Subpicosecond pulses have been generated in an actively modelocked, polarisation-maintaining Er-doped fibre ring laser. A single-polarisation fibre amplifier and an uncompensated polarisation bias section are integrated into the laser. This laser combines the nonlinear pulse-shortening mechanism of polarisation-rotation lasers and the single-polarisation operation, environmental insensitivity, and capacity for active modelocking characteristic of unidirectional single-polarisation ring lasers.

T. F. Carruthers

I. N. Duling

M. L. Dennis

Electronics Letters

ELECTRONICS LETTERS 是国际知名的同行评审快速传播期刊，每两周发表一次简短的原创研究论文。其广泛的跨学科范围涵盖了所有电子工程相关领域的最新发展，包括通信、生物医学、光学和设备技术。 ELECTRONICS LETTERS 还通过特刊和采访进一步深入了解一些最新发展。SCOPEAS 处于该领域最前沿的期刊，ELECTRONICS LETTERS 发表的论文涵盖电子和电气工程的所有主题。该期刊的主要主题如下：天线和传播生物医学和仿生技术、信号处理和应用控制工程电磁学：理论、材料和器件电子电路和系统图像、视频和视觉处理和应用信息、计算和通信仪器和测量微波技术光学通信光子学和光电功率电子、能源和可持续发展雷达、声纳和导航半导体技术信号处理MIMO

Electronics Letters is a well-known international peer-reviewed rapid publication journal that publishes concise original research papers every two weeks. It covers the latest developments across all areas of electronic engineering, including communications, biomedical, optics, and device technology. The journal further explores some of the latest advancements through special issues and interviews. As one of the leading journals in the field, Electronics Letters publishes papers on all topics related to electronic and electrical engineering. The main topics include: antennas and propagation, biomedical and bionic technologies, signal processing and applications, control engineering, electromagnetics (theory, materials, and devices), electronic circuits and systems, image, video and visual processing and applications, information, computing and communications, instrumentation and measurement, microwave technology, optical communications, photonics and optoelectronics, power electronics, energy and sustainability, radar, sonar and navigation, semiconductor technology, signal processing, and MIMO.

《Electronics Letters》是国际知名的同行评审快速传播期刊，每两周发表一次简短的原创研究论文。期刊涵盖了电子工程相关领域的最新发展，包括通信、生物医学、光学和设备技术。通过特刊和采访，期刊进一步深入探讨一些最新发展。《Electronics Letters》是该领域最前沿的期刊，发表的论文涉及电子和电气工程的所有主题。主要主题包括：天线与传播、生物医学与仿生技术、信号处理与应用、控制工程、电磁学（理论、材料与器件）、电子电路与系统、图像、视频与视觉处理与应用、信息、计算与通信、仪器与测量、微波技术、光学通信、光子学与光电、功率电子、能源与可持续发展、雷达、声纳与导航、半导体技术、信号处理和MIMO。

Category	Quartile
工程技术	4
工程技术, 工程电子与电气	4

Active-passive modelocking in a single-polarisation erbium fibre laser

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Category	Quartile
ENGINEERING, ELECTRICAL & ELECTRONIC	4