GaSb surface grating distributed feedback interband cascade laser emitting at 3.25 µm
A second-order distributed feedback interband cascade laser emitting at 3.25 µm was designed, grown, and fabricated. By coherent epitaxy of a GaSb cap layer instead of the conventional thin InAs cap on top of the laser structure, a high-quality surface grating was made of GaSb and gold. Enough coupl...
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| Veröffentlicht in: | Optics express 2022-08, Vol.30 (16), p.29007-29014 |
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| container_title | Optics express |
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| creator | Ning, Chao Sun, Rui-Xuan Liu, Shu-man Zhang, Jin-Chuan Zhuo, Ning Liu, Jun-Qi Wang, Li-Jun Zhai, Shen-qiang Liu, Feng-Qi Wang, Zahn-Guo |
| description | A second-order distributed feedback interband cascade laser emitting at 3.25 µm was designed, grown, and fabricated. By coherent epitaxy of a GaSb cap layer instead of the conventional thin InAs cap on top of the laser structure, a high-quality surface grating was made of GaSb and gold. Enough coupling strength and a significant inter-modal loss difference were predicted according to the simulation within the framework of couple-wave theory. Lasers having 2-mm-long cavities and 4.5-µm-wide ridges with high-/anti-reflection coatings were fabricated. The continuous-wave threshold current and maximum single-mode output power were 60 mA and 24 mW at 20°C, respectively. The output power of 5 mW was still kept at 55°C. Continuous tuning free from mode hopping and high single-mode suppression ratios (>20 dB) were realized at all injection currents and heat-sink temperatures, covering a spectral range of over 20 cm
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| doi_str_mv | 10.1364/OE.465716 |
| format | Article |
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.</description><identifier>ISSN: 1094-4087</identifier><identifier>EISSN: 1094-4087</identifier><identifier>DOI: 10.1364/OE.465716</identifier><language>eng</language><ispartof>Optics express, 2022-08, Vol.30 (16), p.29007-29014</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2126-16784f972c69ce33347547dfc5335060cbfa3b5508eecc884cf4d56ac98910e33</citedby><cites>FETCH-LOGICAL-c2126-16784f972c69ce33347547dfc5335060cbfa3b5508eecc884cf4d56ac98910e33</cites><orcidid>0000-0002-9470-8565 ; 0000-0001-6992-6942 ; 0000-0003-1654-6174</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,27901,27902</link.rule.ids></links><search><creatorcontrib>Ning, Chao</creatorcontrib><creatorcontrib>Sun, Rui-Xuan</creatorcontrib><creatorcontrib>Liu, Shu-man</creatorcontrib><creatorcontrib>Zhang, Jin-Chuan</creatorcontrib><creatorcontrib>Zhuo, Ning</creatorcontrib><creatorcontrib>Liu, Jun-Qi</creatorcontrib><creatorcontrib>Wang, Li-Jun</creatorcontrib><creatorcontrib>Zhai, Shen-qiang</creatorcontrib><creatorcontrib>Liu, Feng-Qi</creatorcontrib><creatorcontrib>Wang, Zahn-Guo</creatorcontrib><title>GaSb surface grating distributed feedback interband cascade laser emitting at 3.25 µm</title><title>Optics express</title><description>A second-order distributed feedback interband cascade laser emitting at 3.25 µm was designed, grown, and fabricated. By coherent epitaxy of a GaSb cap layer instead of the conventional thin InAs cap on top of the laser structure, a high-quality surface grating was made of GaSb and gold. Enough coupling strength and a significant inter-modal loss difference were predicted according to the simulation within the framework of couple-wave theory. Lasers having 2-mm-long cavities and 4.5-µm-wide ridges with high-/anti-reflection coatings were fabricated. The continuous-wave threshold current and maximum single-mode output power were 60 mA and 24 mW at 20°C, respectively. The output power of 5 mW was still kept at 55°C. Continuous tuning free from mode hopping and high single-mode suppression ratios (>20 dB) were realized at all injection currents and heat-sink temperatures, covering a spectral range of over 20 cm
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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| title | GaSb surface grating distributed feedback interband cascade laser emitting at 3.25 µm |
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