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Room Temperature CW Operation of Short Wavelength Quantum Cascade Lasers Made of Strain Balanced Ga _{bm x} In _{bm {1-x}} As/Al _{bm y} In _{bm {1-y}} As Material on InP Substrates

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10 Author(s)
Feng Xie ; Corning, Inc., Corning, NY, USA ; Caneau, C. ; LeBlanc, H.P. ; Visovsky, N.J.
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We present our recent development of short wavelength quantum cascade lasers (QCLs) made of strain balanced GaxIn1-xAs/AlyIn1-yAs material on InP substrates. We demonstrate room temperature continuous-wave (CW) lasing of the fundamental lateral mode at four wavelengths of 4.6, 4.0, 3.8, and 3.5 μm. We obtained 60-mW CW output power at 10 °C and 3.55-μm wavelength, which is the shortest CW lasing wavelength demonstrated at room temperature by a QCL, to the best of our knowledge. We also performed a life test on λ = 4.6 μm QCL chips. To date, we have accumulated the life test data for more than 11 000 and 4100 h under two aging conditions, 20°C and 0.85-A constant current, and 60°C and 1-A constant current, respectively.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:17 ,  Issue: 5 )