High-power operation of quantum cascade lasers endured prolonged air-oxidation

High-power strain-compensated In1-xGaxAs/ln(1-y)Al(y)As quantum cascade lasers (lambda similar to 5.5 mu m) are demonstrated. Peak power at least 1.2W per facet for a 32 mu mx2mm uncoated laser stored in ambient condition for 240 days, is obtained at 80 K. Considering the collection efficiency of 60%, the actual output power is 4W at this temperature.

High-power strain-compensated In1-xGaxAs/ln(1-y)Al(y)As quantum cascade lasers (lambda similar to 5.5 mu m) are demonstrated. Peak power at least 1.2W per facet for a 32 mu mx2mm uncoated laser stored in ambient condition for 240 days, is obtained at 80 K. Considering the collection efficiency of 60%, the actual output power is 4W at this temperature.

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Chinese Acad Sci, Shanghai Inst Tech Phys.; SE Univ.; Chinese Acad Sci.; Natl Nat Sci Fdn China.; IEEE MTT S.; IEEE Nanjing Joint Chapter.; IEEE Shanghai Sub Sect.; Shanghai Int Culture Assoc.; Chinese Phys Soc.; Chinese Opt Soc.; Chinese Inst Elect.

Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

Chinese Acad Sci, Shanghai Inst Tech Phys.; SE Univ.; Chinese Acad Sci.; Natl Nat Sci Fdn China.; IEEE MTT S.; IEEE Nanjing Joint Chapter.; IEEE Shanghai Sub Sect.; Shanghai Int Culture Assoc.; Chinese Phys Soc.; Chinese Opt Soc.; Chinese Inst Elect.