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21 February 2007 mJ pulse energy fiber lasers based on Yb-doped photonic crystal fibers
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Ytterbium-doped double-clad photonic crystal fibres (PCF) are ideal candidates for amplification of diffraction limited pulses to energies of several mJ. The combination of large mode field diameter (MFD), large pump area and high numerical aperture allows for low cost multimode diode pumping of short fiber lengths with high pump absorption and high thresholds for detrimental non-linear effects. We present results from ns-pulsed Q-switched laser and MOPA systems with pulse energies exceeding 1mJ and peak powers up to 17kW, by using a PCF with MFD of 24&mgr;m. The results are scalable with the PCF MFD to much higher pulse energies. Recent reports on truly single mode PCF with MFD up to 100&mgr;m indicates in this way, that pulse energies exceeding 10mJ could be reached.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas Feuchter and Ole Lumholt "mJ pulse energy fiber lasers based on Yb-doped photonic crystal fibers", Proc. SPIE 6453, Fiber Lasers IV: Technology, Systems, and Applications, 64531X (21 February 2007);

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