Stabilization of a CO2 laser by means of a two-beam interferometer

Sakai, Kiyomi; Kato, Yoshiaki; Fukushima, Toru; Konishi, Y.; Ichioka, Yoshiki; Suzuki, Norihito

doi:10.1016/0020-0891(89)90015-8

Infrared Physics

1989

DOI: 10.1016/0020-0891(89)90015-8

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Stabilization of a CO2 laser by means of a two-beam interferometer

Kiyomi Sakai¹,

Yoshiaki Kato²,

Toru Fukushima³

et al.

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Cited by 2 publications

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Powerful Optically Pumped Far-Infrared Laser with Stable Output Power

Hori¹,

Izutsu²

2000

Jpn. J. Appl. Phys.

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This paper describes the characteristics of the output stability of a powerful optically pumped far-infrared laser and the related physical phenomena used to measure and to improve the stability characteristics. First, we mention that the frequency stability of the CO 2 pump laser, measured with Doppler-free and pressure-broadened Stark Lamb dip signals, is about 250 kHz drift per hour in the free-running mode and about 150 kHz p-p in the actively stabilized mode. Next, we show that optical resonant feedback disturbed the output stability of our far-infrared laser. Then, we show that the output stability, resonant feedback, and temperature stability are closely related and that stable output can be obtained by controlling the temperature by using high-power chillers and a long idling time. Offset-hole input couplers also reduce the feedback. As a result, FIR output is stabilized to within a few percent.

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Powerful Optically Pumped Far-Infrared Laser with Stable Output Power

Hori¹,

Izutsu²

2000

Jpn. J. Appl. Phys.

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Infrared and far-infrared lasers for plasma diagnostics.

Okajima

1989

The Review of Laser Engineering

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The infrared and far-infrared spectral region is particularly well suited to diagnose the state of magnetically confined fusion plasmas. Interferometers and polarimeters are used to measure electron and current density profiles. Collective scattering techniques are used to probe a variety of turbulent and coherent waves that exist in these plasmas. The density fluctuations associated with these waves may be responsible for the observed anomalous transport in fusion plasmas.The present status of research on the infrared and far-infrared lasers used for these plasma diagnostics is reviewed.

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Stabilization of a CO2 laser by means of a two-beam interferometer

Cited by 2 publications

References 2 publications

Powerful Optically Pumped Far-Infrared Laser with Stable Output Power

Powerful Optically Pumped Far-Infrared Laser with Stable Output Power

Infrared and far-infrared lasers for plasma diagnostics.

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