Generation of 15-nJ pulses from a highly efficient, low-cost multipass-cavity Cr[superscript 3+]:LiCAF laser
Author(s)Demirbas, Umit; Sennaroglu, Alphan; Kaertner, Franz X.; Fujimoto, James G.
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We describe the generation of enhanced pulse energies using a multipass-cavity (MPC) Cr[superscript3] +:LiCAF laser, pumped by inexpensive, single spatial mode laser diodes. A semiconductor saturable absorber was used for stable mode-locked operation. The MPC reduced the pulse repetition rate to the ~10 MHz level, scaling pulse energies and intensities. With only 540 mW of absorbed pump power, 98 fs pulses with energies of 9.9 nJ and peak powers of ~101 kW, corresponding to 95 mW of average power at a repetition rate of 9.58 MHz, were generated. By increasing the intracavity negative dispersion, 310 fs pulses with energies of 15.2 nJ and peak powers of ~49 kW, corresponding to 160 mW of average power at 10.51 MHz repletion rate, were also generated. These results demonstrate that low-cost MPC Cr[superscript 3+]-doped colquiriite lasers can generate pulse energies and intensities comparable to more expensive Ti:sapphire lasers.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
Optical Society of America
Umit Demirbas, Alphan Sennaroglu, Franz X. Kärtner, and James G. Fujimoto, "Generation of 15 nJ pulses from a highly efficient, low-cost multipass-cavity Cr3+:LiCAF laser," Opt. Lett. 34, 497-499 (2009) http://www.opticsinfobase.org/abstract.cfm?URI=ol-34-4-497
Author's final manuscript