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Open AccessArticle

Optical Feedback Sensitivity of a Semiconductor Ring Laser with Tunable Directionality

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Applied Physics research group (APHY), Department of Applied Physics and Photonics, Vrije Universiteit Brussel, 1050 Brussels, Belgium
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Brussels Photonics (B-PHOT), Department of Applied Physics and Photonics, Vrije Universiteit Brussel, 1050 Brussels, Belgium
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Author to whom correspondence should be addressed.
Photonics 2019, 6(4), 112; https://doi.org/10.3390/photonics6040112
Received: 6 September 2019 / Revised: 23 October 2019 / Accepted: 26 October 2019 / Published: 28 October 2019
(This article belongs to the Special Issue Semiconductor Laser Dynamics: Fundamentals and Applications)
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. View Full-Text
Keywords: semiconductor ring laser; optical feedback; laser stability semiconductor ring laser; optical feedback; laser stability
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MDPI and ACS Style

Verschaffelt, G.; Khoder, M.; Van der Sande, G. Optical Feedback Sensitivity of a Semiconductor Ring Laser with Tunable Directionality. Photonics 2019, 6, 112.

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