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We experimentally demonstrate a high peak power, Q-switched pulsed, intracavity coherently combined photonic crystal fiber laser in a power oscillator configuration. Our oscillator system provides record high peak power of ∼0.7 MW.
We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with...
We experimentally investigate passive interferometric coherent combining of two photonic crystal fiber laser channels within a common cavity, wherein only one channel is Q-switched. We demonstrate an average power of more than 20 W and the peak power of 97 kW with more than 98 % combining efficiency. The measured spectral bandwidth is 0.13 nm, and it does not change at different operation conditions...
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