Opt Express. 2023 Feb 13;31(4):6796-6804. doi: 10.1364/OE.476711.
We present a new saturable absorber device principle which has the potential for broad spectral range applications. An active region membrane is separated from the substrate and placed on a dielectric end mirror. By combining the absorbing membrane with the dielectric mirror to one device we get a membrane saturable absorber mirror (MESAM) which is similar to the well-known semiconductor saturable absorber mirror (SESAM) without the restriction of the stop-band reflectivity of the distributed Bragg reflector (DBR). Stable mode-locking with the MESAM was achieved in a red-emitting VECSEL at a pump power of 4.25 W with a pulse duration of 3.06 ps at 812 MHz repetition rate. We compare the performance and pulses of both SESAM and MESAM in a z-shaped VECSEL cavity.
我们提出了一种新的可饱和吸收体器件原理，该原理具有广泛的光谱应用潜力。有源区膜与衬底分离并放置在介电端镜上。通过将吸收膜与介电镜组合成一个器件，我们得到了一个类似于众所周知的半导体可饱和吸收镜（SESAM）的膜可饱和吸收镜（MESAM），而没有分布式布拉格反射器（DBR）的截止带反射率的限制。在泵浦功率为 4.25 W 的红色发射 VECSEL 中，通过 812 MHz 重复率实现了稳定的模式锁定，脉冲持续时间为 3.06 ps。我们在 Z 形 VECSEL 腔中比较了 SESAM 和 MESAM 的性能和脉冲。
