El Bassri Farid, Doutre Florent, Mothe Nicolas, Jaffres Lionel, Pagnoux Dominique, Couderc Vincent, Jalocha Alain
Xlim Research Institute, University of Limoges, UMR CNRS 6172, Limoges, France.
Opt Express. 2012 Jan 16;20(2):1202-12. doi: 10.1364/OE.20.001202.
We present a novel broadband laser source based on a dual cavity in which a subnanosecond passively Q-switched microchip laser is coupled with a long cavity including an acousto-optic modulator (AOM) and a microstructured optical fiber working as a non linear medium. This active-passive Q-switched laser source emits pulses as short as those emitted by the free running microchip laser (~600 ps). The time pulse emission is governed by the AOM allowing tunable repetition rate from 0 to more than 4 kHz with a temporal jitter reduced to less than 50 ns, i.e. a 600-fold reduction compared to that of the free running microchip. Furthermore, thanks to spectral broadening in the microstructured fiber, this source emits a supercontinuum from 700 nm to 1700 nm.
我们展示了一种基于双腔的新型宽带激光源，其中一个亚纳秒被动调Q微芯片激光器与一个长腔耦合，该长腔包括一个声光调制器（AOM）和一根用作非线性介质的微结构光纤。这种主动-被动调Q激光源发射的脉冲与自由运行的微芯片激光器发射的脉冲一样短（约600皮秒）。时间脉冲发射由AOM控制，允许重复频率在0至4千赫兹以上可调，时间抖动降低到小于50纳秒，即与自由运行的微芯片相比降低了600倍。此外，由于微结构光纤中的光谱展宽，该源发射出从700纳米到1700纳米的超连续谱。
