非厄米锁模在L波段单片InP双环激光器中的应用

中文摘要 AI 辅助

激光腔之间的耦合提供了一种通过增益、损耗和杂化来控制光学模式的手段。在此，我们展示了一种在L波段工作的单片InP双环激光器中，无需专用可饱和吸收体即可实现电控锁模。对两个环的独立偏置可访问单模发射、锁模和杂化超模操作，后者测得的模间拍频为542 MHz。该激光器在18.11 GHz频率下产生7.9 ps脉冲。耦合腔模型描述了差分非线性失谐如何改变模态增益损耗对比度，时域模拟得到的脉冲宽度和光谱宽度与实验测量值接近。在包含可饱和吸收体的器件中，反向偏置可实现3.1 ps脉冲，并将积分定时抖动从9.06 ps降至2.46 ps（相对于无偏置条件）。这些结果将耦合腔态的电控与单片InP半导体平台中的皮秒脉冲产生联系起来，适用于高重复率光通信和微波光子学。

英文摘要

Coupling between laser cavities provides a means of controlling optical modes through their gain, loss, and hybridization. Here we demonstrate electrically controlled mode locking in a monolithic InP dual ring laser operating in the L band without a dedicated saturable absorber. Independent biasing of the two rings accesses single mode emission, mode locking, and hybridized supermode operation, with a measured intermode beat frequency of 542 MHz in the latter regime. The laser generates 7.9 ps pulses at 18.11 GHz. A coupled cavity model describes how differential nonlinear detuning modifies the modal gain loss contrast, and time domain simulations yield pulse durations and spectral widths close to those measured experimentally. In a device incorporating saturable absorbers, reverse bias enables 3.1 ps pulses and reduces the integrated timing jitter from 9.06 to 2.46 ps relative to the unbiased condition. These results connect electrical control of coupled-cavity states with picosecond pulse generation in a monolithic InP semiconductor platform for high repetition rate optical communications and microwave photonics.

发表机构

• James Watt School of Engineering, University of Glasgow（格拉斯哥大学詹姆斯·瓦特工程学院）

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