Beam shaping in high-power broad-area quantum cascade lasers using optical feedback
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/srep44284
Abstract: Broad-area quantum cascade lasers with high output powers are highly desirable sources for various applications including infrared countermeasures. However, such structures suffer from strongly deteriorated beam quality due to multimode behavior, diffraction of light and… read more here.
Keywords: feedback; broad area; optical feedback; cascade lasers ... See more keywords
Distributed loss method to suppress high order modes in broad area quantum cascade lasers
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.5006042
Abstract: We describe a method where the standard fabrication of broad area quantum cascade lasers is modified to provide a controlled amount of direct contact of device sidewalls with metal. We demonstrate that this provides sufficient… read more here.
Keywords: area quantum; quantum; broad area; cascade lasers ... See more keywords
Broad area quantum cascade lasers operating in pulsed mode above 100 ℃ at λ ~4.7 μ m
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Semiconductors"
DOI: 10.1088/1674-4926/38/7/074005
Abstract: We demonstrate a broad area (400 μ m) high power quantum cascade laser (QCL). A total peak power of 62 W operating at room temperature is achieved at λ ~4.7 μ m. The temperature dependence… read more here.
Keywords: area quantum; cascade lasers; quantum cascade; broad area ... See more keywords
Power scaling and experimentally fitted model for broad area quantum cascade lasers in continuous wave operation
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.57.1.011011
Abstract: Abstract. Experimental and model results for 15-stage broad area quantum cascade lasers (QCLs) are presented. Continuous wave (CW) power scaling from 1.62 to 2.34 W has been experimentally demonstrated for 3.15-mm long, high reflection-coated QCLs… read more here.
Keywords: area quantum; broad area; power; model ... See more keywords
Experimental investigation of broad area quantum cascade lasers under external feedback.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.017927
Abstract: Mode creation and temporal response of broad-area quantum cascade lasers (BA-QCL) placed within an external feedback cavity are described in this publication. The critical feedback parameter becomes the mirror angle relative to the BA-QCL facet.… read more here.
Keywords: area quantum; external feedback; feedback; broad area ... See more keywords
Spatially modulated broad-area lasers for narrow lateral far-field divergence.
Sign Up to like & getrecommendations! Published in 2021 at "Optics express"
DOI: 10.1364/oe.430804
Abstract: A novel laser design is presented that combines a longitudinal-lateral gain-loss modulation with an additional phase tailoring achieved by etching rectangular trenches. At 100 A pulsed operation, simulations predict a far-field profile with 0.3° full width… read more here.
Keywords: far field; spatially modulated; field; modulated broad ... See more keywords
Stabilization of broad-area semiconductor laser sources by simultaneous index and pump modulations.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.002511
Abstract: We show that the emission of broad-area semiconductor amplifiers and lasers can be efficiently stabilized by introducing two-dimensional periodic modulations simultaneously on both the refractive index and the pump (gain-loss) profiles in the transverse and… read more here.
Keywords: index; pump; area semiconductor; broad area ... See more keywords
Spectral linewidth narrowing of broad-area blue diode bar in V-shape external Talbot cavity.
Sign Up to like & getrecommendations! Published in 2022 at "Optics letters"
DOI: 10.1364/ol.456782
Abstract: A 1-D linear array of 23 high-power broad-area laser diode (BALD) beams in the blue spectral region (447 nm) is combined employing a V-shape external Talbot cavity in Littrow configuration. A surface grating provides optical feedback… read more here.
Keywords: cavity; diode; diode bar; broad area ... See more keywords