Journal of the Optical Society of Korea

  • 제1권2호
  • /
  • Pages.110-115
  • /
  • 1997
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Cascaded Raman fiber amplifier operating at 1.3.mu.m using WDM couplers

  • Chang, Do-Il (Department of Physics, Korea advanced Insitute of Science and Technology) ;
  • Kong, Hong-Jin (Department of Physics, Korea advanced Insitute of Science and Technology) ;
  • Chernikov, S.V. (Femtosecond Optics Group, Imperial College, UK) ;
  • Guy, M.-J. (Femtosecond Optics Group, Imperial College, UK) ;
  • Taylor, J. R. (Femtosecond Optics Group, Imperial College, UK)
  • 투고 : 1997.07.07
  • 발행 : 1997.09.01
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초록

We report effcient cascaded Raman generation and signal amplification at 1.3.mu.m achieved in a ring resonator constructed solely from fiber components, i.e. fusion WDM couplers. Low-loss single-mode fiber with moderate $GeO_2$ content (18 mole %) is used as an active medium and pumped by a Nd:YAG laser at 1.064.mu.m. In a resonant cascaded geometry, this generates the third Stokes line at 1.24.mu.m, which acts as a pump for signal wavelength around 1.3.mu.m. A DFB laser operating at 1.315.mu.m is used to provide an input signal. An output signal powers up to 20 dBm (100 mW) with a 28 dB Raman gain are attained, where the Nd:YAG pump power is 3.4 W. It is also shown experimentally that it is important to use optical filters to suppress feedback from the resonator, permitting high Raman gain and good signal quality.

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