727, (1976)

[9]

Temkin R.J., Theory of optically-pumped submillimeter lasers, 2nd Int. Conf. Winter School Submillimeter Waves, Conf. Dig., pp. 43-44, (1976)

[10]

Takami M., Theory of optical-microwave double resonance I. Fundamentals and double resonance of microwave detection, Japan J. Appl. Phys., 15, pp. 1063-1071, (1976)

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