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Authors: G. Morthier, P. Mechet
Title: Theoretical analysis of unidirectional operation and reflection sensitivity of semiconductor ring or disk lasers
Format: International Journal
Publication date: 10/2013
Journal/Conference/Book: IEEE Journ. Quant. El.
Editor/Publisher: IEEE, 
Volume(Issue): 49(12) p.1097-1101
DOI: 10.1109/jqe.2013.2288494
Citations: 19 ( - last update: 12/5/2024)
15 (OpenCitations - last update: 19/4/2024)
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We theoretically and numerically analyse the unidirectional behaviour of ring or disk lasers coupled to bus waveguide with a relatively strong reflector on one side, and find analytical expressions for the ratio of the powers in clockwise and counter clockwise modes. At low bias levels this ratio depends on the coupling coefficients that determine the coupling between clockwise and counterclockwise modes, while at high bias levels it also depends strongly on the gain suppression. We also theoretically and numerically invest the feedback sensitivity of such lasers and come to the conclusion that ring or disk lasers are generally much more sensitive to external reflections than traditional Fabry-Perot, DFB or DBR lasers. At high bias levels, the feedback sensitivity also depends strongly on the gain suppression and at high enough power levels it can be better than that of traditional edge-emitting lasers.

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