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2013 R&D 100 Winner
V-shaped External Cavity Laser Diode Array (VECLDA)Broad-area laser diode arrays offer high electrical power conversion efficiency (from 50 to 70%), up to 100 W of light power and are relatively inexpensive to fabricate. However, the diodes in the array suffer from multi-transverse mode emission, which means that phase-locking is impossible. This limits beam quality and brightness. Oak Ridge National Laboratory invented an efficient method to extract a high-quality optical beam from a broad-area laser array by using a V-shaped (off-axis) external optical cavity. This technology, built into the V-shaped External Cavity Laser Diode Array (VECLDA), provides narrow spectral linewidth and high coherent power. The cavity provides phase-locking capability through the entire array, and the addition of coherent laser radiation emissions. The current version provides a broader wavelength tunable range than competing products, up to 10 nm, and an opportunity for scalable power.

Technology
Laser diode array

Developers
Oak Ridge National Laboratory


Development Team

Oak Ridge National Laboratory's V-shaped External Cavity Laser Diode Array (VECLDA) development team (l-r): Bo Liu, Yun Liu, Yehuda Braiman.

 










The V-shaped External Cavity Laser Diode Array (VECLDA) Development Team from Oak Ridge National Laboratory
Bo Liu, Principal Developer, Oak Ridge National Laboratory
Yehuda Braiman
Yun Liu

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