Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Effect of Amplified Spontaneous Emission on the Gain Recovery of a Semiconductor Optical Amplifier

  • Lee, Hojoon (Department of Information Communication Engineering, Hoseo University)
  • Received : 2017.12.07
  • Accepted : 2018.01.25
  • Published : 2018.02.25
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Abstract

The impact of the amplified spontaneous emission (ASE) on the gain recovery time of a bulk semiconductor optical amplifier (SOA) is investigated. The gain-recovery time is obtained by determining the time evolution of the gain, carrier density, and ASE in an SOA, after the propagation of a short pump pulse and continuous-wave (CW) probe of gain dynamics. In the simulation, a wide-band-semiconductor model, which can be characterized by the material gain coefficient over a wide wavelength range, is used, because the gain bandwidth of a practical SOA is very wide. The pump pulse and counterpropagating CW probe field are considered in the simulation, with the ASE noise spectrum equally divided.

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References

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