Regrowth-free mid-infrared distributed feedback quantum cascade lasers with sub-watt power consumption
- Resource Type
- Authors
- Clifford Frez; Romain Blanchard; Christian Pflügl; Ryan M. Briggs; Siamak Forouhar; Mathieu Fradet
- Source
- SPIE Proceedings.
- Subject
- Distributed feedback laser
Materials science
business.industry
Physics::Optics
02 engineering and technology
Laser
Cladding (fiber optics)
law.invention
020210 optoelectronics & photonics
Optics
law
Quantum dot laser
Cascade
0202 electrical engineering, electronic engineering, information engineering
Optoelectronics
Wafer
business
Quantum well
Tunable laser
- Language
- ISSN
- 0277-786X
We report on room-temperature, continuous-wave operation of single-mode quantum cascade lasers designed for minimal threshold power consumption in the 4 to 10 μm spectral range. Narrow-ridge distributed feedback lasers were developed with plasma-etched sidewall corrugations and infrared-transparent dielectric cladding, enabling fabrication without any epitaxial steps beyond the initial growth of the planar laser wafer. The devices exhibit single-mode emission with stable, mode-hop-free tuning and side-mode suppression greater than 25 dB. We demonstrate packaged single-mode devices with continuous-wave threshold power consumption near 1 W above room temperature.