Development of a compact light source at 1.67 micrometer for methane leak detection using DIAL

Nilesh J. Vasa, Kouji Saito, Kouji Ikuta, Yuji Oki, Mitsuo Maeda

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

In the present work, a sensing system for methane gas leakage monitoring based on a differential absorption lidar with a high temporal resolution is proposed and a spectrally narrowed light source at 1.67 μm is developed for the same. To realize a compact light source, an injection seeded optical parametric oscillator (OPO) combined with two-stage optical parametric amplifiers (OPAs) is considered. Both OPO and OPAs were pumped by a compact frequency doubled Nd:YAG laser, and a single-mode diode laser (781.6 nm) was employed for injection seeding of the OPO. The output energy of around 5 mJ corresponding to a pump input of 85 mJ was obtained using Ce doped KTP (Ce:KTiOPO4) crystals. The spectral width of the source was measured as 0.5 cm-1 with a beam divergence angle of less than 2 mrad. These output characteristics are satisfactorily meeting the requirements to detect the methane leakage in a short range.

本文言語英語
ページ(範囲)471-479
ページ数9
ジャーナルProceedings of SPIE-The International Society for Optical Engineering
4153
DOI
出版ステータス出版済み - 1 1 2001

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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