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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...
A zero-index waveguide（图）
zero-index waveguide
2017/10/25
In 2015, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) developed the first on-chip metamaterial with a refractive index of zero, meaning that the phase o...
Break Up of N-Soliton Bound State in a Gradient Refractive Index Waveguide with Nonlocal Nonlinearity
N-Soliton Bound State GRIN Waveguide Nonlocal Nonlinearity Conserved Implicit Crank-Nicolson Method Inverse Scattering Technique
2013/1/30
We study the propagation of N-soliton bound state in a triangular gradient refractive index waveguide with nonlocal nonlinearity. The study is based on the direct numerical solutions of the model and ...
Extraordinarily high spectral sensitivity in refractive index sensors using multiple optical modes
Sensors Surface plasmons Resonators
2015/8/10
The extraordinary spectral sensitivity of surface plasmon resonance (SPR) sensors is commonly attributed to the modal overlap or unique dispersion of surface plasmons. In contrast to this belief, we s...
An HC-PCF Fluorescence Spectrocopy for Detection of Microsphere Samples Based on Refractive Index Scaling Law
Optical Fiber Hollow-Core Photonic Crystal Fiber Refractive Index Scaling Fluorescence Spectroscopy
2013/1/30
This paper illustrates an efficient fluorescence detection of micro particles using hollow-core photonic crystal fibers (HC-PCFs) by applying the refractive index (RI) scaling law. The variations in t...
High Refractive Index Bi2O3-B2O3-TeO2 Glass with High Visible-NIR Transmittance
Fiber materials Optical properties
2015/6/4
We have newly developed Bi 2 O 3 -B 2 O 3 -TeO 2 glass system. This glass shows high transmittance in visible and near-IR wavelength, in spite of their high refractive index and optical nonlinearity.
Fabrication and Demonstration of a Pure Silica-Core Waveguide Utilizing a Density-Based Index Contrast
Glass waveguides Thin-Films Other Properties
2015/5/26
We report a novel approach for creating a dopant-free pure silica-core waveguide(PSCW) for chip-scale waveguides with the goal of reaching fiber-like losses on-chip.Stoichiometric silica films were us...
10 Gbit/s Short-Reach Transmission over 35 m Large-Core Graded-Index Polymer Optical Fiber
Fiber optics communications Optical interconnects
2015/5/22
In the paper we demonstrate robust 10 Gbit/s short-reach transmission over 35 m of 1-mm core-diameter graded-index polymer optical fiber with very low cost components and DMT modulation. With this sch...
160-to-40Gibt/s Time Demultiplexing in a low dispersion Lead-Silicate W-Index Profile Fiber
Nonlinear optics Nonlinear optics four-wave mixing
2015/5/22
A 2.2m long sample of lead-silicate W-index profile fiber with nonlinear coefficient of 820W -1 km -1 and exhibiting low and flat dispersion across the C-band is used in an all-optical 160-to-40Gbit/s...
Recent Progress in Optical Fiber Refractive Index Profiling
Optical Fiber Refractive Index
2015/5/18
Recent optical fiber refractive index profile measurement advances include quantitative phase measurement, multi-wavelength spectroscopy, and computerized tomography. These new techniques, and their a...
Design and Implementation of An Index-based Parallel Scheduler for Optical Burst Switching Networks
Optical Burst Switching Networks Index-based Parallel Scheduler
2015/5/15
A fast and easy to implement index-based parallel burst scheduler for OBS network is proposed. A 16-channel scheduler with scheduling time of 33.3ns per burst request is demonstrated in FPGA.
A Study on Refractive Index Changes Induced by Heating the Long-Period Fiber Gratings in Different Temperatures
Refractive Index Different Temperatures ong-Period Fiber Gratings
2015/5/15
A silica fiber and long-period gratings were heated to clarify the effect of the glass structure and the residual stress relaxations on the fiber index profile and resonance wavelengths.The profile ch...
Refractive index profiles of planar waveguides produced in electrodiffusion processes
planar waveguides field-assisted ion-exchange
2011/4/26
The paper presents the results of investigation which demonstrate the possibilities to shape refractive index profiles of planar waveguides produced in glass using the ion exchange technique with the ...
Refractive-index sensor based on tilted fiber bragg grating interacting with multimode fiber.
optical fiber sensors tilted fiber Bragg gratings refractive index measurement
2013/5/27
A simple refractive-index fiber sensor based on a tilted Bragg fiber grating (TFBG) interacting with multimode fiber (MMF) is described. The sensor structure is formed by insertion of a small section ...
First Demonstration of Bidirectional Gigabit Transmission over a Single Step-Index Plastic Optical Fibre
Fiber optics communications Optical Communications
2015/6/9
We demonstrated a Gigabit Ethernet bidirectional transmission over a single POF. The solution is attractive for very low cost consumer electronic short-distance cabling at high data rate requiring ext...