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Optimal oxide-aperture for improving the power conversion efficiency of VCSEL arrays |
Wang Wen-Juan (王文娟), Li Chong (李冲), Zhou Hong-Yi (周弘毅), Wu Hua (武华), Luan Xin-Xin (栾信信), Shi Lei (史磊), Guo Xia (郭霞) |
Photonic Device Research Laboratory, Institute of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China |
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Abstract The maximum power conversion efficiencies of the top-emitting, oxide-confined, two-dimensional integrated 2×2 and 4×4 vertical-cavity surface-emitting laser (VCSEL) arrays with the oxide-apertures of 6 μm, 16 μm, 19 μm, 26 μm, 29 μm, 36 μm, 39 μm, and 46 μm are fabricated and characterized, respectively. The maximum power conversion efficiencies increase rapidly with the augment of oxide-aperture at the beginning and then decrease slowly. A maximum value of 27.91% at an oxide-aperture of 18.6 μm is achieved by simulation. The experimental data are well consistent with the simulation results, which are analyzed by utilizing an empirical model.
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Received: 08 August 2014
Revised: 08 October 2014
Accepted manuscript online:
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PACS:
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42.55.Px
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(Semiconductor lasers; laser diodes)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.60.Lh
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(Efficiency, stability, gain, and other operational parameters)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61222501 and 61335004) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20111103110019). |
Corresponding Authors:
Guo Xia
E-mail: guo@bjut.edu.cn
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Cite this article:
Wang Wen-Juan (王文娟), Li Chong (李冲), Zhou Hong-Yi (周弘毅), Wu Hua (武华), Luan Xin-Xin (栾信信), Shi Lei (史磊), Guo Xia (郭霞) Optimal oxide-aperture for improving the power conversion efficiency of VCSEL arrays 2015 Chin. Phys. B 24 024209
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