Phase-locked, high power, mid-infrared quantum cascade laser arrays
Abstract
We demonstrate phase-locked, high power quantum cascade laser arrays, which are combined using a monolithic, tree array multimode interferometer, with emission wavelengths around 4.8 μm. A maximum output power of 15 W was achieved from an eight-element laser array, which has only a slightly higher threshold current density and a similar slope efficiency compared to a Fabry-Perot laser of the same length. Calculated multimode interferometer splitting loss is on the order of 0.27 dB for the in-phase supermode. In-phase supermode operation with nearly ideal behavior is demonstrated over the working current range of the array.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 30, 2018
- Source ID
- 10.1063/1.5028281
Entities
People
- M. Razeghi
- S. Slivken
- Weibin Zhou
Organizations
- Northwestern University
- Office of Naval Research Global