We present a monolithically integrated mode-locked laser (MLL) with 25 GHz fundamental repetition rate frequency, which has been designed to operate in a fourth-order colliding regime, to generate 100 GHz. This device has been fabricated within a multi-project wafer (MPW) run in an InP-based active-passive generic foundry. The Fabry-Perot laser resonator, of around 1.66 mm length, is defined by two on-chip reflectors, eliminating the need of cleaved facet. Three saturable absorber sections are symmetrically located by spacing them a quarter of this total length, dividing the cavity into four gain segments. We show that this structure can generate an electrical beat note at 25 GHz as well as 100 GHz, with a linewidth of 350 kHz and 150 kHz, respectively, operating in passive operation regime.

中文翻译：

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100 GHz 多重碰撞脉冲产生自解理无小面多节半导体激光二极管

我们提出了一种具有 25 GHz 基本重复频率的单片集成锁模激光器 (MLL)，其设计用于在四阶碰撞机制中运行，以产生 100 GHz。该器件是在基于 InP 的有源-无源通用代工厂中运行的多项目晶圆 (MPW) 中制造的。长度约为 1.66 毫米的 Fabry-Perot 激光谐振腔由两个片上反射器定义，无需解理面。三个可饱和吸收器部分对称放置，将它们间隔为总长度的四分之一，将腔体分为四个增益段。我们表明，这种结构可以在 25 GHz 和 100 GHz 下产生电拍音，线宽分别为 350 kHz 和 150 kHz，在被动工作状态下运行。