AI Article Synopsis
- A new quantum cascade laser array with eight elements operates at room temperature and emits at 8 µm, achieving a high continuous-wave output power of 8.2 W and a wall plug efficiency of 9.5%.
- The array utilizes an in-phase supermode for single-mode emission, featuring a significant side-mode suppression ratio of around 20 dB.
- Additionally, a record wall plug efficiency of 20.4% is reached with a separate single-element Fabry-Perot laser in pulsed mode at 20 °C, thanks to its advanced design characteristics.
Article Abstract
We report a room-temperature eight-element phase-locked quantum cascade laser array emitting at 8 µm with a high continuous-wave power of 8.2 W and wall plug efficiency of 9.5%. The laser array operates primarily via the in-phase supermode and has single-mode emission with a side-mode suppression ratio of ~20 dB. The quantum cascade laser active region is based on a high differential gain (8.7 cm/kA) and low voltage defect (90 meV) design. A record high wall plug efficiency of 20.4% is achieved from a low loss buried ridge type single-element Fabry-Perot laser operating in pulsed mode at 20 °C.
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| http://dx.doi.org/10.1364/OE.27.015776 | DOI Listing |
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