第 43 卷 第 1 期
2016 年 1 月
Vol. 43, No. 1
January, 2016
中 国 激 光
CHINESE JOURNAL OF LASERS
0102002-
Single-Polarization, Single-Longitudinal-Mode Erbium-Doped Fiber
Laser Based on Twisting of Polarization-Maintaining Fiber Bragg Gratings
Feng Suchun Peng Jian Peng Wanjing Fan Yiyi Xie Qian Ren Wenhua
Institute of Lightwave Technology, Key Laboratory of All Optical Network and Advanced Telecommunication of
Education Ministry of China, Beijing Jiaotong University, Beijing 100044, China
Abstract Single-polarization, single-longitudinal-mode (SLM) erbium-doped fiber laser based on the twisting
of polarization-maintaining fiber Bragg gratings (PMFBGs) is proposed and demonstrated. Two uniform FBGs
directly written in a homemade polarization-maintaining and photosensitive erbium-doped fiber (PMPEDF) without
hydrogen loading by using ultraviolet light from a 248 nm KrF excimer laser as the wavelength-selective component
are used in a linear cavity. Owing to the polarization-dependent loss enhanced by the PMFBGs, stable SLM and
stable single- polarization operation of the fiber laser are achieved by controlling the birefringence through
appropriately twisting the fiber laser cavity.
Key words lasers; single polarization; single longitudinal mode; fiber laser; polarization-maintaining fiber Bragg
gratings
OCIS codes 060.2320; 060.2410; 060.2420; 060.3510; 060.3738
基于扭绞保偏光纤光栅的单纵模单偏振掺铒
光纤激光器
冯素春 彭 健 彭万敬 范依依 谢 倩 任文华
北京交通大学光波技术研究所, 全光网络与现代通信网教育部重点实验室, 北京 100044
摘要 提出并实现了一种基于扭绞保偏光纤光栅的单纵模单偏振掺铒光纤激光器。光纤激光器的线型激光谐振腔
由两个均匀保偏光纤光栅构成并作为激射波长和纵模模式选择器件,均匀保偏光纤光栅采用 248 nm KrF 准分子激
光直接刻写在不需要氢载的自制保偏光敏掺铒光纤上。利用保偏光纤光栅引起的偏振依赖损耗效应,通过对光纤
激光器谐振腔进行适当扭绞,成功实现了稳定输出的单纵模单偏振掺铒光纤激光器。
关键词 激光器; 掺铒光纤激光器; 单纵模; 单偏振; 保偏光纤光栅
中图分类号 TN248.1 文献标识码 A
doi: 10.3788/CJL201643.0102002
1 Introduction
Single-longitudinal-mode (SLM) erbium-doped fiber (EDF) lasers are key devices for many applications, including
distributed long-distance optical-fiber sensor systems, coherent optical communication, and coherent signal generation,
owing to their various advantages, such as reduced production costs and perfect integration with fiber-optics-based
systems
[1-3]
. Among the SLM technologies in fiber lasers, the short-linear-cavity structure is the simplest, and it makes
the laser compact. Fiber Bragg gratings (FBGs) are good candidates for lasing- mode discrimination owing to their
advantages such as low insertion loss, ease of use and fabrication, low cost, passiveness, and wavelength selectivity. In
收稿日期: 2015-05-10; 收到修改稿日期: 2015-07-20
基金 项 目: 国 家 973 计 划 (2010CB328206),国家自 然 科 学 基金(61107094),中央高校基本科研 业 务 费 (2013JBM017),北京交
通大学青年英才计划
作者简介: 冯素春(1982—),男,博士,副教授,主要从事光纤通信、光纤激光器方面的研究。E-mail: fengsuchun@gmail.com
*通信联系人。E-mail: fengsuchun@gmail.com
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