Light coupling characteristics of a planar microlens

1993 ◽  
Vol 76 (10) ◽  
pp. 10-20 ◽  
Author(s):  
Masahiro Oikawa ◽  
Hideki Imanishi ◽  
Takashi Kishimoto
Keyword(s):  
Light Coupling ◽  
Planar Microlens ◽  
Coupling Characteristics

Light coupling characteristics of planar microlens

1991 ◽  
Author(s):  
Masahiro Oikawa ◽  
Hiroyuki Nemoto ◽  
Kenjiro Hamanaka ◽  
Hideki Imanishi ◽  
Takashi Kishimoto
Keyword(s):  
Light Coupling ◽  
Planar Microlens ◽  
Coupling Characteristics

Light coupling between LD and optical fiber using high NA planar microlens

1990 ◽  
Author(s):  
Masahiro Oikawa ◽  
Hiroyuki Nemoto ◽  
Kenjiro Hamanaka ◽  
Takashi Kishimoto
Keyword(s):  
Optical Fiber ◽  
Light Coupling ◽  
Planar Microlens

Structural and light coupling characteristics of patterned silica–titania sol–gel thin films with/without nano gold coatings

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 109218-109233 ◽  
Author(s):  
Saswati Sarkar ◽  
Rik Chattopadhyay ◽  
Sunirmal Jana
Keyword(s):  
Thin Films ◽  
Soft Lithography ◽  
Sol Gel ◽  
Nano Gold ◽  
Light Coupling ◽  
Coupling Characteristics ◽  
Titania Sol

Soft lithography-based 1-dimensional/2-dimensional patterned silica–titania sol–gel thin films with/without nano-Au coatings and their light coupling characteristics.

scholarly journals Combustion Optimization for Coal Fired Power Plant Boilers Based on Improved Distributed ELM and Distributed PSO

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1036 ◽  
Author(s):  
Xinying Xu ◽  
Qi Chen ◽  
Mifeng Ren ◽  
Lan Cheng ◽  
Jun Xie
Keyword(s):  
Power Plant ◽  
Combustion Process ◽  
Optimization Method ◽  
Combustion Efficiency ◽  
Pollutant Emissions ◽  
Combustion Model ◽  
Nox Emissions ◽  
Coupling Characteristics ◽  
Learning Machine ◽  
Combustion Optimization

Increasing the combustion efficiency of power plant boilers and reducing pollutant emissions are important for energy conservation and environmental protection. The power plant boiler combustion process is a complex multi-input/multi-output system, with a high degree of nonlinearity and strong coupling characteristics. It is necessary to optimize the boiler combustion model by means of artificial intelligence methods. However, the traditional intelligent algorithms cannot deal effectively with the massive and high dimensional power station data. In this paper, a distributed combustion optimization method for boilers is proposed. The MapReduce programming framework is used to parallelize the proposed algorithm model and improve its ability to deal with big data. An improved distributed extreme learning machine is used to establish the combustion system model aiming at boiler combustion efficiency and NOx emission. The distributed particle swarm optimization algorithm based on MapReduce is used to optimize the input parameters of boiler combustion model, and weighted coefficient method is used to solve the multi-objective optimization problem (boiler combustion efficiency and NOx emissions). According to the experimental analysis, the results show that the method can optimize the boiler combustion efficiency and NOx emissions by combining different weight coefficients as needed.

scholarly journals Giant enhancement of THz-frequency optical nonlinearity by phonon polariton in ionic crystals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yao Lu ◽  
Qi Zhang ◽  
Qiang Wu ◽  
Zhigang Chen ◽  
Xueming Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Optical Nonlinearity ◽  
Ionic Crystals ◽  
Nonlinear Optical Susceptibility ◽  
Time Resolved ◽  
Light Coupling ◽  
Tremendous Progress ◽  
Fundamental Research ◽  
Ionic Contribution ◽  
Time Resolved Imaging

AbstractThe field of nonlinear optics has grown substantially in past decades, leading to tremendous progress in fundamental research and revolutionized applications. Traditionally, the optical nonlinearity for a light wave at frequencies beyond near-infrared is observed with very high peak intensity, as in most materials only the electronic nonlinearity dominates while ionic contribution is negligible. However, it was shown that the ionic contribution to nonlinearity can be much larger than the electronic one in microwave experiments. In the terahertz (THz) regime, phonon polariton may assist to substantially trigger the ionic nonlinearity of the crystals, so as to enhance even more the nonlinear optical susceptibility. Here, we experimentally demonstrate a giant second-order optical nonlinearity at THz frequency, orders of magnitude higher than that in the visible and microwave regimes. Different from previous work, the phonon-light coupling is achieved under a phase-matching setting, and the dynamic process of nonlinear THz generation is directly observed in a thin-film waveguide using a time-resolved imaging technique. Furthermore, a nonlinear modification to the Huang equations is proposed to explain the observed nonlinearity enhancement. This work brings about an effective approach to achieve high nonlinearity in ionic crystals, promising for applications in THz nonlinear technologies.

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