Recent years have shown the importance of tunable semiconductor lasers in optical
sensing. We describe the status quo concerning DFB laser diodes between 760 nm and …

In the short space of 15years since their first demonstration, quantum cascade lasers have
become the most useful sources of tunable mid-infrared laser radiation. This Letter …

The design and operating principles of quantum cascade lasers (QCLs) are reviewed along
with recent developments in high-power cw and broadband devices. Cw power levels of …

The temperature dependences of the threshold current and slope efficiency, as represented
by their respective characteristic temperature coefficients T 0 and T 1, are discussed for …

There is an emerging interest in the detection of volatile sulfur compounds (VSCs) in the
breath environment, given their biological relevance as potential signatures of several …

An overview of the three competing mid-infrared semiconductor laser approaches, being
diode, quantum cascade and interband cascade laser designs, is given. Limiting factors as …

The design and implementation of a short wavelength strain-compensated quantum
cascade laser based on In0. 72Ga0. 28As/In0. 52Al0. 48As–AlAs on InP is presented. We …

Designing of a type-II nanoscale heterostructure and simulating their optical properties is
critical for many applications and remains a challenge. This paper reports designing of a …

We present our recent development of short wavelength quantum cascade lasers (QCLs)
made of strain balanced Ga _x In _1-x As/Al _y In _1-y As material on InP substrates. We …

We demonstrate λ∼ 3.5 μ m and λ∼ 3.3 μ m strain compensated In 0.7 Ga 0.3 As/AlAs
(Sb)/InP quantum cascade lasers operating in pulse regime at temperatures up to at least …