Multimode Regimes in Quantum Cascade Lasers: From Coherent Instabilities to Spatial Hole Burning
Abstract
A systematic experimental and theoretical study of multimode regimes has been performed in high power mid-infrared quantum cascade lasers (QCLs). In narrow devices it is found that above a second threshold the laser spectrum dramatically broadens showing multimode operation with pronounced Rabi sidebands in the envelope of the spectrum. This represents the first direct evidence of the coherent instability associated with population oscillations at the Rabi frequency. For ridge widths much larger than the wavelength, the Rabi sidebands disappear.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 2009
- Accession Number
- ADA509749
Entities
People
- Federico Capasso
- Franz Kaertner
Organizations
- Harvard University