Injectorless quantum-cascade lasers
An {open_quotes}injectorless{close_quotes} quantum-cascade (QC) laser is presented. The requirement of using injector regions to transport electrons from the lower laser level and other low-lying energy levels of one active region to the upper laser level of the next electron-downstream active region was eliminated by using an appropriately designed double-quantum-well {open_quotes}chirped{close_quotes} superlattice active region. The major advantage of the {open_quotes}injectorless{close_quotes} QC laser is the close packing of the active regions and the concomitant large optical confinement factor. Using a cascade of 75 consecutive active regions, designed for emission at {lambda}=11.5{mu}m, a pulsed peak output power of 270 mW is achieved at 7 K and approximately 10 mW at the maximum operating temperature of 195 K. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204519
- Journal Information:
- Applied Physics Letters, Vol. 78, Issue 25; Other Information: DOI: 10.1063/1.1378805; Othernumber: APPLAB000078000025003950000001; 017124APL; PBD: 18 Jun 2001; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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