title: Simultaneous observation of CO isotopomer absorption by broadband difference-frequency generation using a direct-bonded quasi-phase-matched LiNbO3 waveguide.
abstract: Rovibration absorption lines both of 12CO and 13CO are observed simultaneously with the output of a 2 microm broadband difference frequency generated in a direct-bonded quasi-phase-matched LiNbO3 waveguide, which is a 50 mm device with a single quasi-phase-matching period that is operated at a constant temperature. The wavelength conversion efficiency and the difference-frequency generation bandwidth reach 100%/W and 100 nm, respectively. The idler output bandwidth in the 2 microm region is obtained by group-velocity matching or phase-mismatch minimization when a 0.94 microm pump laser diode and a 1.55 microm tunable signal source are used.
authors.affiliation: NTT Photonics Laboratories, NTT Corporation, 3-1, Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan. yanagawa@aecl.ntt.co.jp
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Yanagawa
authors.forename: Osamu
authors.initials: O
authors.lastname: Tadanaga
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Nishida
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Miyazawa
authors.forename: Katsuaki
authors.initials: K
authors.lastname: Magari
authors.forename: Masaki
authors.initials: M
authors.lastname: Asobe
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Suzuki