Watt-level, high wall plug efficiency, continuous-wave room temperature quantum cascade laser emitting at 7.7μm
In this article, a InP based strain-balanced In0.58Ga0.42As/In0.47Al0.53As quantum cascade laser emitting at 7.7 mu m is reported. The active region is based on a slightly-diagonal bound to continuum design with 50 cascade stages and a low voltage defect Delta(inj) of 96 meV. By optimizing the activ...
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| Veröffentlicht in: | Optics express 2020-12, Vol.28 (26), p.40155-40163 |
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| container_title | Optics express |
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| creator | Wang, Huan Zhang, Jinchuan Cheng, Fengmin Zhuo, Ning Zhai, Shenqiang Liu, Junqi Wang, Lijun Liu, Shuman Liu, Fengqi Wang, Zhanguo |
| description | In this article, a InP based strain-balanced In0.58Ga0.42As/In0.47Al0.53As quantum cascade laser emitting at 7.7 mu m is reported. The active region is based on a slightly-diagonal bound to continuum design with 50 cascade stages and a low voltage defect Delta(inj) of 96 meV. By optimizing the active region and waveguide structure, the waveguide loss alpha(w) of 1.18cm(-1) are obtained, which contribute to a high wall-plug efficiency (WPE) of 9.08% and low threshold current of only 1.09 kA/cm(2) in continuous-wave(CW) operation at 293K. The maximum single facet output power of 1.17W in CW operation and 2.3W in pulsed operation are measured at 293K. The narrow ridge and buried ridge structure epi-side-down-mounted on the diamond heatsink improved the heat dissipation of the device. A beam of pure zero order mode and a broad external-cavity tuning range from 7.16 mu m to 8.16 mu m are also achieved. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| doi_str_mv | 10.1364/OE.412943 |
| format | Article |
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The active region is based on a slightly-diagonal bound to continuum design with 50 cascade stages and a low voltage defect Delta(inj) of 96 meV. By optimizing the active region and waveguide structure, the waveguide loss alpha(w) of 1.18cm(-1) are obtained, which contribute to a high wall-plug efficiency (WPE) of 9.08% and low threshold current of only 1.09 kA/cm(2) in continuous-wave(CW) operation at 293K. The maximum single facet output power of 1.17W in CW operation and 2.3W in pulsed operation are measured at 293K. The narrow ridge and buried ridge structure epi-side-down-mounted on the diamond heatsink improved the heat dissipation of the device. A beam of pure zero order mode and a broad external-cavity tuning range from 7.16 mu m to 8.16 mu m are also achieved. 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The active region is based on a slightly-diagonal bound to continuum design with 50 cascade stages and a low voltage defect Delta(inj) of 96 meV. By optimizing the active region and waveguide structure, the waveguide loss alpha(w) of 1.18cm(-1) are obtained, which contribute to a high wall-plug efficiency (WPE) of 9.08% and low threshold current of only 1.09 kA/cm(2) in continuous-wave(CW) operation at 293K. The maximum single facet output power of 1.17W in CW operation and 2.3W in pulsed operation are measured at 293K. The narrow ridge and buried ridge structure epi-side-down-mounted on the diamond heatsink improved the heat dissipation of the device. A beam of pure zero order mode and a broad external-cavity tuning range from 7.16 mu m to 8.16 mu m are also achieved. 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The active region is based on a slightly-diagonal bound to continuum design with 50 cascade stages and a low voltage defect Delta(inj) of 96 meV. By optimizing the active region and waveguide structure, the waveguide loss alpha(w) of 1.18cm(-1) are obtained, which contribute to a high wall-plug efficiency (WPE) of 9.08% and low threshold current of only 1.09 kA/cm(2) in continuous-wave(CW) operation at 293K. The maximum single facet output power of 1.17W in CW operation and 2.3W in pulsed operation are measured at 293K. The narrow ridge and buried ridge structure epi-side-down-mounted on the diamond heatsink improved the heat dissipation of the device. A beam of pure zero order mode and a broad external-cavity tuning range from 7.16 mu m to 8.16 mu m are also achieved. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement</abstract><cop>WASHINGTON</cop><pub>Optica Publishing Group</pub><pmid>33379547</pmid><doi>10.1364/OE.412943</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Web of Science - Science Citation Index Expanded - 2020<img src="https://exlibris-pub.s3.amazonaws.com/fromwos-v2.jpg" />; Alma/SFX Local Collection |
| subjects | Optics Physical Sciences Science & Technology |
| title | Watt-level, high wall plug efficiency, continuous-wave room temperature quantum cascade laser emitting at 7.7μm |
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