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has been cited by the following article:

• TITLE: PAD Spectrometer Based on Wide Tunable Optical Parametric Oscillator for Noninvasive Medical Diagnostics

  AUTHORS: 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

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

  JOURNAL NAME: Optics and Photonics Journal, Vol.3 No.2B, July 18, 2013

  ABSTRACT: 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.