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10 June 2024 An approach to realize passively coupled PCSEL arrays
Chhabindra Gautam, Mingsen Pan, Yudong Chen, Thomas Rotter, Ganesh Balakrishnan, Weidong Zhou
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Proceedings Volume PC13029, Laser Technology for Defense and Security XIX; PC1302901 (2024) https://doi.org/10.1117/12.3017582
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States
Abstract
Single PCSEL devices have been demonstrated to have Watt-class output. Due to the inhomogeneous optical mode distribution, such large-area PCSEL devices may suffer from saturation of lasing efficiency under high biasing conditions when the spatial hole burning, and band distortion effects result in decreased gain to the fundamental mode and increased gain to the high-order modes. On the other hand, it has been a challenging task to achieve coherent beam combining and single-mode emission based on the VCSELs or DFB lasers. PCSEL architecture has stronger in-plane optical coupling control through the evanescent wave leakage between the cavities. In this paper, we present design and simulation of PCSEL arrays with experimental demonstration of single dominant spatial mode profile obtaining output power of 250 mW from 2-by-2 PCSEL arrays under pulsed operation. Our uncooled PCSEL arrays exhibit 0.22 nm linewidth above threshold compared to 0.075 nm for a single 100 µm PCSELs.
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Chhabindra Gautam, Mingsen Pan, Yudong Chen, Thomas Rotter, Ganesh Balakrishnan, and Weidong Zhou "An approach to realize passively coupled PCSEL arrays", Proc. SPIE PC13029, Laser Technology for Defense and Security XIX, PC1302901 (10 June 2024); https://doi.org/10.1117/12.3017582
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KEYWORDS
Semiconductor lasers
Feedback control
Laser applications
Optical coherence
Photonic crystals
Quantum experiments
Vertical cavity surface emitting lasers
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