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9 October 2018 Pulse shaping by incoherent beam combining of several Watt-level QCL modules at 4.0 μm
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Abstract
We report on the temporally controlled combination of the emission of multiple quantum cascade laser modules. The combination is demonstrated and allows for temporal pulse shaping at a target position. The laser chips are packaged individually in stand-alone modules that can provide an average optical output power on Watt-level. Timing is provided by integrated microcontrollers which allow for comfortable output synchronization of several modules. Thus we have reached a timing accuracy in the order of better than 10 ns. The operation is demonstrated for a wavelength of λ = 4 μm, but can be easily adapted to other wavelengths that are relevant for sensing, free space communication or directional infrared counter measure applications.
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F. Münzhuber and R. G. Speer "Pulse shaping by incoherent beam combining of several Watt-level QCL modules at 4.0 μm", Proc. SPIE 10797, Technologies for Optical Countermeasures XV, 107970M (9 October 2018); https://doi.org/10.1117/12.2326593
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