Twin optically-pumped far-infrared CH/sub 3/OH laser for plasma diagnostics

Journal Article · Sat Mar 01 00:00:00 EST 1980 · Int. J. Infrared Millim. Waves; (United States)

DOI:https://doi.org/10.1007/BF01007066· OSTI ID:5636488

Yamanaka, M ^[1]; Takeda, Y ^[2]; Tanigawa, S ^[3]; Nishizawa, A ^[4]

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1. Osaka University, Suita, Japan
2. Nagoya University, Nagoya, Japan
3. Kansai University, Suita, Osaka, Japan
4. Tokyo, Science University, Tokyo, Japan

A twin optically-pumped far-infrared CH/sub 3/OH laser has been constructed for use in plasma diagnostics. The antisymmetric doublet due to the Raman-type resonant two-photon transition is reproducibly observed at 118.8 microns. With the 118.8-micron line, it is found that CH/sub 3/OH absorption line center is 16 + or - 1 MHz higher than the pump 9.7-micron P(36) CO/sub 2/ laser line center. It is shown that the Raman-type resonant two-photon transition is useful in order to get several MHz phase modulation for the far-infrared laser interferometer. Some preliminary performances of this twin laser for the modulated interferometer are described.

• OSTI ID: 5636488
• Journal Information: Int. J. Infrared Millim. Waves; (United States), Vol. 1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHEMICAL LASERS
FAR INFRARED RADIATION
PLASMA DIAGNOSTICS
ABSORPTION
ABSORPTION SPECTRA
INTERFEROMETERS
LASER RADIATION
METHANOL
OPTICAL PUMPING
PHASE SHIFT
ALCOHOLS
ELECTROMAGNETIC RADIATION
HYDROXY COMPOUNDS
INFRARED RADIATION
LASERS
MEASURING INSTRUMENTS
ORGANIC COMPOUNDS
PUMPING
RADIATIONS
SPECTRA
420300* - Engineering- Lasers- (-1989)
700102 - Fusion Energy- Plasma Research- Diagnostics