Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Equi-spaced multichannel stabilization with a reference frequency from ($^13C_2H_2$) molecules and optical fiber fabry-perot filter

아세칠렌가스($^13C_2H_2$)분자의 흡수선을 이용한 기준 광신호 및 광섬유 파브리-페로 필터에 의한 등간격 다중채널의 안정화

  • 이현재 (한국전자통신연구소 광대역전송연구부) ;
  • 류갑열 (한국전자통신연구소 광대역전송연구부) ;
  • 이동호 (한국전자통신연구소 광대역전송연구부) ;
  • 박창수 (한국전자통신연구소 광대역전송연구부)
  • Published : 1997.02.01
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Abstract

Using one of the absorption lines of $^{13}C_2H_2$ molecules near the zero dispersion wavelength(1549.49nm) of dispersion shifted fiber, we stabilized center frequency of an optical fiber Fabry-Perot filter. The free spectral range of the filter is 100 GHz for 100 GHz channel allocation. For equi-spaced three channel multiplexing, channel locking of three DFB-LDs to transmission peaks of the fiber Fabry-Perot filter was tried. To investigate the effect of dithering current applied to each DFB-LD, the change of DFB-LD linewidth was measured.

$^{13}$C$_{2}$H$_{2}$ 분자의 빛살 흡수선 중 분산천이 광섬유의 영분산 파장에 가까운 1549.49 nm 파장의 흡수선에 DFB-LD (distributed feedback laser diode)의 주파수를 안정화시켰다. 이 주파수 안정화된 DFB-LD와 광섬유 파브리-페로 필터의 투과 및 반사특성을 이용하여 광섬유 파브리-페로 필터의 중심주파수를 안정화시켰다. 자유분광너비(free spectral range)가 100 GHz인 안정화된 광섬유 파브리-페로 필터의 공진 조건에 파장이 다른 3개의 DFB-LD 빛살을 투과시켜 DFB-LD들을 안정화시킴으로써 주파수분할 다중을 하였다. 또한 레이저를 디더링(dithering) 방법으로 안정화시켰을 때 디더링 전류에 따른 레이저의 선폭변화는 600 MHz/mA였다.

Keywords

References

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