Abstract
This paper presents experimental and theoretical results to show that in-phase coherent coupling occurs in high-power
arrays of parabolic bow-tie lasers. Such devices require simple and inexpensive device fabrication, thus providing a cost-effective highpower laser for high-brightness operation at 980 nm. The maximum
brightness achieved was 318MW cm-2sr-1 at 20 times the threshold with far-field full-width at half-maximum less than 1.5 times the diffraction limit, measured without the use of external lenses under low-duty cycle (0.1%) pulsed operation. Results obtained
from double-slit interference experiments show a clear distinction between phase-coherent arrays and corresponding arrays
of independent emitters.
Original language | English |
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Pages (from-to) | 1016-1022 |
Number of pages | 7 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 42 |
Issue number | 10 |
Early online date | 25 Sept 2006 |
DOIs | |
Publication status | Published - 1 Oct 2006 |
Keywords
- Laser arrays
- High-power
- High-brightness
- Phase-locking
- Tapered geometry
- Index-guiding