| Citation: |
Gao Yu, Liu Fengqi, Liu Junqi, Li Lu, Wang Lijun, Wang Zhanguo. Tapered quantum cascade lasers operating at 9.0 μm[J]. Journal of Semiconductors, 2010, 31(3): 034008. doi: 10.1088/1674-4926/31/3/034008
Gao Y, Liu F Q, Liu J Q, Li L, Wang L J, Wang Z G. Tapered quantum cascade lasers operating at 9.0 μm[J]. J. Semicond., 2010, 31(3): 034008. doi: 10.1088/1674-4926/31/3/034008.
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Tapered quantum cascade lasers operating at 9.0 μm
doi: 10.1088/1674-4926/31/3/034008
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Abstract
The tapered quantum cascade lasers operating at about 9.0 μm are reported. In contrast to the common ridge waveguide laser, tapered devices give rather small horizontal beam divergence. Performances of devices with identical 11 μm ridge waveguide sections and different tapered gain sections are comparatively studied. The optimal taper angle of 3° leads to a relative high output power and a very small horizontal beam divergence of 7.1°.-
Keywords:
- quantum cascade lasers,
- InGaAs/InAlAs/InP,
- tapered,
- 9.0 m
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References
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