Title :
Design of a laser diode pumped 100 /spl mu/J regenerative Cr:LiSGaF fs-amplifier
Author :
Russbuldt, R. ; Mans, T. ; Hoffmann, D. ; Poprawe, R.
Author_Institution :
Fraunhofer-Inst. fur Lasertechnik, Aachen, Germany
Abstract :
Summary form only given. In the realized setup a 12 mm long brewster cut Cr:LiSGaF crystal is pumped double-sided with 2 /spl times/ 25 W diode bars at 685 nm. After collimation, microstep mirrors, polarization coupling, telecentric cylindrical telescope, caustic formation and relay optics for increased working distance a square 180 /spl mu/m/sup 2/ spot, M/sup 2/ = 40 in both axes and 6.3 W at the laser crystal is achieved. In QCW operation (63 ps pulsewith, 2-6 kHz) with 2% output coupling >51% slope efficiency are attained. Recalculated optics will avoid clipping, so 10 W at nominal current and 12 W QCW appear attainable. Currently a second pump module is incorporated, so 200 pJ before compression seems feasible.
Keywords :
chromium; lithium compounds; optical design techniques; optical pulse generation; optical pumping; solid lasers; strontium compounds; 10 W; 100 muJ; 12 W; 12 mm; 180 micron; 200 pJ; 25 W; 6.3 W; 63 ps; 685 nm; LiSrGaF/sub 6/:Cr; QCW operation; brewster cut Cr:LiSGaF crystal; caustic formation; collimation; compression; design; double-sided pumping; laser crystal; laser diode pumped regenerative Cr:LiSGaF fs-amplifier; microstep mirrors; nominal current; output coupling; polarization coupling; relay optics; second pump module; slope efficiency; telecentric cylindrical telescope; working distance; Bars; Diode lasers; Laser excitation; Mirrors; Optical collimators; Optical coupling; Optical design; Optical polarization; Optical pumping; Telescopes;
Conference_Titel :
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-706-7
DOI :
10.1109/CLEO.2002.1034112
