نتایج جستجو برای: light amplifier

تعداد نتایج: 416915  

Journal: :The Journal of the Institute of Television Engineers of Japan 1961

Journal: :Physical review letters 2002
Sylvain Fasel Nicolas Gisin Grégoire Ribordy Valerio Scarani Hugo Zbinden

It has been shown theoretically that a light amplifier working on the physical principle of stimulated emission should achieve optimal quantum cloning of the polarization state of light. We demonstrate close-to-optimal universal quantum cloning of polarization in a standard fiber amplifier for telecom wavelengths. For cloning 1-->2 we find a fidelity of 0.82, the optimal value being 5 / 6=0.83.

2006
Chia-Hsiung Chang Hermann Lin

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...

Journal: :Optics letters 2016
Yinxin Zhang Chien-Sheng Liao Weili Hong Kai-Chih Huang Huaidong Yang Guofan Jin Ji-Xin Cheng

We demonstrate an ambient light coherent anti-Stokes Raman scattering microscope that allows CARS imaging to be operated under environmental light for field use. The CARS signal is modulated at megahertz frequency and detected by a photodiode equipped with a lab-built resonant amplifier, then extracted through a lock-in amplifier. The filters in both the spectral domain and the frequency domain...

Journal: :international journal of smart electrical engineering 0
hamid niyazi department of electrical engineering, yazd branch, islamic azad university, fakhralsadat rastegari department of electrical engineering, yazd branch, islamic azad university majid pourahmadi department of electrical engineering, yazd branch, islamic azad university

a novel low noise trans-impedance amplifier is proposed using low cost 0.18 µm cmos technology. a resistive-capacitive feedback is used to extend the bandwidth of the amplifier. as the structure is inductor less, it is suitable for low cost integrated optical interconnects. in this paper improved particle swarm optimization have applied to determine optimal trans-resistance and noise of propose...

Journal: :amirkabir international journal of electrical & electronics engineering 2015
r. ebrahimi ghiri a. mohammadi a. abdipour r. mirzavand

a digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. the system is designed in ka-band for a dvb-s2 satellite link. we use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. the six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. this approa...

Journal: :Optics letters 2010
Victor V Kozlov Javier Nuño Juan Diego Ania-Castañón Stefan Wabnitz

We propose and apply a theoretical description of a Raman amplifier based on the vector model of randomly birefringent fibers to the characterization of Raman polarizers. The Raman polarizer is a special type of Raman amplifier with the property of producing a highly repolarized beam when fed by relatively weak and unpolarized light.

رحیم پور سلیمانی, حمید, جابری, محمد , فرهبد, امیرحسین ,

In this paper, the spectral behavior of a two-cell phase conjugated mirror (PCM)with a two-pass Nd:YAG amplifier has been analyzed experimentally and theoretically. For this purpose, amplifier input intensity for the three different states of laser oscillator with one, two and three longitudinal modes have been investigated. The numerical model is based on 2-dimension equations of stokes back-s...

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