Gain spectrum measurement using the segmented contact method with an integrated optical amplifier

buckling of viscoelastic composite plates using the finite strip method

در سال های اخیر، تقاضای استفاده از تئوری خطی ویسکوالاستیسیته بیشتر شده است. با افزایش استفاده از کامپوزیت های پیشرفته در صنایع هوایی و همچنین استفاده روزافزون از مواد پلیمری، اهمیت روش های دقیق طراحی و تحلیل چنین ساختارهایی بیشتر شده است. این مواد جدید از خودشان رفتارهای مکانیکی ارائه می دهند که با تئوری های الاستیسیته و ویسکوزیته، نمی توان آن ها را توصیف کرد. این مواد، خواص ویسکوالاستیک دارند....

Optical simulation and experimental measurement of gamma ray energy spectrum of plastic scintillators with different sizes

The application of large plastic scintillators is widely increasing in the different areas of industry, medicine and security due to technical and economic advantages. One of the main disadvantages of these detectors is the unknown position of Compton edge at gamma ray spectrum. In this research, GEANT4/GATE code has been used to simulate the gamma ray spectrum for different volumes of large pl...

90-nm Wideband Optical Amplifier Including an Semiconductor Optical Amplifier and a DCF-based Raman Fiber Amplifier with Gain Clamping and Dispersion Compensation

A 90-nm wideband (1500-1590nm) optical amplifier consisting of a dispersion-compensated-fiber-based Raman fiber amplifier and a semiconductor optical amplifier with gain clamping and dispersion compensation is demonstrated for wide bandwidth amplification with gain flatness as well as dispersion compensation. 10Gb/s DWDM transmission over 100km conventional single-mode fiber link with low biter...

An Integrated Circuit for EEG Acquisition System with Programmable Gain Amplifier in 0.18μm Technology

This work describes a 0.18μm CMOS implementation of an EEG acquisition system with programmable gain amplifier. Gain of the amplifier is digitally programmable from 35.09 dB to 62.55 dB by using 6 bits digital input. EEG input signals are of the range of few micro-voltage. Hence a high gain operational transconductance amplifier with gain of 62.83 dB is designed. Two 22:1 multiplexers with 5 se...

All-optical Processes in Integrated Optical Devices Using Materials with Large Third-order Nonlinearities and Gain