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Xu Gangyi, Li Yaoyao, Li Aizhen, Wei Lin, Zhang Yonggang, Li Hua. Room Temperature,Low Threshold Distributed Feedback Quantum Cascade Lasers[J]. Journal of Semiconductors, 2007, 28(S1): 489-491.
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Xu G Y, Li Y Y, Li A Z, Wei L, Zhang Y G, Li H. Room Temperature,Low Threshold Distributed Feedback Quantum Cascade Lasers[J]. Chin. J. Semicond., 2007, 28(S1): 489.
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Room Temperature,Low Threshold Distributed Feedback Quantum Cascade Lasers
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Abstract
We report on pulsed and continuous-wave operation of single mode tunable distributed feedback quantum cascade lasers at A≈7.7um.A deep top grating and a thin heavily doped InP layer beneath the grating are formed in the upper clad- ding to obtain simultaneously a strong feedback effect and a low waveguide loss.In pulsed operation,a very low threshold current density of 970A/cm2 and a peak power of 75mW are achieved at 300K. Reliable single mode emission with a side mode suppression ratio of~30dB is achieved in a large temperature range(155~320K)with a tuning range of 90nm.The lasets operate in continuous.wave mode up to 130K.-
Keywords:
- mid infrared,
- distributed feedback,
- quantum cascade lasers
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References
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Proportional views