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Laser beam combining for high-power, high-radiance sources

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1 Author(s)
Fan, T.Y. ; Quantum Electron. Group, MIT Lincoln Lab., Cambridge, MA, USA

Beam combining of laser arrays with high efficiency and good beam quality for power and radiance (brightness) scaling is a long-standing problem in laser technology. Recently, significant progress has been made using wavelength (spectral) techniques and coherent (phased array) techniques, which has led to the demonstration of beam combining of a large semiconductor diode laser array (100 array elements) with near-diffraction-limited output (M2∼1.3) at significant power (35 W). This paper provides an overview of progress in beam combining and highlights some of the tradeoffs among beam-combining techniques.

Published in:

Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:11 ,  Issue: 3 )

Date of Publication:

May-June 2005

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