<正>The fabrication and characterization of distributed feedback(DFB) quantum cascade lasers emitting atλ≈8.5μm are reported.The first-order DFB grating structure was defined using the holographic lithography technique.Reliable dynamic single-mode emission with a side-mode suppression ratio of 20 dB and a tuning coefficient of-0.277 cm~(-1)/K from 93 to 210 K is obtained in continuous wave mode by using high-reflectivity coating on the rear facet.The output power is over 100 mW at a temperature of 80 K.
【英文摘要】
The fabrication and characterization of distributed feedback(DFB) quantum cascade lasers emitting atλ≈8.5μm are reported.The first-order DFB grating structure was defined using the holographic lithography technique.Reliable dynamic single-mode emission with a side-mode suppression ratio of 20 dB and a tuning coefficient of-0.277 cm~(-1)/K from 93 to 210 K is obtained in continuous wave mode by using high-reflectivity coating on the rear facet.The output power is over 100 mW at a temperature of 80 K.
【基金】
Project supported by the National Research Projects of China(Nos60525406,60736031,60806018,60906026,2006CB604903, 2007AA03Z446,2009AA03Z403)
【更新日期】
2011-04-26
【分类号】
TN248
【正文快照】
1 .IntroduCti0ll The quantum easeade laser(QCL)15 one of the most Promising light sources for the mid一and far一infrared wave- length range because ofits highPerformaneeandeomPaetsize，and it 15 exPeeted to find a variety ofaPPlieations，such as gas sensi
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