Abstract
A hybrid continuous-wave Fe:ZnSe laser amplifier seeded with a mid-infrared quantum cascade laser is demonstrated. A maximum output power of 870 mW with an extraction efficiency of 30 % was achieved from the Fe:ZnSe amplifier seeded by a 200-mW laser at 4.0 µm, corresponding to a gain of approximately 4.4. When the amplifier was seeded by a 150-mW laser at 4.6 µm, an effective gain of approximately 1.4 was obtained. Additionally, we present a theoretical analysis to provide possible routes for further optimization of this Fe:ZnSe amplifier system.
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