搜索结果: 1-15 共查到“光学工程 structures”相关记录48条 . 查询时间(0.42 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...
2017SPIE光学，结构，元件和子系统材料技术和应用专题会议（Material Technologies and Applications to Optics,Structures,Components,and Sub-Systems III）
2017 SPIE 光学，结构，元件和子系统材料技术和应用 专题会议
2017/4/25
2017SPIE光学，结构，元件和子系统材料技术和应用专题会议（Material Technologies and Applications to Optics,Structures,Components,and Sub-Systems III）。
Displacement-sensitive photonic crystal structures based on guided resonance in photonic crystal slabs
Displacement-sensitive photonic crystal structures guided resonance photonic crystal slabs
2015/8/11
We introduce a mechanically tunable photonic crystal structure consisting of coupled photonic crystal slabs. Using both analytic theory, and first-principles finite-difference time-domain ...
3D MODELING OF STRUCTURES USING BREAK-LINES AND CORNERS IN 3D POINT CLOWD DATA
Cultural Heritage Modeling Visualization Laser scanning Representation
2015/8/7
Recently, a laser scanner has been receiving more attention as a useful tool for real-time 3D data
acquisition, and various applications such as city modeling, DTM generation and 3D modeling of cult...
Accelerating simulation of ensembles of locally differing optical structures via a Schur complement domain decomposition
Accelerating simulation optical structures Schur complement domain decomposition
2015/8/6
We present a Schur complement domain decomposition method that can significantly accelerate simulation of ensembles of locally differing optical structures. We apply the method to design a multi-spati...
Ultrabroadband Photonic Structures To Achieve High-Performance Daytime Radiative Cooling
Radiative cooling thermal radiation broadband solar mirror phonon-polariton selective emission
2015/8/7
If properly designed, terrestrial structures can passively cool themselves through radiative emission of heat to outer space. For the first time, we present a metal-dielectric photonic structure...
From Electromagnetically Induced Transparency to Superscattering with a Single Structure: A Coupled-Mode Theory for Doubly Resonant Structures
Electromagnetically Induced Transparency Superscattering Single Structure Coupled-Mode Theory Doubly Resonant Structures
2015/8/7
We observe from simulations that a doubly resonant structure can exhibit spectral behavior analogous to electromagnetically induced transparency, as well as superscattering, depending on the excitatio...
S4:A free electromagnetic solver for layered periodic structures
Computational electromagnetics Maxwell solver Fourier modal method
2015/8/7
We describe S4, a free implementation of the Fourier modal method (FMM), which has also been commonly referred to as rigorous coupled wave analysis (RCWA), for simulating electromagnetic propagation t...
Thermodynamic Upper Bound on Broadband Light Coupling with Photonic Structures
Thermodynamic Broadband Light Coupling Photonic Structures
2015/8/7
The coupling between free space radiation and optical media critically influences the performance of optical devices. We show that, for any given photonic structure, the sum of the external coup...
Noise Suppression for Fiber Radio Transmission on Spectrum-Sliced WDM-PONs Employing Interferometric Structures
Fiber optics communications Radio frequency photonics
2015/5/26
We propose a novel noise-suppression scheme in spectrum-sliced WDM-PONs.Experimentally, low-noise windows can be created in which the noise is reduced by more than 20dB and the performance of vector s...
High Efficiency Optical Switches with Heater-on-Slab (HoS) Structures
Couplers Switches Multiplexers Waveguides Slab
2015/5/21
We propose optical switches in which the heater is fabricated directly on the slab region of the rib waveguide. Two types of Heater-on-Slab (HoS) switches were investigated. In the first type, the sil...
A Novel Dispersion Controlling Technique Using Doped Ring Structures within Photonic Crystal Fibers
Dispersion Photonic Crystal Fibers Ring Structures
2015/5/14
We proposed the novel photonic crystal fiber structure which uses high/low doping material around each cladding holes. Through the numerical analysis, we confirmed that this fiber structure will intro...
'Smart' solutions for human skin, bridge testing and more are in largest-ever SPIE Smart Structures/NDE program
human skin SPIE Smart Structures/NDE program nondestructive testing
2011/4/22
Smart structures that emulate human muscles and skin and nondestructive testing of bridges and airline cargo will be among advances presented at an international conference in San Diego, California, n...
Properties of the angular gap in one-dimensional periodic structures containing left-handed metamaterials
left-handed metamaterials photonic gaps optical bistability
2011/5/5
Wave propagation is investigated in one-dimensional periodic structures containing layers of
left-handed metamaterials. For a special choice of parameters, an angular gap appears due to total
intern...
Mapping local optical densities of states in silicon photonic structures with nanoscale electron spectroscopy
Mapping local optical densities silicon photonic structures nanoscale electron spectroscopy
2015/8/10
Relativistic electrons in a structured medium generate radiative losses such as Cherenkov and transition radiation that act as a virtual light source, coupling to the photonic densities of states. The...