US 11,901,703 B2
QCL with branch structure and related methods
Arkadiy Lyakh, Oviedo, FL (US)
Assigned to UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC., Orlando, FL (US)
Filed by UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC., Orlando, FL (US)
Filed on Jun. 28, 2021, as Appl. No. 17/304,881.
Application 17/304,881 is a continuation of application No. 17/304,269, filed on Jun. 17, 2021.
Claims priority of provisional application 63/040,212, filed on Jun. 17, 2020.
Prior Publication US 2021/0399527 A1, Dec. 23, 2021
Int. Cl. H01S 5/34 (2006.01); H01S 5/10 (2021.01); H01S 5/22 (2006.01)
CPC H01S 5/3402 (2013.01) [H01S 5/1007 (2013.01); H01S 5/1014 (2013.01); H01S 5/1082 (2013.01); H01S 5/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A quantum cascade laser (QCL) comprising:
a substrate; and
a semiconductor layer adjacent the substrate and defining
a plurality of branch active regions, and
a stem region coupled to output ends of the plurality of branch active regions;
each branch active region comprising
a plurality of laser cores, and
a plurality of spacer layers respectively interweaved between the plurality of laser cores,
a dielectric layer over the plurality of laser cores, and the plurality of spacer layers, the plurality of spacer layers extending laterally to the dielectric layer,
the plurality of laser cores having a number of stages less than 50.