We discuss the sensitivity to optical feedback of a semiconductor ring laser that is made to emit in a single-longitudinal mode by applying on-chip filtered optical feedback in one of the directional modes. The device is fabricated on a generic photonics integration platform using standard components. By varying the filtered feedback strength, we can tune the wavelength and directionality of the laser. Beside this, filtered optical feedback results in a limited reduction of the sensitivity for optical feedback from an off-chip optical reflection when the laser is operating in the unidirectional regime.
Original languageEnglish
Article number112
Pages (from-to)1-11
Number of pages11
Issue number4
Publication statusPublished - Dec 2019

    Research areas

  • 10.3390/photonics6040112

ID: 49277257