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Sensitive single-pass transmission measurements for probing the electron distribution of Quantum Cascade lasers under an applied bias are used to extract the intersubband nonparabolicity and single-pass gain of a λ∼10μm Quantum Cascade laser.
Using a 0.5 mm short cavity and high reflectivity coating on both laser facets, room temperature, continuous-wave Quantum Cascade lasers at λ ∼ 5.3 μm are realized with heat dissipation of less than 1.2–1.7 W.
We study the spectral characteristics of spiral-shaped micro-cylindrical quantum cascade lasers with various spiral geometries. With medium deformations and notch angles, our lasers can achieve single-mode emission with a side-mode suppression ratio over 30 dB.
Sensitive single-pass transmission measurements for probing the electron distribution of Quantum Cascade lasers under an applied bias are used to extract the intersubband nonparabolicity and single-pass gain of a lambda~10 mum Quantum Cascade laser.
We study the spectral characteristics of spiral-shaped micro-cylindrical quantum cascade lasers with various spiral geometries. With medium deformations and notch angles, our lasers can achieve single-mode emission with a side-mode suppression ratio over 30 dB.
Using a 0.5 mm short cavity and high reflectivity coating on both laser facets, room temperature, continuous-wave Quantum Cascade lasers at lambda ~ 5.3 mum are realized with heat dissipation of less than 1.2-1.7 W.
Room temperature, continuous-wave operation of lambda~8.2 mum quantum cascade lasers grown by MOCVD is reported. The lasers have been processed as double-channel ridge waveguides without the need for buried heterostructures.
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