Laser applications and other topics in quantum electronics

Photoinduced and nonlinear absorption in chalcogenide glasses and α–Si:H films

V. V. Ponomar'

Institute of Applied Physics Academy of Sciences of Moldova, Kishinev

Abstract: This paper compares data on photoinduced and nonlinear optical absorption in fibers made of chalcogenide glasses and in thin films of α–Si:H. The experimentally observed variation of the spectral characteristics and absorption coefficient with the length of the chalcogenide glass fibers and the thickness of the α–Si:H films is explained by calculations based on the assumption that the absorption of low-intensity (measurement-level) light is nonlinear. The possibility of practical use of this phenomena is demonstrated.

UDC: 621.373.526

PACS: 78.40.Fy, 78.30.Ly, 78.30.Am, 78.20.Ci, 78.66.Jg, 78.40.Pg

Received: 11.09.1992
Revised: 07.04.1993

 English version: Quantum Electronics, 1993, 23:7, 613–616

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