Continuous wave operation of buried heterostructure 46µm quantum cascade laser Y-junctions and tree arrays | Zendy

Arkadiy Lyakh | Zendy; Richard Maulini | Zendy; Alexei Tsekoun | Zendy; Rowel Go | Zendy; C. Kumar N. Patel | Zendy

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Continuous wave operation of buried heterostructure 46µm quantum cascade laser Y-junctions and tree arrays

Author(s) -

Arkadiy Lyakh,

Richard Maulini,

Alexei Tsekoun,

Rowel Go,

C. Kumar N. Patel

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.001203

Subject(s) - materials science , heterojunction , quantum cascade laser , laser , cascade , optoelectronics , optics , continuous wave , epitaxy , metalorganic vapour phase epitaxy , physics , chemistry , nanotechnology , chromatography , layer (electronics) , terahertz radiation

Room-temperature continuous-wave operation for buried heterostructure 4.6 µm quantum cascade laser Y-junctions and tree arrays, overgrown using hydride vapor phase epitaxy, has been demonstrated. Pulsed wall plug efficiency for the Y-junctions with bending radius of 5mm was measured to be very similar to that of single-emitter lasers from the same material, indicating low coupling losses. Comparison between model and experimental data showed that the in-phase mode was dominating for 10mm-long Y-junctions with 5 µm-wide 1mm-long stem and 5 µm-wide branches. Total optical power over 1.5 W was demonstrated for four-branch QCL tree array.

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