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Absorption Spectra of Standard Gases for Wavelength Reference in C-band using a Supercontinuum Source Based on a Mode-locked Cr4+:YAG Laser

모드 잠금 Cr4+:YAG 레이저로부터 발생된 초 광대역 광원을 이용한 광통신 파장 영역의 표준 가스의 흡수스펙트럼

  • Lee, Jong-Min (Department of Physics, Chungnam National University) ;
  • Jeon, Min-Yong (Department of Physics, Chungnam National University) ;
  • Ryu, Han-Young (Division of Optical Metrology, Korea Research Institute of Standards and Science) ;
  • Suh, Ho-Suhng (Division of Optical Metrology, Korea Research Institute of Standards and Science)
  • 이종민 (충남대학교 물리학과) ;
  • 전민용 (충남대학교 물리학과) ;
  • 유한영 (한국표준과학연구원 양자응용 SI연구단) ;
  • 서호성 (한국표준과학연구원 양자응용 SI연구단)
  • Published : 2008.02.29

Abstract

We report on the measurements of absorption spectra from acetylene ($^{12}C_2H_2$) and hydrogen cyanide ($H^{13}C^{14}N$) for wavelength reference in the C-band (conventional band) region using a supercontinuum optical source generated from a mode-locked $Cr^{4+}$:YAG laser. The center wavelength of the mode-locked $Cr^{4+}$:YAG laser was 1510 nm and the pulse duration was 75 fs at 100 MHz repetition rate. The supercontinuum source achieved a flatness of ${\pm}5dB$ over a wavelength range of more than 400 nm, using a 20 m long photonic crystal fiber. The measured absorption spectra from acetylene ($^{12}C_2H_2$) and hydrogen cyanide ($H^{13}C^{14}N$) had more than 50 lines and were analyzed for wavelength standardization.

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