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5 January 1994 Beam shaping of laser diodes with binary diffraction optics
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A diffractive optical system consisting of one single binary CGH with high numerical aperture (N.A. > 0.7) for collimating or focusing laser-diode radiation is presented. Taking into account the exact phase distribution for a certain injection current of the laser-diode all aberrations of the phase can be corrected: A theoretically circular symmetric and diffraction limited spot can be obtained without astigmatism. High diffraction efficiencies can be expected by using high frequent binary reflection holograms where higher diffraction orders become evanescent. The zero order can be minimized by selecting an adequate relief thickness. Thus local DEs of the designed CGH can achieve DEs of theoretically 100%.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Michel Asfour and Theo T. Tschudi "Beam shaping of laser diodes with binary diffraction optics", Proc. SPIE 2041, Mode-locked and Other Ultrashort Laser Designs, Amplifiers, and Applications, (5 January 1994);

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