22 April 2005 Coherent (phased array) and wavelength (spectral) beam combining compared (Invited Paper)
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Significant progress has been recently reported on beam combining of arrays of fiber and semiconductor lasers using both coherent (phased array) and wavelength (spectral) techniques. The choice between these two classes of beam-combining techniques has implications for the degree of control required on the array elements and on the optical system that is using the beam-combined array. Coherent beam combining imposes more stringent requirements on array-element control (spectrum, phase, amplitude, and polarization) than wavelength combining. Also, wavelength-combined systems should degrade more gracefully than coherent systems and require fewer changes to optical systems as the number of elements is varied.
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T. Y. Fan, T. Y. Fan, A. Sanchez, A. Sanchez, } "Coherent (phased array) and wavelength (spectral) beam combining compared (Invited Paper)", Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, (22 April 2005); doi: 10.1117/12.596455; https://doi.org/10.1117/12.596455

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