High Performance Interband Cascade Lasers With AlGaAsSb Cladding Layers

We report interband cascade lasers (ICLs) at 3.4 \mu \text{m} wavelength using bulk AlGaAsSb as the cladding layers for optical confinement, with device performance parameters at the same level as the best 5-stage ICLs using InAs/AlSb superlattice cladding layers. The threshold current density of...

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Bibliographic Details
Published in:IEEE photonics technology letters 2022-03, Vol.34 (5), p.291-294
Main Authors: Zhao, Xuyi, Cao, Chunfang, Du, Antian, Yu, Wenfu, Han, Shixian, Liu, Ruotao, Chen, Yuanyu, Yan, Jinyi, Yang, Jin, Huang, Hua, Wang, Hailong, Gong, Qian
Format: Article
Language:English
Subjects:
Cascade lasers
Cladding
Continuous radiation
Current density
ICL laser
Laser modes
Lasers
Quantum cascade lasers
Room temperature
Superlattices
Temperature distribution
Temperature measurement
Threshold current
Threshold currents
Waveguide lasers
Waveguides
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Summary:We report interband cascade lasers (ICLs) at 3.4 \mu \text{m} wavelength using bulk AlGaAsSb as the cladding layers for optical confinement, with device performance parameters at the same level as the best 5-stage ICLs using InAs/AlSb superlattice cladding layers. The threshold current density of broad area ICL with AlGaAsSb cladding layers has been reduced from the previously reported 220 A/cm 2 at room temperature to 130 A/cm 2 at 20 °C. Up to 80 °C operation in continuous-wave mode has been obtained for a 7- \mu \text{m} -wide narrow ridge waveguide ICL which has threshold current density of 177 A/cm 2 at 20 °C, and output power of 42 mW/facet from uncoated facet at 200 mA.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2022.3153334