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Compact high-power optical source for resonant infrared pulsed laser ablation and deposition of polymer materials
|Optics Express 14 (2006), Nr.25, S.12302-12309|
|Zeitschriftenaufsatz, Elektronische Publikation |
|Fraunhofer ILT ()|
We propose a novel tuneable table-top optical source as an alternative to the free electron laser currently used for resonant infrared pulsed laser deposition of polymers. It is based on two-stage pulsed optical parametric amplification using MgO doped periodically poled lithium niobate crystals. Gain in excess of 106 in the first stage and pump depletion of 58% in the second stage were achieved when the system was pumped by a high-power Nd:YVO4 picosecond laser source at 1064 nm and seeded by a CW tuneable diode laser at 1530 nm. An average power of 2 W was generated at 3.5 mu m corresponding to 1.3 mu J pulse energy.