Low Threshold Current Density Operation of Strain-Compensated Quantum Cascade Laser

2007 ◽  
Vol 24 (3) ◽  
pp. 717-720 ◽  
Author(s):  
Shao Ye ◽  
Li Lu ◽  
Liu Jun-Qi ◽  
Liu Feng-Qi ◽  
Wang Zhan-Guo
Keyword(s):  
Quantum Cascade Laser ◽  
Current Density ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Low Threshold

scholarly journals THz Quantum Cascade Laser Operating Frequency Comb Over Near-full-current Dynamic Range

2021 ◽  
Author(s):  
Yu Ma ◽  
Yuan-Yuan Li ◽  
Junqi Liu ◽  
Ning Zhuo ◽  
Wei-Jiang Li ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Current Density ◽  
Dynamic Range ◽  
Frequency Comb ◽  
Dispersion Compensation ◽  
Temperature Stability ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Plasma Waveguide ◽  
Quantum Cascade

Abstract We report a terahertz quantum cascade laser frequency comb (THz QCL FC) with low threshold current density, high power, and wide current dynamic range. The active region design with the semi-insulated surface plasma waveguide is beneficial to optimize the gain dispersion value and temperature stability. At 10K, the comb with 3-mm-long and 150-µm-wide is capable of emitting 22mW with the threshold current density Jth = 64.4 A·cm−2. The total spectral emission is of about 300 GHz centered around 4.6 THz. Without any extra dispersion compensation measures, the intermode beatnote map reveals stable frequency comb operating within a current dynamic range more than 97% and the narrowest beatnote linewidth is 7.2 kHz. The stable FC operation of a free-running THz QCL makes our device an ideal source for further development of dual-comb spectroscopy.

Low threshold current density distributed feedback quantum cascade lasers with deep top gratings

2006 ◽  
Vol 89 (16) ◽  
pp. 161102 ◽  
Author(s):  
Gangyi Xu ◽  
Aizhen Li ◽  
Yaoyao Li ◽  
Lin Wei ◽  
Yonggang Zhang ◽  
...  
Keyword(s):  
Current Density ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Distributed Feedback ◽  
Quantum Cascade ◽  
Low Threshold ◽  
Cascade Lasers

Highly temperature insensitive, low threshold-current density (λ = 8.7–8.8 μm) quantum cascade lasers

2015 ◽  
Vol 106 (15) ◽  
pp. 151106 ◽  
Author(s):  
J. D. Kirch ◽  
C.-C. Chang ◽  
C. Boyle ◽  
L. J. Mawst ◽  
D. Lindberg ◽  
...  
Keyword(s):  
Current Density ◽  
Quantum Cascade Lasers ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Quantum Cascade ◽  
Low Threshold ◽  
Cascade Lasers
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