this significantly reduces the effective modal reflectivity facets (18, 16) with a laser angular anti travelling wave amplifier, cupping, part of the wave guide (22, 24) of the amplifier in the immediate vicinity of the facets.thus, we obtain part of low reflectivity by anti reflective treatment (19, 17) are simple, low cost, economy, characterized by production of amplifiers bandwidth range and a high saturation output power.
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