Rate-equation theory of a feedback insensitive unidirectional semiconductor ring laser

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For our recently designed continuous-wave and single-frequency ring laser with intra-cavity isolator, we have formulated a rate-equation theory which accounts for two sources of mutual back-scattering between the clockwise and counterclockwise modes, i.e. induced by side-wall irregularities and due to inversion-grating-induced spatial hole burning. With this theory we first confirm that for a ring laser without intra-cavity isolation, from sufficiently large pumping strength on, the inversion-grating-induced bistable operation (i.e. either clockwise or counterclockwise) will overrule the back-reflection-induced coupled-mode operation (i.e. both clockwise and counterclockwise). We then analyze the robustness of unidirectional operation in case of intra-cavity isolation against the intra-cavity back-reflection mechanism and grating-induced mode coupling and derive for this case an explicit expression for the directionality in the presence of external optical feedback, valid for sufficiently strong isolation. The predictions posed in the second reference remain unaltered in the presence of the mode coupling mechanisms here considered.

Originele taal-2Engels
Pagina's (van-tot)13361-13369
Aantal pagina's9
TijdschriftOptics Express
Volume26
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 14 mei 2018

Vingerafdruk

ring lasers
semiconductor lasers
coupled modes
isolation
cavities
gratings
inversions
isolators
hole burning
irregularities
continuous radiation
pumping
predictions
scattering

Citeer dit

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Rate-equation theory of a feedback insensitive unidirectional semiconductor ring laser. / van Schaijk, T.T.M.; Lenstra, D.; Bente, E.A.J.M.; Williams, K.A.

In: Optics Express, Vol. 26, Nr. 10, 14.05.2018, blz. 13361-13369.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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