Watt-class high-power, high-beam-quality photonic-crystal lasers
Watt-class high-power, high-beam-quality photonic-crystal lasers
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DOI：
10.1038/nphoton.2014.75
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发表时间：
2014-05-01
期刊：
影响因子：
35
通讯作者：
Noda, Susumu
中科院分区：
文献类型：
--
作者：
Hirose, Kazuyoshi;Liang, Yong;Noda, Susumu
The applications of surface-emitting lasers, in particular vertical-cavity surface-emitting lasers (VCSELs), are currently being extended to various low-power fields including communications and interconnections. However, the fundamental difficulties in increasing their output power by more than several milliwatts while maintaining single-mode operation prevent their application in high-power fields such as material processing, laser medicine and nonlinear optics, despite their advantageous properties of circular beams, the absence of catastrophic optical damage, and their suitability for two-dimensional integration. Here, we demonstrate watt-class high-power, single-mode operation by a two-dimensional photonic-crystal surface-emitting laser under room-temperature, continuous-wave conditions. The two-dimensional band-edge resonant effect of a photonic crystal formed by metal-organic chemical vapour deposition enables a 1,000 times broader coherent-oscillation area, which results in a high beam quality of M-2
