Tunable
infrared generation in KTA and applications
G C BHAR , P KUMBHAKAR, A K CHAUDHARY and U
CHATTERJEE
Laser Laboratory, Physics
Department, Burdwan University, Burdwan 713 104,
India Central Forensic Science Laboratory, 30-Gorachand
Road, Calcutta 700 014, India
Email:bdnuvlib@giascl01.vsnl.net.in
MS received 12 April
1999
Abstract:
Noncollinear difference
frequency mixing of dye laser and Nd:YAG second
harmonic (fundamental) radiation from a commercial
laser system is employed for the generation of
2.7-5.3 m m (1.6-1.7 m m) radiations in a flux-grown KTiOAsO4
crystal. The generated radiation is used to scan the
methane absorption in the fundamental (n 3
) and its first overtone (2n 3 ) band at pressure 90 torr
in a laboratory made single pass gas cell of length
33 cm.
Keywords. Nonlinear
optics; frequency conversion; methane absorption.
PACS Nos 42.65.K; 86.70.L
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