title: Continuous wave operation of buried heterostructure 4.6 µm quantum cascade laser Y-junctions and tree arrays.
abstract: 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.
authors: Arkadiy
authors: A
authors: Lyakh
authors: Richard
authors: R
authors: Maulini
authors: Alexei
authors: A
authors: Tsekoun
authors: Rowel
authors: R
authors: Go
authors: C Kumar N
authors: CK
authors: Patel