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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...
Scan registration using planar features
Registration Laser scanning Point cloud Segmentation
2014/7/30
Point cloud acquisition by using laser scanners provides an efficient way for 3D as-built modelling of indoor/outdoor urban environments. In the case of large structures, multiple scans may be require...
Photoluminescence features of AgBr nanoparticles formed in porous glass matrices
porous glasses silver bromide nanoparticles luminescence properties quantum confinement
2011/5/6
The photoluminescence of AgBr nanoparticles formed by a two stage liquid-gas microsynthesis
technology in two types of porous glass with different sizes of pores was investigated. Polyvinyl
alcohol ...
Universal features of coherent photonic thermal conductance in multilayer photonic band gap structures
Universal features photonic thermal conductance multilayer photonic band gap structures
2015/8/10
We show that at the high-temperature limit, the coherent photonic thermal conductance of a multilayer photonic crystal can be significantly below the corresponding thermal conductance of vacuum....
Photonic Crystal Waveguide Weakly Interacting with Multiple Off-Channel Resonant Features Formed of Kerr Nonlinear Dielectric Media
Kerr Nonlinear Dielectric Media Resonant Features
2008/10/29
A theoretical study is presented of guided modes of a photonic crystal waveguide for cases in which they interact with multiple bound electromagnetic modes localized on off-channel impurity features o...
Features of the structure of phase-separated and porous borosilicate glasses with/without an impurity of fluorid-ions according to electron microscopy
phase-separated glass
2011/5/5
The comparative research of the structure of the phase-separated glasses of sodium borosilicate system with/without the additives of fluorides and phosphorus oxide, as well as of the porous glasses re...
Some expected extraordinary behaviours of nitride vertical-cavity surface-emitting lasers following from special features of nitride materials
modelling nitride VCSELs interactions between physical phenomena
2011/4/25
In spite of dramatic efforts of numerous technological centres in the world, until now room-temperature continuous-wave operation of nitride diode vertical-cavity surface-emitting lasers (VCSEL) has n...