基于平面光波电路的可饱和吸收体锁模的300兆赫兹重复频率全光纤飞秒激光器

300-MHz-repetition-rate, all-fiber, femtosecond laser mode-locked by planar lightwave circuit-based saturable absorber.

作者信息

Kim Chur, Kim Dohyun, Cheong YeonJoon, Kwon Dohyeon, Choi Sun Young, Jeong Hwanseong, Cha Sang Jun, Lee Jeong-Woo, Yeom Dong-Il, Rotermund Fabian, Kim Jungwon

出版信息

Opt Express. 2015 Oct 5;23(20):26234-42. doi: 10.1364/OE.23.026234.

DOI:10.1364/OE.23.026234

PMID:26480136

Abstract

We show the implementation of fiber-pigtailed, evanescent-field-interacting, single-walled carbon nanotube (CNT)-based saturable absorbers (SAs) using standard planar lightwave circuit (PLC) fabrication processes. The implemented PLC-CNT-SA device is employed to realize self-starting, high-repetition-rate, all-fiber ring oscillators at telecommunication wavelength. We demonstrate all-fiber Er ring lasers operating at 303-MHz (soliton regime) and 274-MHz (stretched-pulse regime) repetition-rates. The 303-MHz (274-MHz) laser centered at 1555 nm (1550 nm) provides 7.5 nm (19 nm) spectral bandwidth. After extra-cavity amplilfication, the amplified pulse train of the 303-MHz (274-MHz) laser delivers 209 fs (178 fs) pulses. To our knowledge, this corresponds to the highest repetition-rates achieved for femtosecond lasers employing evanescent-field-interacting SAs. The demonstrated SA fabrication method, which is based on well-established PLC processes, also shows a potential way for mass-producible and lower-cost waveguide-type SA devices suitable for all-fiber and waveguide lasers.

摘要

我们展示了使用标准平面光波电路（PLC）制造工艺实现的基于光纤尾纤、倏逝场相互作用的单壁碳纳米管（CNT）饱和吸收体（SA）。所实现的PLC-CNT-SA器件用于在电信波长下实现自启动、高重复率的全光纤环形振荡器。我们演示了在303 MHz（孤子 regime）和274 MHz（拉伸脉冲 regime）重复率下工作的全光纤铒环形激光器。以1555 nm（1550 nm）为中心的303 MHz（274 MHz）激光器提供7.5 nm（19 nm）的光谱带宽。经过腔外放大后，303 MHz（274 MHz）激光器的放大脉冲序列产生209 fs（178 fs）的脉冲。据我们所知，这对应于采用倏逝场相互作用SA的飞秒激光器所实现的最高重复率。所展示的基于成熟PLC工艺的SA制造方法，也为适用于全光纤和波导激光器的可批量生产且低成本的波导型SA器件提供了一条潜在途径。