Amplifying optical signals with discrete solitons in waveguide arrays

Amaria Javed, Alaa Shaheen, U. Al Khawaja

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We present a design and protocol to achieve an essential feature of an optical transistor, namely the amplification of input signal with the use of discrete solitons in waveguide arrays. We consider the scattering of a discrete soliton by a reflectionless potential in the presence of a control soliton. We show that at the sharp transition region between full reflectance and full transmittance, the intensity of the reflected or transmitted soliton is highly sensitive to the intensity of the control soliton. This suggests a setup of signal amplifier. For realistic purposes, we modulate the parameters of the reflectionless potential well to achieve a performance of amplifier with a controllable amplification. To facilitate the experimental realization, we calculate the amplification factor in terms of the parameters of the potential well and the input power of the control soliton. The suggested signal amplifier device will be an important component in the all-optical data processing.

Original languageEnglish
Article number126654
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number26
Publication statusPublished - Sept 18 2020


  • All-optical data processing
  • Discrete solitons
  • Optical amplifier
  • Waveguide arrays

ASJC Scopus subject areas

  • General Physics and Astronomy


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