Spatial variation of gain and saturation in a fast axial flow CO sub 2 laser amplifier

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.28.003725· OSTI ID:5522924

Takahashi, N ^[1]; Tsuchida, E; Sato, H ^[2]

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1. National Defense Academy, Department of Applied Physics, Tokosuka 239, Japan (JP)
2. National Defense Academy, Department of Electrical Engineering, Tokosuka 239, Japan

The spatial variation of gain and saturation is analyzed in weakly and heavily saturated cases for a fast axial flow (FAF) CO{sub 2} laser amplifier with laser gas in laminar and turbulent flow regions. Expressiong the laser parameters by fourth-order even functions of the radial distance, the development of the amplified radiation is predicted and compared successfully to the experimental results for the 10{ital P}(18) line. The distinctive feature of a FAF system is enhancement of the gain and saturation irradiance as well as the mode volume. The condition of spatial soliton is also discussed in a heavily saturated case.

• OSTI ID: 5522924
• Journal Information: Applied Optics; (USA), Journal Name: Applied Optics; (USA) Vol. 28:17; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
CARBON DIOXIDE LASERS
DISTRIBUTION
FLUID FLOW
GAIN
GAS FLOW
GAS LASERS
LAMINAR FLOW
LASERS
OPERATION
SATURATION
SPATIAL DISTRIBUTION
TURBULENT FLOW