Analysis of thermal characteristics of microchannel-cooled photonic crystal laser diode bars

Meihao Zheng; Hongwei Qu; Guangqiang Liu; Xuyan Zhou; Jianxin Zhang; Aiyi Qi; Jiatong Sui; Yu Zhang

doi:10.1117/12.2643947

27 December 2022 Analysis of thermal characteristics of microchannel-cooled photonic crystal laser diode bars

Meihao Zheng, Hongwei Qu, Guangqiang Liu, Xuyan Zhou, Jianxin Zhang, Aiyi Qi, Jiatong Sui, Yu Zhang

Proceedings Volume 12311, Semiconductor Lasers and Applications XII; 123110B (2022) https://doi.org/10.1117/12.2643947
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

Photonic crystal laser diode bars have the advantages of low vertical divergence angle and high resistance to catastrophic optical mirror damage. However, with the increase of output power, the waste heat problem is becoming more serious, affecting the further improvement of laser performance. Therefore, it is of great significance to study the thermal characteristics of bars. In this paper, the fluid-solid coupling conjugate heat transfer model of a microchannel cooled photonic crystal laser diode bar is established through the Finite Element Method (FEM) and Computational Fluid Dynamics (CFD) numerical methods. The transient thermal behavior, steady-state characteristics, and temperature distribution of photonic crystal laser diode bars under continuous (CW) operating states are studied in detail. The simulation results show that the junction temperature is 55.48°C, and the thermal resistance is 0.48 K/W. The closer the emitter is to the bar center, the easier the thermal crosstalk occurs. In the experiment, the continuous output power of the photonic crystal laser bar is 112.13 W at 120 A, the junction temperature is 57.14 °C, and the thermal resistance is 0.50 K/W. The simulations of bars are consistent with the experiment.

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Citation Download Citation

Meihao Zheng, Hongwei Qu, Guangqiang Liu, Xuyan Zhou, Jianxin Zhang, Aiyi Qi, Jiatong Sui, and Yu Zhang "Analysis of thermal characteristics of microchannel-cooled photonic crystal laser diode bars", Proc. SPIE 12311, Semiconductor Lasers and Applications XII, 123110B (27 December 2022); https://doi.org/10.1117/12.2643947

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