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28 April 1995 Coherent array of 900 semiconductor laser amplifiers
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The design, fabrication, and testing of a two-dimensional array of 900 laser diode power amplifiers injected by a single semiconductor master oscillator is discussed. This array extends the results of the 200-emitter array reported on last year. The array consists of a stack of ten 100-emitter linear arrays. Nine of the 100-emitter arrays were successfully stacked and injected by a semiconductor master oscillator laser by way of a 1 to 10 semiconductor ridge- waveguide splitter and amplifier array. The tenth 100-emitter array was included in the stack but the fiber optic used to connect it to the 1 to 10 splitter broke before final strain-relief was added. The 900 amplifiers produced approximately 36 W of coherent power in the near field. Poor fill optics allowed only 15.6 W to be delivered to the far field of which 5.5 W were phase aligned into a narrow beam in one axis and into 5 major spots in the other axis. Improved optics and higher power emitters are the next steps in moving this array architecture to high power and brightness.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joseph L. Levy and Kun Roh "Coherent array of 900 semiconductor laser amplifiers", Proc. SPIE 2382, Laser Diodes and Applications, (28 April 1995);

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