Abstract
Asymmetric laser heterostructure was developed to improve beam properties of GaSb-based diode lasers emitting near 2 μm. It was demonstrated that the lasers with narrow waveguide and asymmetric claddings could have fast at is beam divergence below 40°. High-power diode lasers with 100-μm-wide output aperture generate more than 1.5W of continuous wave (CW) output power in a beam with fast at is beam divergence of 50°. Power conversion efficiency of the 2 μm emitters peaked at 28%. CW threshold current density of 85 A/cm 2 was achieved at 20 °C. Passively cooled 18-element linear laser arrays generated more than 10W of CW power at 50 A. Above 3W of CW power was obtained from 7-fiber bundle at 7A.
| Original language | English |
|---|---|
| Pages (from-to) | 1464-1469 |
| Number of pages | 6 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 46 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2010 |
Keywords
- Asymmetric waveguide
- Beam divergence
- Diode lasers
- Fiber bundle
- High power
- Laser array
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