High-output-power and high-temperature operation of blue GaN-based vertical-cavity surface-emitting laser
Open Access
- 2 October 2018
- journal article
- research article
- Published by IOP Publishing in Applied Physics Express
- Vol. 11 (11), 112101
- https://doi.org/10.7567/apex.11.112101
Abstract
High output power values of 15.7 mW at 20 °C and 2.7 mW at 110 °C were obtained from a blue GaN-based vertical-cavity surface-emitting laser (VCSEL) under continuous-wave operation as a result of introducing a long-cavity (10λ) structure. The threshold current and voltage at 20 °C were 4.5 mA and 5.1 V, respectively. Owing to the reduced thermal resistance provided by the long-cavity structure and the adjusted reflectivity of the front cavity mirror, this VCSEL also exhibited a high slope efficiency of 0.87 W/A, a differential quantum efficiency of 31%, and a wall-plug efficiency of 8.9%.Keywords
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