title: Saturated absorption spectroscopy of acetylene molecules with an optical nanofiber.
abstract: We performed saturated absorption spectroscopy of acetylene (C₂H₂) ν₁ + ν₃ band transitions with an optical nanofiber (ONF). Owing to high-intensity light around the ONF, we observed a Lamb dip at relatively low-power laser (~10 mW) without a cavity. Our results showed that the simple ONF spectrometer is advantageous for performing saturation absorption spectroscopy and serves as a practical low-cost wavelength reference in the optical fiber communication band.
authors.affiliation: Institute of Physics, University of Tokyo, 3-8-1, Meguro-ku, Komaba, Tokyo, 153-8902, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Takiguchi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yoshikawa
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Nakayama
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kuga