| Low Threshold Distributed Feedback Quantum Cascade Lasers with Widely Spaced Emission Wavelengths |
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| 作者姓名： | 李耀耀 徐刚毅 李爱珍 魏林 李华 梅斌 |
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| 作者单位： | State Key Laboratory of Fhnctional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60406008, 60676026 and 60136010, the National High Technology Research and Development Programme of China under Grant No 2006AA03Z0406, and the National Basic Research Programme of China under Grant No 2006CB604903. |
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| 摘 要： | We report lasing properties of distributed feedback quantum cascade lasers （DFB QCLs） including a doublephonon-resonance active region, at wavelength of about 8.4 μm. A broad gain spectrum is generated due to the coupling between the lower laser level in the active region and the levels in the injector, and is demonstrated by the lasing spectrum of the corresponding Fabry-Perot QCLs whose width is 0.5 μm at 1.5 times of the threshold current. As a result, the DFB QCLs employing different grating periods exhibit a wavelength span of 0.18μm at room temperature and total wavelength coverage of 0.28μm at various heat sink temperatures. A high side mode suppression ratio of about 30dB and a low threshold current density of 1.78kA/cm^2 are achieved as the lasers operate at room temperature in pulsed mode.
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| 关 键 词： | 低阈值 量子 反馈机制 激光器 发射 波长 |
| 收稿时间： | 2007-6-28 |
| 修稿时间： | 2007-06-28 |
Low Threshold Distributed Feedback Quantum Cascade Lasers with Widely Spaced Emission Wavelengths |
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| LI Yao-Yao,XU Gang-Yi,LI Ai-Zhen,WEI Lin,LI Hua,MEI Bin.Low Threshold Distributed Feedback Quantum Cascade Lasers with Widely Spaced Emission Wavelengths[J].Chinese Physics Letters,2007,24(10):2980-2983. |
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| Authors: | LI Yao-Yao XU Gang-Yi LI Ai-Zhen WEI Lin LI Hua MEI Bin |
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| Institution: | State Key Laboratory of Fhnctional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 |
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| Abstract: | |
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| Keywords: | 78 67 De 73 63 Hs |
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