Author(s)

D. B. Kolker, I. V. Sherstov, A. I. Karapuzikov, A. A. Karapuzikov, A. A. Boyko, M. K.Starikova, N. Yu. Dukhovnikova, V. N. Loconov, M. Yu. Shtyrov, I. B. Miroshnichenko, K. G. Zenov, M. B. Miroshnichenko

1Novosibirsk State Technical University 2Special Technology LTD.
1Novosibirsk State Technical University 2Special Technology LTD 3OKTAVA LTD.
OKTAVA LTD.
Special Technology LTD.

The gas analyzer based on optical parametric oscillators (OPO) and laser photo - acoustic spectroscopy is demonstrated. The optical parametric oscillators based on fun – out PPLN and bulk crystal AgGaS₂ with a two-pass pumping are developed. Wide tunable OPO is pumped by compact nanosecond Nd: YLF laser. Pulse duration is 5 - 7 ns, maximum pulse energy is 1.5 mJ at a frequency of 100-2000 Hz. OPO lasing threshold is 10 - 16 mJ/cm² at the spectral range 2.2 - 4 μm for fun – out PPLN OPO and 12 - 20 mJ/cm² at the spectral range 4 - 7.5 μm for AgGaS₂ OPO. Absorption spectra of gaseous mixtures (CH₄, C₃H₈, C₂H₆, C₂H₄ and CO₂) and human’s breath were studied.

Optical Parametric Oscillator; Nonlinear Optical Crystals; Silver Thiogallate; Fun – out PPLN; Photo - Acoustic Spectroscopy; Absorption Spectrum

D. B. Kolker, I. V. Sherstov, A. I. Karapuzikov, A. A. Karapuzikov, A. A. Boyko, M. K.Starikova, N. Yu. Dukhovnikova, V. N. Loconov, M. Yu. Shtyrov, I. B. Miroshnichenko, K. G. Zenov and M. B. Miroshnichenko, "PAD Spectrometer Based on Wide Tunable Optical Parametric Oscillator for Noninvasive Medical Diagnostics," Optics and Photonics Journal, Vol. 3 No. 2B, 2013, pp. 43-46. doi: 10.4236/opj.2013.32B010.