Angular and spectral characteristics of a parametric converter of thermal radiation based on a lithium iodate crystal

V. V. Lebedev, G. M. Barykinskiĭ


Abstract: The angles of noncntical phase matching and the spectral reception band were calculated and measured for a parametric infrared radiation (1–6 μ) converter based on a lithium iodate crystal. The signal was in the form of Globar radiation and the pump radiation was provided by a ruby or neodymium-glass laser. The maximum width of the reception band in the 4.2 μ range was 470 ± 50 cm^–1 when the conditions of noncntical phase matching and dispersion matching were satisfied simultaneously. Conversion of images of thermal objects emitting in the 1–3 μ range was possible with a resolution of 5 lines/mm.

UDC: 621.378.33

PACS: 42.80.Qy

Received: 12.08.1977

 English version: Soviet Journal of Quantum Electronics, 1978, 8:10, 1227–1229