One facet of each of a set of N semiconductor laser chips is provided with an antireflection coating through which the chip emission is coupled, via a wavelength multiplexer, with a partially reflecting Bragg reflector providing an N-way wavelength multiplexed laser output for pumping an optical amplifier....http://www.google.fr/patents/US6130899?utm_source=gb-gplus-shareBrevet US6130899 - Laser assembly
