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

• 作者: A. A. Boyko A. A. Karapuzikov A. I. Karapuzikov D. B. Kolker I. B. Miroshnichenko I. V. Sherstov K. G. Zenov M. B. Miroshnichenko M. K.Starikova M. Yu. Shtyrov N. Yu. Dukhovnikova V. N. Loconov
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 工学
• 关键词: OPTICAL Parametric OSCILLATOR Nonlinear OPTICAL Crystals Silver Thiogallate Fun – out PPLN Photo - Acoustic Spectroscopy Absorption Spectrum
• 年，卷（期）: 2013,（2）
• 页码范围: 43-46
• 页数: 4页
• 分类号: TN2

摘要

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.