1 北京航天控制仪器研究所 国家惯性技术产品质检中心, 北京 100039
2 北京交通大学 理学院, 北京 100044
半导体光放大器(SOA)作为全光集成器件的核心, 在全光通信和光纤传感等领域中具有重要的应用前景。值得关注的是, 半导体光放大器的材料增益透明决定了它的快慢光过渡点和信号增益的起始点, 因此准确测量其材料增益透明对应的注入电流, 对于SOA的全面应用具有重要意义。提出了一种测量SOA材料增益透明电流的方法, 并深入分析了其特点。依据材料增益透明时SOA的输出功率与入射光偏振无关的特性, 实验测量了不同输入光功率条件下, 入射光偏振态对输出功率影响最小时, SOA的注入电流。利用上述方法, 准确地测量出给定波长输入待测SOA的增益透明电流为155mA。该方法为实现其他类型任意波长注入时SOA增益透明电流的测量提供了参考, 为其全面应用奠定了基础。
半导体光放大器 全光集成器件 材料增益透明 偏振态 semiconductor optical amplifiers all-optical integrated photonic devices material gain transparency polarization state
高速调制信号的慢光技术在未来高速光通信和光信号处理等领域具有重要的应用前景。基于光滤波法, 提出了半导体光放大器(SOA)与带通滤波器串联的结构, 实现了高速调制正弦信号和归零伪随机码（RZ-PRBS）脉冲信号动态可调时延的关键技术。对于正弦信号, 当调制频率为5 GHz信号光经过光滤波结构时, 改变SOA的注入电流, 能够实现40%和-10%的基频相对延时量; 对于RZ-PRBS光脉冲信号, 波长为1549.735 nm(1550.525 nm), 脉宽为100 ps的光脉冲信号入射滤波结构, 改变SOA的注入电流, 实现脉冲包络44.6 ps(96.3 ps)的可调延时。实验数据表明, 利用所提出的光滤波结构, 通过改变SOA的注入电流, 能够实现高速调制信号的可调延时。在精确控制SOA注入电流的情况下, 该光滤波结构可用于光通信中的信号同步和比特量级的信号处理。
非线性光学 半导体光放大器 快光 慢光 中国激光
2018, 45(10): 1006006
Author Affiliations
Abstract
1 National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China
2 Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education, Wuhan University of Technology, Wuhan 430070, China
A field-programmable gate array (FPGA)-based large-capacity sensing network with ultra-weak fiber Bragg gratings (FBGs) is proposed and experimentally studied. The demodulation system is constructed to interrogate 1642 serial time-division-multiplexing FBGs with a peak reflectivity of about 40 dB and equal separations of 2.5 m. Two semiconductor optical amplifiers and an InGaAs linear sensor array controlled by an FPGA are introduced to the demodulation system to achieve fast, precise, and flexible interrogation. The low crosstalk and spectral distortion are investigated through both theoretical analysis and experiments.
060.3735 Fiber Bragg gratings 250.5980 Semiconductor optical amplifiers 060.4230 Multiplexing Chinese Optics Letters
2016, 14(1): 010601
Author Affiliations
Abstract
Department of Signal Theory and Communications, Universitat Politècnica de Catalunya, Barcelona 08034, Spain
In this Letter, an efficient bidirectional differential phase-shift keying (DPSK)—DPSK transmission for a ultra-dense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit (ONU) is used both as the local laser for downlink coherent detection and the optical carrier for uplink. Phase-shift keying is generated using a low-cost reflective semiconductor optical amplifier (RSOA) at the ONU. The RSOA chip has the bandwidth of 4.7 GHz at the maximum input power and bias current. For uplink transmission, the sensitivity of the RSOA chip reaches 48.2 dBm at the level of bit error rate=10 3 for back-to-back, and the penalty for 50 km transmission is less than 1 dB when using polarization diversity.
060.1660 Coherent communications 250.5980 Semiconductor optical amplifiers 060.2330 Fiber optics communications 060.4250 Networks Chinese Optics Letters
2016, 14(5): 050605
Author Affiliations
Abstract
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China
Optical bistabilities have been considered to be useful for sensor applications. As a typical nonlinear device, Fabry-Perot semiconductor optical amplifiers (FPSOAs) exhibit bistability under certain conditions. In this paper, the bistable characteristics in FPSOAs are investigated theoretically. Based on Adams’s relationship between the incident optical intensity Iin and the z-independent average intracavity intensity Iav, an analytical expression of the bistable loop width in SOAs is derived. Numerical simulations confirm the accuracy of the analytical result.
Bistability Fabry-Perot resonator semiconductor optical amplifiers Photonic Sensors
2016, 6(3): 268
1 电子科技大学 物理电子学院, 成都 610054
2 海军装备部, 西安 710000
3 西北机电工程研究所, 陕西 咸阳 712099
从描述F-P型半导体光放大器（FPSOA）腔内光强Iav与输入光强Iin、输出光强Iout之间关系的方程组出发, 证明了Iin是Iav的单值函数。将Iin近似表示为Iav的三阶泰勒级数, 则Iin对Iav的导数可以表示为一个关于变量Iav的一元二次方程。进一步地, 从理论上论证了只有当该一元二次方程具有两个实数根时, FPSOA才处于双稳工作区。这样, FPSOA双稳现象的必要条件在数学上可以表示为该一元二次方程的判别式大于0。数值实验与解析结果吻合得很好。该研究结果对于具有类似结构器件的双稳现象研究具有一定的参考价值。
半导体光放大器 双稳 泰勒级数 semiconductor optical amplifiers bistability Taylor’s series
上海大学特种光纤与光接入网重点实验室， 上海 200072
对正交频分复用无源光网（OFDM-PON）的上行通道物理层的吞吐量进行研究。OFDM-PON在光网络单元（ONU）端采用反射式半导体光放大器（RSOA）作为无色光源，实现双边带光强度调制，并在光线路终端（OLT）采用加半导体光放大器（SOA）前置放大的PIN光二极管做直接检测。基于一个RSOA的窄带相干积分模型，采用对有源区中载流子速率方程和光波传播方程的微扰解对RSOA的动态电光调制特性和频率啁啾特性进行理论与实验探讨，证明RSOA具有低通调制特性，其3 dB截止频率关联于偏置电流和输入光功率。利用RSOA的频率啁啾和SOA的高通增益特性，并将RSOA与中心波长蓝移的光滤波器级联，实现光学均衡，把上行通道的3 dB截止频率从1.5 GHz扩展到2.2 GHz。进一步采用自适应比特加载的调制格式，使通过一个RSOA的上行数据吞吐量可以达到4 Gb/s以上，则一个包含10个ONU的OFDM-PON的上行吞吐量可达到40 Gb/s。
光通信 吞吐潜力 正交频分复用无源光网 无色光源 反射式半导体光放大器 光调制器
Author Affiliations
Abstract
Institute of Optical Information, Key Lab of Luminescence and Optical Information Technology, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
Based on the general mechanism of the coherent population oscillations, we propose the fundamental -harmonic fractional delay (FHFD) to evaluate the superluminal and slow light propagation in semiconductor optical amplifier (SOA). The sinusoidal and square-wave signals in SOA are investigated with the propagation equations. It is shown that the superluminal and slow light always accompany the signal distortion, and FHFD depends on the signal distortion as well as the incident power, the modulation frequency, and the optical gain.
190.4380 Nonlinear optics, four-wave mixing 250.5980 Semiconductor optical amplifiers 230.4320 Nonlinear optical devices Chinese Optics Letters
2015, 13(s1): S11902
Author Affiliations
Abstract
1 National Engineering Laboratory of Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China
2 China Three Gorges University, Yichang, 443002, China
An interrogation system based on two semiconductor optical amplifiers for weak fiber Bragg gratings (FBGs) was proposed. The first semiconductor optical amplifier (SOA) was used to modulate the light, and the second SOA separated the reflected signal from the different FBGs through delayed switching. The proposed system has lower insertion loss and higher spatial resolution, and can interrogate the time- and wavelength-division multiplexed FBG array. Up to 50 FBGs, with a reflectivity of 0.2% and a spatial resolution of 5 m along the optical fiber, were distinguished to demonstrate the interrogation system.
Fiber Bragg grating sensors time-division multiplexing semiconductor optical amplifiers interrogation Photonic Sensors
2014, 4(2): 168
新型的量子点光放大器以宽带宽、高增益、低噪声和高功率放大等优点而得到发展和应用。从量子点的结构和主要特性出发，概述了常用的几种量子点在光放大器方面的研究和应用状况。随后，介绍了量子点半导体光放大器和量子点光纤放大器的基本结构以及工作机理，简述了CdSe/ZnS量子点光纤的光谱特性，提出了进一步发展量子点光放大器有待解决的问题，展望了量子点在光通信领域的应用前景。
光学器件 量子点 半导体光放大器 光纤放大器 掺杂光纤 激光与光电子学进展
2013, 50(2): 020009
