Supermode dynamics in coherent VCSEL arrays

Nusrat Jahan; William North; Kent D. Choquette

doi:10.1117/12.2615567

2 March 2022 Supermode dynamics in coherent VCSEL arrays

Nusrat Jahan, William North, Kent D. Choquette

Author Affiliations +

Proceedings Volume 12020, Vertical-Cavity Surface-Emitting Lasers XXVI; 120200A (2022) https://doi.org/10.1117/12.2615567
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We study the supermode dynamics of optically coupled but electrically isolated dual-element photonic crystal vertical cavity surface emitting laser (VCSEL) arrays. The optical coupling is characterized by experimentally extracting a complex coupling coefficient, where the real component is related to the frequency splitting between the two array nonHermitian supermodes, whereas the imaginary coupling coefficient represents the gain difference between these two supermodes. The imaginary coefficient is derived from the coupling-induced excess output power. We compare three photonic crystal periods and find the largest value arising from the closest separation between two cavities. For the array with the highest imaginary component, the real part is determined which is related to the photon-photon modulation resonance, which has the potential to increase the VCSE digital modulation rate.

Conference Presentation

Citation Download Citation

Nusrat Jahan, William North, and Kent D. Choquette "Supermode dynamics in coherent VCSEL arrays", Proc. SPIE 12020, Vertical-Cavity Surface-Emitting Lasers XXVI, 120200A (2 March 2022); https://doi.org/10.1117/12.2615567

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