Title :
Compact and tunable mid-infrared laser using QPM-LN waveguide and TLA
Author :
Song, H.B. ; Yanagawa, T. ; Tadanaga, O. ; Magari, K. ; Asobe, M. ; Ishii, Hiroyuki ; Oohashi, Hiromi
Author_Institution :
Photonic Labs., NTT Corp., Atsugi, Japan
Abstract :
A compact and tunable difference frequency generation mid-infrared laser for gas sensing is developed using a quasi-phase-matched LiNbO3 (QPM-LN) waveguide and a tunable laser diode array (TLA). The absorption spectra of methane from the -third- to -fifth-order around 3.3 mum are observed by tuning the QPM-LN waveguide temperature and the TLA wavelength. The absorption line width is investigated with high spectral resolution scanning and the result is compared with that calculated from the HITRAN database.
Keywords :
gas sensors; laser tuning; lithium compounds; measurement by laser beam; optical waveguides; organic compounds; semiconductor laser arrays; spectral line breadth; LiNbO3; QPM-LN waveguide temperature; TLA wavelength; absorption line width; absorption spectra; compact midinfrared laser; difference frequency generation mid-infrared laser; gas sensing; methane; quasiphase-matched waveguide; tunable laser diode array; tunable midinfrared laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1720
