Digitally tunable dual wavelength emission from semiconductor ring lasers with filtered optical feedback

Mulham Khoder, Guy Verschaffelt, Romain Modest Nguimdo, X.j.m Leijtens, Jeroen Bolk, Jan Danckaert

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We report on a novel integrated approach to obtain dual wavelength emission from a semiconductor laser based on on-chip filtered optical feedback. Using this approach, we show experiments and numerical simulations of dual wavelength emission of a semiconductor ring laser. The filtered optical feedback is realized on-chip by employing two arrayed waveguide gratings to split/recombine light into different wavelength channels. Semiconductor optical amplifiers are placed in the feedback loop in order to control the feedback strength of each wavelength channel independently. By tuning the current injected into each of the amplifiers, we can effectively cancel the gain difference between the wavelength channels due to fabrication and material dichroism, thus resulting in stable dual wavelength emission. We also explore the accuracy needed in the operational parameters to maintain this dual wavelength emission.
Original languageEnglish
Article number075804
Number of pages7
JournalLaser Physics Letters
Volume10
Publication statusPublished - 23 Jun 2013

Keywords

  • SRL
  • photonics

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