Laterally coupled DFB interband cascade laser with tapered ridge
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In this work, single-mode distributed feedback interband cascade lasers with tapered ridges are presented. The lasers consists of a 500 μm long and 5.7 μm wide ridge wave guide section followed by a 1400 μm long tapered section with an output facet width of 35 μm. The device is operational in continuous wave mode and well above room temperature. At 25°C, the threshold current and threshold current density were 81 mA and 324 A/cm², respectively. We demonstrate a tuning range of over 14 nm with side mode suppression ratios larger than 25 dB. The device showed temperature and injection power tuning coefficients of 0,35 nm/K and 4.09 nm/W, respectively. Output powers of 18 mW single mode and 35 mW multimode were achieved.
Becker , S , Scheuermann , J , Weih , R , Nähle , L , König , O , Fischer , M , Köth , J , Höfling , S & Kamp , M 2017 , ' Laterally coupled DFB interband cascade laser with tapered ridge ' Electronics Letters , vol 53 , no. 11 , pp. 743-744 . DOI: 10.1049/el.2017.0853
© 2017, The Institution of Engineering and Technology. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at www.theiet.org / https://doi.org/10.1049/el.2017.0853
Financial support by the German Federal Ministry of Education and Research in terms of the APOSEMA project (contract no: 13N13083) within the funding program Photonics Research Germany is gratefully acknowledged.
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