Title :
Sensitive gas detectors by nonlinear mixing in periodically-poled crystals of the KTiOPO4 family
Author :
Fradkin-Kashi, K. ; Arie, A. ; Urenski, P. ; Skliar, A. ; Rosenman, G.
Author_Institution :
Dept. of Electr. Eng., Tel Aviv Univ., Israel
Abstract :
Tunable mid-infrared radiation (3.1-3.75 μm) with a power level of up to 0.17 μW is generated by quasi-phase-matched difference frequency mixing of a Nd:YAG laser and a tunable diode laser (near 1.5 μm) in multi-grating periodically-poled crystals of the KTiOPO4 family. The measurements are used to explore the optical and nonlinear properties of these materials in the mid-infrared, e.g. temperature tuning coefficient, wavelength and temperature bandwidths and a mid-infrared-corrected dispersion equation for nz. The generated mid-infrared radiation is applied to sensitive high-resolution spectroscopy of the ν3-band of methane
Keywords :
air pollution measurement; gas sensors; infrared spectrometers; multiwave mixing; optical tuning; potassium compounds; semiconductor lasers; solid lasers; titanium compounds; ν3-band; 1.5 mum; 3.1 to 3.75 mum; KTP; KTiOPO4; KTiOPO4 family; Nd:YAG laser; YAG:Nd; YAl5O12:Nd; high-resolution spectroscopy; methane; mid-infrared-corrected dispersion equation; multi-grating periodically-poled crystals; nonlinear mixing; nonlinear properties; optical properties; periodically-poled crystals; quasi-phase-matched difference frequency mixing; sensitive gas detectors; temperature bandwidths; temperature tuning coefficient; tunable diode laser; wavelength and temperature bandwidth; Crystals; Diode lasers; Frequency; Gas detectors; Gas lasers; Laser tuning; Power generation; Power lasers; Temperature sensors; Tunable circuits and devices;
Conference_Titel :
Electrical and electronic engineers in israel, 2000. the 21st ieee convention of the
Conference_Location :
Tel-Aviv
Print_ISBN :
0-7803-5842-2
DOI :
10.1109/EEEI.2000.924329
