Abstract
High-peak-power modelocked lasers are required for nonlinear microscopy of biological samples in order to generate high signal intensities whilst minimising the introduction of heat. Modelocked semiconductor disk lasers (SDLs) can offer a solution that is compact and low cost due to scalable wafer growth and the use of low-cost diode lasers as a pump. Modelocking SDLs with a sub-GHz repetition rate is a challenge due to the short lifetime of the carriers (typically a few nanoseconds) and nonlinear effects in the gain region. A low repetition rate of around 100 MHz is specifically required for many nonlinear microscopy applications and this is hard to achieve efficiently without operating in harmonically-modelocked or multiple-pulsing regimes.
© 2015 IEEE
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