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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 21,
  • Issue 1,
  • pp. 170-
  • (2003)

Fabrication and Characteristics of GaP-AlGaP Tapered Waveguide Semiconductor Raman Amplifiers

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Abstract

We have fabricated GaP-AlGaP tapered waveguide semiconductor Raman amplifiers, and analyzed the effect of tapering in pulse-pumped high-gain operation. The finesse measurement and 80-ps pulse pumped Raman amplification experiment were performed. Although the tapering has caused additional optical loss, the highest gain of 23 dB has been obtained for a tapered waveguide with input facet of 6.0 µm2 and back facet of 2.9 µm2 at averaged input power of 170 mW (peak power 26 W). It is shown that the optical loss of the pump light is more severe than the linear optical loss of the signal light when the gain is higher than 20 dB.

[IEEE ]

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