Feng Suchun, Xu Ou, Lu Shaohua, Mao Xiangqiao, Ning Tigang, Jian Shuisheng
Institute of Lightwave Technology, Key Lab of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China.
Opt Express. 2008 Aug 4;16(16):11830-5. doi: 10.1364/oe.16.011830.
An improved erbium-doped fiber laser configuration for achieving single-polarization, switchable dual-wavelength of orthogonal polarizations oscillations at room temperature is proposed. For the first time, two fiber Bragg gratings (FBGs) directly written in a polarization-maintaining (PM) and photosensitive erbium-doped fiber (PMPEDF) as the wavelength-selective component are used in a linear laser cavity. Due to the polarization hole burning (PHB) enhanced by the polarization-maintaining FBG (PMFBG), the laser can be designed to operate in stable dual-wavelength or wavelength-switching modes with a wavelength spacing of 0.336 nm at room temperature by adjusting a polarization controller (PC). Each lasing line shows a single polarization with a polarization extinction ratio of >25 dB under different pump levels. The optical signal-to-noise ratio (OSNR) is greater than 50 dB. The amplitude variation with 16 times scans in nearly one and half an hour is less than 0.5 dB at both operating wavelength.
提出了一种改进的掺铒光纤激光器结构，用于在室温下实现单偏振、可切换的正交偏振振荡双波长。首次将直接写入保偏（PM）和光敏掺铒光纤（PMPEDF）中的两个光纤布拉格光栅（FBG）作为波长选择元件用于线性激光腔中。由于保偏光纤布拉格光栅（PMFBG）增强了偏振烧孔（PHB）效应，通过调整偏振控制器（PC），该激光器可设计为在室温下以0.336 nm的波长间隔在稳定双波长或波长切换模式下工作。在不同泵浦水平下，每条激光线都呈现单偏振，偏振消光比>25 dB。光信噪比（OSNR）大于50 dB。在两个工作波长下，近一个半小时内进行16次扫描时的幅度变化均小于0.5 dB。
