搜索结果: 1-15 共查到“光学工程 gratings”相关记录35条 . 查询时间(0.046 秒)
Sensitivity analysis and optimization of sub-wavelength optical gratings using adjoints
Sensitivity analysis sub-wavelength optical gratings
2015/8/6
Numerical optimization of photonic devices is often limited by a large design space: the finite-differences gradient method requires as many electric field computations as there are design...
Dislocated Double-Layer Metal Gratings: An Efficient Unidirectional Coupler
Unidirectional coupler surface plasmon polariton metal grating Wood’s anomaly
2015/8/6
We propose theoretically and demonstrate experimentally a dislocated double-layer metal grating structure, which operates as a unidirectional coupler capable of launching surface plasmon polaritons in...
Sensing With Slow Light in Fiber Bragg Gratings
Bragg gratings fi ber gratings optical fi ber sensors slow light
2015/8/7
On the edge of the bandgap in a fiber Bragg grating(FBG) narrow peaks of high transmission exist at frequencies where light interferes constructively in the forward direction.
Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells with Antireflection and Light-Trapping Nanocone Gratings
Solar cells light trapping antireflection crystalline silicon absorption enhancement nanocone gratings
2015/8/7
Enhancing the light absorption in ultrathin-film silicon solar cells is important for improving efficiency and reducing cost. We introduce a double-sided grating design, where the front and back surfa...
Bragg-Angle Diffraction in Slant Gratings Fabricated by Single-Beam Interference Lithography
Slant Grating Single-Beam Interference Lithography Bragg-Angle Diffraction
2013/1/30
A single-beam interference-lithography scheme is demonstrated for the fabrication of large-area slant gratings, which requires exposure of the photoresist thin film spin-coated on a glass plate with p...
Strong fiber Bragg gratings in Bi-Al co-doped H 2 -loaded optical fibers using CW-Ar + laser
Fiber Bragg gratings photosensitivity Lasers fiber
2015/5/22
Bragg gratings with reflectivity >93% were fabricated in Bi-Al co-doped H 2 -loaded optical fibers. Average index changes as high as +2.5×10 -3 were obtained. Positive core stress changes indicate a c...
Fabrication of Microfiber-Based Bragg Gratings with Ultraviolet-Light Exposure
Fiber Bragg gratings Integrated optics devices Microstructure fabrication
2015/5/22
We fabricated microfiber-based Bragg gratings with ultraviolet-light exposure. Bragg reflections are observed for gratings with diameters of several micron-meters. The dependence of Bragg grating char...
Developments and Applications of Microstructured Fiber Bragg Gratings
Fiber optics components Fiber Bragg gratings Microstructured fibers
2015/5/22
Nowadays, fiber Bragg gratings (FBGs) indisputably represent one of the most powerful in-fiber tools for the development of effective sensing and communication devices.Within this fiber technology, th...
WDM Multi-Channel Filter Based On Sampled Gratings In Silicon-on-Insulator
Integrated optics devices Wavelength filtering devices
2015/5/22
The design and fabrication of sampled gratings on silicon-on-insulator rib waveguides is presented. A multiple reflection up to 20 channels with a spacing of 0.78 nm is demonstrated, with potential fi...
Analog Signal Performance of a Hollow-Core-Waveguide using High-Contrast-Gratings
Analog Signal Performance Hollow-Core-Waveguide High-Contrast-Gratings
2015/5/21
On-chip analog signal performance of high-contrast-grating hollow-core-waveguide is evaluated. SFDR of >100 dB can be achieved for IM3 over a wide RF frequency range of 80 GHz and optical wavelength b...
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...
Intensity-Modulated Optical Fiber Sensors Based on Chirped-Fiber Bragg Gratings
Optical fiber sensors fiber Bragg gratings intensity-modulated sensors
2013/5/27
Intensity-modulated fiber Bragg grating (FBG) sensors, compared with normal wavelength-encoding FBG sensors, can reduce the cost of sensor system significantly by using cost-efficient optical power...
Enhancement of optical absorption in thin-film organic solar cells through the excitation of plasmonic modes in metallic gratings
optical absorption organic solar cells plasmonic modes metallic gratings
2015/8/10
We theoretically investigate the enhancement of optical absorption in thin-film organic solar cells in which the top transparent electrode is partially substituted by a periodic metallic grating...
Temperature-insensitive 2-D tilt sensor by incorporating fiber Bragg gratings with a hybrid pendulum.
Fiber Bragg gratings (FBGs) Fiber-optic sensors Tilt measureme nt Temperature insensitive Hybrid pendu lum
2013/5/27
A novel two-dimensional (2-D) tilt sensor is demonstrated by incorporating only twofiber Bragg gratings (FBGs) with a hybrid pendulum transducer. The pendulum transducer is specially designed with hol...
Hybrid technique based on chirp effect and phase shifts for spectral Talbot effect in sampled fiber Bragg gratings (FBGs)
fiber Bragg gratings Talbot effect dispersion optical fiber communication
2011/5/5
To implement the spectral Talbot effect in sampled fiber Bragg gratings (SFBGs), a hybrid
technique based on a chirp effect and phase shifts is proposed. Firstly, the general phase condition
is deri...