搜索结果: 1-15 共查到“光学工程 DFB”相关记录30条 . 查询时间(0.272 秒)
分布反馈（DFB）激光器具有结构紧凑、动态单模等特性，是高速光通信、大规模光子集成、激光雷达和微波光子学等应用的核心光源。特别是，以ChatGPT为代表的人工智能领域呈现爆发态势，亟需高算力、高集成、低功耗的光计算芯片作为物理支撑，对核心光源的温度稳定性、高温工作特性、光反馈稳定性、单模质量、体积成本等提出了更高要求。
采用相移光栅制作技术，在泵浦光激励下可实现kHz量级线宽的高相干激光输出，基于波分复用技术可以实现多波长窄线宽光纤激光光源阵列，可用于高性能传感的激光光源。同时可作为核心传感元件，经封装形成各种高灵敏光纤激光传感器，比如光纤水听器，光纤加速度计，光纤磁力计等，在水下目标监测、声发射监测和油气勘探等领域有着广泛应用。
2018年4月30日，我校电子与信息工程学院、光电材料与技术国家重点实验室余思远研究团队与英国伦敦大学学院(UCL)研究者合作在美国光学学会（OSA）旗舰刊物《Optica》上发表了硅基半导体激光器研究最新成果【Optica 5, 528 (2018)】。论文题为‘Monolithic quantum-dot distributed feedback laser array on silicon’...
由于驱动电流波动会影响分布式反馈式（DFB）激光器激射波长及发光功率，采用数模混合双闭环技术，以TMS320LF28335为核心控制器，设计并研制了一种高稳定性DFB激光器驱动电源。在硬件电路设计方面，该激光器驱动电源采用运算放大器深度负反馈原理，提高了系统的稳定性（优于4×10-5）。软件设计中，引入Ziegler-Nichols PID算法，消除了实际驱动电流值与理论值之间的微小差异（小于0....
由于分布反馈式(DFB)激光器输出光功率受其激射电流的影响,为了保证其稳定的光功率输出,研制了基于位移式数字PID算法的高稳定性DFB激光器驱动电源。在硬件设计方面,该驱动电源主要由控制器模块、恒流源模块和保护电路模块组成。采用模拟PI深度负反馈环节有效地提高了驱动电流的稳定性。在软件方面,采用位置式数字PID算法,消除了实际驱动电流值与理论值之间的微小差异。利用该驱动电源,对中心波长为1 563...
针对时分复用光纤光栅（TDM-FBG）传感阵列中使用的分布反馈（DFB）激光器高波长稳定度的要求，设计了一个高精度的DFB温控方案，包括温度测量与设定、热敏电阻线性化、PID补偿回路、H桥驱动、温度电压采集与显示等。使用DFB内置的热敏电阻和半导体制冷器（TEC）对温控电路进行了测试，其精度在200s内达到±0.04℃，温控后激光器温度变化引起的应变测量误差为±3.4με左右，满足TDM-FBG传...
Single-mode 1.52 μm InAs/InP quantum dot DFB lasers
Quantum devices Lasers distributed-feedback
2015/5/25
Single-mode InAs/InP quantum dot DFB lasers with side-mode suppression ratio greater than 62 dB are demonstrated, operating CW up to 80°C. Relative intensity noise was less than -153 dB/Hz from 1 MHz ...
40-Gbps Direct Modulation of 1.3-μ μm InGaAlAs DFB Laser in Compact TO-CAN Package
Semiconductor laser Integrated optics devices
2015/5/25
We developed a compact TO-CAN module with a 1.3-μm InGaAlAs directly-modulated laser. We achieved a record relaxation oscillation frequency slope value of 4.85 GHz/mA 1/2 and a 40-Gbps modulated trans...
40G RZ-DQPSK Transmitter Monolithically Integrated with Tunable DFB Laser Array and Mach-Zehnder Modulators
40G RZ-DQPSK Transmitter Monolithically Integrated Tunable DFB Laser Array Mach-Zehnder Modulators
2015/5/20
A 40G RZ-DQPSK transmitter monolithically integrated with a tunable DFB laser array and Mach-Zehnder modulators was developed for the first time. The optical waveform of 40Gb/s DQPSK was successfully ...
10.3-Gb/s Operation over a Wide Temperature Range in 1.3-μm Quantum-dot DFB Lasers with High Modal Gain
Lasers distributed-feedback Quantum dot devices
2015/6/8
Temperature-stable 10.3-Gb/s operation was attained for 1.3-μm quantum-dot DFB lasers with high modal gain. Clearly-opened eye diagrams with the extinction ratio of over 5.2 dB were obtained from -40o...
Simultaneous ER Enhancement and Frequency Stabilization Scheme for Directly Modulated DFB Lasers
Fiber optics communications Fiber optics links subsystems
2015/6/4
A simultaneous extinction-ratio enhancement and frequency stabilization scheme is proposed for directly modulated DFB lasers at the optical line terminal to enhance signal quality and to stabilize opt...
光纤型外部光反馈DFB激光器的非线性动力学特性的实验研究
非线性动力学 混沌 DFB激光器 光纤型外腔光反馈 混沌 DFB激光器 光纤型外腔光反馈 Nonlinear dynamics Chaos DFB Semiconductor laser Fiber external cavity optical feedback
2009/9/17
实验研究了光纤型外腔反馈作用下DFB激光器的各种非线性动力学行为。通过分析DFB激光器的输出光谱、频谱以及时间序列，单周期、多周期以及混沌等多种典型的非线性动力学行为被直接观察到。在一定的反馈强度范围内，随着反馈强度的增大，非线性动力学行为的周期性逐渐减弱，而复杂性不断增强，最终进入频率连续覆盖范围很广的宽谱混沌动力学区域。实验还发现，在连续谱背景上存在多个特征频率峰，这些特征频率的位置不随反馈光...
Continuous wave terahertz spectrometer based on two DFB laser diodesbased on two DFB laser diodes
terahertz continuous wave spectroscopy Bragg structure
2011/5/6
In this paper, a continuous wave (cw) spectrometer in the far infrared range is presented.
Electromagnetic radiation is generated via photomixing phenomena and covers frequencies
between about 50 GH...
First 40-km SMF Transmission for 100-Gbit/s Ethernet System Based on 25-Gbit/s 1.3-m Electroabsorption Modulator Integrated with a DFB Laser Module
Transmission Ethernet System Electroabsorption Modulator Integrated DFB Laser Module
2015/7/16
High-performance 1.3- m InGaAlAs electroabsorption modulator integrated with DFB laser module for metro-area 100-Gbi/s Ethernet system (100GBASE-ER4) has been realized. Long-reach (40 km) err...
95 ˚C Uncooled and High Power 25-Gbps Direct Modulation of InGaAlAs Ridge Waveguide DFB Laser
95 ˚ C Uncooled Direct Modulation Waveguide DFB Laser
2015/7/16
95˚C, 25-Gbps direct modulation of a high-power (>15mW) 1.3-μm-InGaAlAs-DFB laser is developed for the first time. The device will be a key for 4-channel CWDM uncooled light-sources used in the l...