来自半导体盘激光器的紧密锁定光学频率梳。

Tightly locked optical frequency comb from a semiconductor disk laser.

作者信息

Waldburger D, Mayer A S, Alfieri C G E, Nürnberg J, Johnson A R, Ji X, Klenner A, Okawachi Y, Lipson M, Gaeta A L, Keller U

出版信息

Opt Express. 2019 Feb 4;27(3):1786-1797. doi: 10.1364/OE.27.001786.

DOI:10.1364/OE.27.001786

PMID:30732226

Abstract

Ultrafast semiconductor disk lasers (SDLs) passively modelocked using semiconductor saturable absorbers mirrors (SESAMs) generate optical frequency combs (OFCs) with gigahertz line spacings - a regime where solid-state and fiber lasers struggle with geometrical and Q-switching limitations. We stabilized both the frequency comb spacing and the offset without any additional external optical amplification or pulse compression. The overall noise performance is competitive with other gigahertz OFCs. A SESAM-modelocked vertical external-cavity surface-emitting laser (VECSEL) at a center wavelength around 1 µm generates 122-fs pulses with 160 mW average output power and we only needed 17-pJ pulse energy coupled into a silicon nitride (SiN) waveguide for supercontinuum generation (SCG) and OFC offset stabilization.

摘要

使用半导体可饱和吸收镜（SESAM）进行被动锁模的超快半导体盘激光器（SDL）产生具有千兆赫兹线间距的光学频率梳（OFC）——在这一领域，固态激光器和光纤激光器受限于几何结构和调Q限制而举步维艰。我们在没有任何额外外部光放大或脉冲压缩的情况下，稳定了频率梳间距和偏移量。整体噪声性能与其他千兆赫兹OFC具有竞争力。中心波长约为1 µm的SESAM锁模垂直外腔面发射激光器（VECSEL）产生平均输出功率为160 mW的122飞秒脉冲，而我们仅需将17皮焦的脉冲能量耦合到氮化硅（SiN）波导中，即可实现超连续谱产生（SCG）和OFC偏移稳定。