We study mode stability in photonic-crystal surface-emitting lasers (PCSELs) with large coupling-coefficient-length product . We observe that mode competition occurs at high current levels above threshold. Our combined experimental and theoretical study provides the first evidence of the mode competition originating from the high-order band-edge modes. The decreased threshold margin between these competing high-order modes and the main lasing mode with increasing cavity length as well as the spatial hole burning effect may deteriorate the single-mode stability. Our finding is essential for designing single-mode high-power PCSELs for which the strategy to suppress the high-order modes must be considered.
Mode stability in photonic-crystal surface-emitting lasers with large
Yong Liang, Tsuyoshi Okino, Kyoko Kitamura, Chao Peng, Kenji Ishizaki, Susumu Noda; Mode stability in photonic-crystal surface-emitting lasers with large . Appl. Phys. Lett. 13 January 2014; 104 (2): 021102. https://doi.org/10.1063/1.4861708
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