PHOTONIC CRYSTAL BASED 236

What kind of crystal is used in silicon photonics modules

What kind of crystal is used in silicon photonics modules

One-dimension (1D) photonic crystals have been widely used in silicon photonics due to its simple structure and multiple working regimes: difraction, Bragg reflection, and sub-wavelength regimes. Due to their periodic modulation of the refractive index they exhibit a band-structure for photons. After summariz-ing the theory of photonic bandgap materials, the preparation and linear optical properties of 1D, 2D, and 3D silicon-based photonic crystals are discussed. The original discovery of Photonic Crystals was reviewed by Yablonovitch in his popular SCIENTIFIC AMERICAN article. This feature results in a spectral region over which no light can propagate within such a material, known as the photonic band gap (PBG).

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Liquid Crystal Spatial Light Modulator

Liquid Crystal Spatial Light Modulator

(MIIPS) is a technique based on the computer-controlled phase scan of a linear-array spatial light modulator. Through the phase scan to an ultrashort pulse, MIIPS can not only characterize but also manipulate the ultrashort pulse to get the needed pulse shape at target spot (such as for optimized peak power, and other specific pulse shapes).

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Power System Relay Protection Based on ETAP

Power System Relay Protection Based on ETAP

In this video we go over how to model protective relays using the ETAP software in an example 230kV/13. Analyze and evaluate the performance of power system protection with intelligent tools and powerful capabilities from ETAP. This course focuses on using ETAP (Electrical Transient and Analysis Program) software for designing, analyzing, and optimizing protection systems.

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