TY - JOUR
T1 - Short-injector quantum cascade laser emitting at 8-μm wavelength with high slope efficiency
AU - Vizbaras, Augustinas
AU - Katz, Simeon
AU - Boehm, Gerhard
AU - Amann, Markus Christian
PY - 2009
Y1 - 2009
N2 - This letter presents experimental results of a three-alloy-based short-injector quantum cascade laser (QCL). The investigated 4-mm-long device shows a pulsed threshold current density of 1.24 kA/cm2, a slope efficiency of 1.4 W/A, a characteristic temperature above 250 K, and a peak average output power above 726 mW at room temperature. A good high-temperature performance is attributed to the diagonal transition design and better depopulation of the lower laser levels at higher temperatures. The laser emission wavelength at room temperature is 8 μm, resulting in a low voltage defect of 71 meV per period for the QCL structure.
AB - This letter presents experimental results of a three-alloy-based short-injector quantum cascade laser (QCL). The investigated 4-mm-long device shows a pulsed threshold current density of 1.24 kA/cm2, a slope efficiency of 1.4 W/A, a characteristic temperature above 250 K, and a peak average output power above 726 mW at room temperature. A good high-temperature performance is attributed to the diagonal transition design and better depopulation of the lower laser levels at higher temperatures. The laser emission wavelength at room temperature is 8 μm, resulting in a low voltage defect of 71 meV per period for the QCL structure.
KW - High T
KW - High slope efficiency
KW - Mid-IR semiconductor lasers
KW - Short-injector quantum cascade laser (QCL)
UR - http://www.scopus.com/inward/record.url?scp=70349592944&partnerID=8YFLogxK
U2 - 10.1109/LPT.2009.2027334
DO - 10.1109/LPT.2009.2027334
M3 - Article
AN - SCOPUS:70349592944
SN - 1041-1135
VL - 21
SP - 1384
EP - 1386
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 19
ER -