Abstract
An "injectorless" 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 "chirped" superlattice active region. The major advantage of the "injectorless" 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 λ = 11.5 μm, 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.
Original language | English (US) |
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Pages (from-to) | 3950-3952 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 78 |
Issue number | 25 |
DOIs | |
State | Published - Jun 18 2001 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)