Abstract
High power AlGaAs laser diode arrays which emit in the 800 nm region can be used to efficiently pump Nd doped solid state lasers. The pumping geometry used to couple the diode array output to the laser material must satisfy two conflicting criteria: efficient absorption and uniform deposition. Since the diode energy is absorbed exponentially in accordance with Beer's law, high absorption coefficients produce large variations in energy deposition while low coefficients resu1t in reduced pumping efficiency. We present the initial results of experiments performed on a five array pump head which utilizes reversed non-imaging concentrators to couple the diode energy into Nd:YAG and Nd:YLF rods with high efficiency and uniform energy deposition.
© 1990 Optical Society of America
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