搜索结果: 1-15 共查到“光电子技术 Raman”相关记录34条 . 查询时间(0.093 秒)
光电信息大讲堂第210期：From discovery of random Raman lasing via natural Rayleigh scattering in ultra-long fibers to unique lasing and sensing features of multimode and multicore fibers with fs-inscribed regular and random 3D refractive-index structures
拉曼光纤激光器 输出光束 折射率光纤
2023/4/17
在二极管泵浦的拉曼光纤激光器的多模渐变折射率光纤中，通过飞秒脉冲刻写FBG，可产生接近衍射极限的输出光束。这一技术已经应用于工业（通信、生物医学、材料加工、基础设施和能源行业）中的各种激光和传感器系统。从超长光纤自然瑞利散射引起的随机拉曼激光的发现出发，主讲人将介绍使用fs脉冲刻写具有规则/随机的3D折射率结构的多模、多芯光纤的技术，以及新型光纤所具有的独特激光和传感性能，这种新型光纤有望在物理上...
KTP晶体的激光烧蚀特性及Raman光谱研究
KTP晶体 激光烧蚀 激光等离子体 Raman光谱
2012/8/17
高阈值的KTP晶体的研发，对高能激光领域至关重要。采用高重复频率的紫外激光对KTP进行烧蚀，并对烧蚀前后的Raman光谱进行分析，研究发现：激光等离子体效应是造成晶体破坏的主要原因，其逆韧致吸收效应会大大增加激光脉冲能量的沉积，电离效应使得晶体发生充分的离解，高压冲击波效应则把熔化、气化以及电离混合物外排的同时，使得材料发生断裂。烧蚀前后的Raman光谱的特征峰分布基本相同，说明烧蚀作用没有改变K...
Comparison of Optical Fiber Types for All-Raman Systems
Fiber optics communications Fiber optics links subsystems
2015/5/25
We experimentally explore several optical fibers for all-Raman systems. We find that while NZ-DSF with small A eff may require slightly smaller pump power, its OSNR disadvantage is approximately 5 dB ...
High-Density Periodic Arrays of Self-Aligned Subwavelength Nanopyramids for Surface-Enhanced Raman Spectroscopy
High-Density Periodic Self-Aligned Subwavelength Nanopyramids Surface-Enhanced Raman Spectroscopy
2016/12/2
Novel nanotextured surfaces are presented with periodically self-aligned subwavelength nanogroove and nanopyramid structures with precisely defined pitch λg that are closely packed with 2 nm separatio...
Raman Extended GPON using 1240 nm Semiconductor Quantum-Dot Lasers
Fiber optics communications Fiber optics links subsystems
2015/6/9
We present an experimental demonstration of GPON reach extension to 50 km with a 32-way PON split using Raman amplification of the upstream signal with 1240 nm quantum-dot pump lasers.
Enhanced distributed hybrid sensor based on Brillouin and Raman scattering combining Fabry-Perot lasers and optical pulse coding
Fiber optics sensors Scattering Brillouin Scattering Raman
2015/6/8
Pulse coding techniques are proposed in combination with the use of Fabry-Perot lasers for simultaneous strain and temperature sensing based on hybrid spontaneous Raman-Brillouin scattering.Combinatio...
Economic Study Comparing Raman Extended GPON and Mid-span GPON Reach Extenders
Fiber optics communications Fiber optics links subsystems
2015/6/4
We present an operational and capital cost study comparing newly proposed Raman amplified GPON systems with standardized, commercially available, mid-span GPON reach extenders.
Overcoming gain-bandwidth product constraint in slow light Raman amplification with the use of light-stopping schemes
Overcoming gain-bandwidth product constraint slow light Raman cation
2015/8/10
We show that a light-stopping system with Raman amplification can overcome the gain-bandwidth constraint of slow light Raman amplification systems. The gain scales linearly with the time t...
Compact and Portable Multiline UV & Visible Raman Laser in Hydrogen-filled HC-PCF
Visible Raman Hydrogen-filled HC-PCF
2015/7/20
We present a very compact multi-line Raman-laser with broad spectral coverage from near-IR through to the much sought after yellow, deep blue and UV. Each line of the laser exhibits high power density...
Long Reach and Enhanced Power Budget DWDM Radio-over-Fibre Link Supported by Raman Amplification and Coherent Detection
Enhanced Power Budget DWDM Radio-over-Fibre Link Supported Raman Amplification
2015/7/17
We report on a scalable and enhanced power budget radio-over-fibre system for hybrid-wireless access networks operating at 12.5 GHz DWDM spacing for 5 GHz RF carriers over a 60 km fibre link with Rama...
Widely Wavelength Flexible Operation of All-Optical Regeneration in RZ-OOK Signals Using Gain-Band Tunable Raman Amplifier
Widely Wavelength All-Optical Regeneration RZ-OOK Signals Tunable Raman Amplifier
2015/7/17
We demonstrate operating wavelength flexible all-optical signal regeneration with 80 nm wavelength range by simply controlling the pump wavelength of Raman amplifier and the passband of broadened sign...
GPON reach extension to 60 km with entirely passive fibre plant using Raman amplification
GPON reach extension passive fibre plant Raman amplification
2015/7/16
We describe a purely-passive GPON compatible reach extender using distributed Raman amplification.Operation over 60 km of AllWave fibre at 2.5 Gbit/s is demonstrated with a total loss budget of 43 dB ...
Novel Design of Very Long, High Capacity Unrepeatered Raman Links
Novel Design High Capacity Unrepeatered Raman Links
2015/7/16
An L-band Raman link concept is analyzed numerically and validated experimentally by transmission of link designs in a number of methods: fiber. The individual pumps were optimized 10×43 Gb/s DPSK ch...
All-Optical 3R Regeneration at 40 Gb/s in a Recirculating Loop Utilizing Raman Amplification, Nonlinear Phase Modulation, and Offset Filtering
All-Optical 3R Regeneration Recirculating Loop Utilizing Raman Amplification Nonlinear Phase Modulation Offset Filtering
2015/7/15
The performance of an all-optical 3R regenerator for 40 Gb/s RZ-OOK signals is investigated experimentally using a recirculating loop. A power penalty of 1.2 dB is obtained for 100 loops (8,000 km).
Laser Pulse Compression and Amplification by Stimulated Backward Raman Scattering of Ba(NO3)2 and CaCO3 Crystals
Laser pulse compression Stimulated backward Raman scattering Short pulse laser
2009/6/15
Pulse compressor and amplifier using stimulated backward Raman scattering (SRS) of barium nitrate and calcite crystals are studied experimentally. 15 times of compression and more than 50 % SRS reflec...