Abstract
Quantum cascade lasers have been fabricated with chalcogenide lateral waveguide claddings. Several-micrometer-thick Ge 0.25Se 0.75 glass has been deposited by pulsed laser ablation onto the sidewalls of narrow, deep etched laser ridges. Due to the intrinsically low mid-infrared attenuation of the chalcogenide material, the waveguide loss of the lasers is significantly reduced, by up to ∼50%, depending on the ridge width, when compared to conventional ridge waveguides. This resulted in an improved overall laser performance, such as a reduction of the threshold current density, an increase in slope efficiency, and an improved temperature performance.
Original language | English (US) |
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Pages (from-to) | 182-184 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 13 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2001 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
Keywords
- Chalcogenide glass
- Mid-infrared
- Pulsed laser ablation
- Unipolar semiconductor laser
- Waveguides