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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...
High refractive index substrates for fluorescence microscopy of biological interfaces with high z contrast
Oxides Niobium Silicon Dioxide Xanthenes Lipid Bilayers Phosphatidylcholines Phosphatidylethanolamines Fluorescent Dyes Microscopy, Fluorescence Image Enhancement
2016/5/23
Total internal reflection fluorescence microscopy is widely used to confine the excitation of a complex fluorescent sample very close to the material on which it is supported. By working with high ref...
On the Refractive Index Correction In Luminescence Spectroscopy
Refractive Index Correction Luminescence Spectroscopy
2016/5/20
On the Refractive Index Correction In Luminescence Spectroscopy.
The Effects of Refractive Index Mismatch on Multiphoton Fluorescence Excitation Microscopy of Biological Tissue
scattering spherical aberration refractive index mismatch two-photon microscopy multiphoton fluorescence excitation microscopy
2015/5/21
Introduction: Multiphoton fluorescence excitation microscopy (MPM) is an invaluable tool for studying processes in tissue in live animals by enabling biologists to view tissues up to hundreds of micro...
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 ...
Spectroscopic measurement of the refractive index of ion-implanted diamond
Spectroscopic measurement refractive index ion-implanted diamond
2012/2/24
We present the results of variable-angle spectroscopic ellipsometry and transmittance measurements to determine the variation of the complex refractive index of ion implanted single-crystal diamond. A...
Low-loss amorphous Si waveguides with gradient refractive index cladding structure
Low-loss amorphous waveguides gradient refractive index cladding structure
2013/7/3
Amorphous Si waveguides with gradient refractive index cladding structure are proposed and fabricated using plasma-enhanced chemical vapor deposition method. Compared with 6 dB/cm for ridge waveguide ...
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...
The enclosure method for inverse obstacle scattering problems with dynamical data over a finite time interval II. Obstacles with a dissipative boundary or finite refractive index and back-scattering data
enclosure method inverse obstacle scattering problem inverse backscattering obstacle wave equation dissipative boundary condition
2011/9/5
Abstract: In this paper a wave is generated by an initial data whose support is localized at the outside of unknown obstacles and observed in a limited time on a known closed surface or the same posit...
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...
Solitons in thermal media with periodic modulation of linear refractive index
thermal media periodic modulation linear refractive index
2011/9/6
We address the existence and the properties of solitons in thermal media with periodic distribution of two different linear refractive indices. Many kinds of
solitons in such optical lattices, includ...
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.
Analytic evaluation of diffuse flux at a refractive index discontinuity in forward-biased scattering media
Analytic evaluation forward-biased scattering media
2011/8/26
A simple analytic method of estimating the error involved in using an approximate boundary condition for diffuse radiation in two adjoining scattering media with differing refractive index is presente...
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...
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...