Optical spectrum compression employing time-dependent filtering and its application in optical quantization based on soliton self-frequency shift

2018 ◽  
Author(s):  
Zhiyao Zhang ◽  
Xuyan Zhang ◽  
Lingjie Zhang ◽  
Heping Li ◽  
Yong Liu
Keyword(s):  
Frequency Shift ◽  
Optical Spectrum ◽  
Time Dependent ◽  
Optical Quantization

scholarly journals Optical quantization based on soliton self-frequency shift and a flexible spectrum compression scheme utilizing time-dependent filtering

2019 ◽  
Vol 27 (15) ◽  
pp. 21435
Author(s):  
Xuyan Zhang ◽  
Zhiyao Zhang ◽  
Botao Wang ◽  
Dong Liang ◽  
Yali Zhang ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Time Dependent ◽  
Compression Scheme ◽  
Optical Quantization

Optical Quantization in All-Optical Analogy-to-Digital Converter Based on Raman Self-Frequency Shift

2009 ◽  
Vol 36 (2) ◽  
pp. 383-386 ◽  
Author(s):  
梁锐 Liang Rui ◽  
周晓军 Zhou Xiaojun ◽  
李和平 Li Heping ◽  
刘永智 Liu Yongzhi ◽  
刘永 Liu Yong
Keyword(s):  
Frequency Shift ◽  
Digital Converter ◽  
All Optical ◽  
Optical Quantization ◽  
Optical Analogy

scholarly journals Optical spectra of 2D monolayers from time-dependent density functional theory

2020 ◽  
Vol 224 ◽  
pp. 467-482
Author(s):  
S. Di Sabatino ◽  
J. A. Berger ◽  
P. Romaniello
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Optical Spectrum ◽  
Optical Spectra ◽  
Time Dependent ◽  
Functional Theory ◽  
Dependent Density

Our recently developed pure Kohn–Sham approach for the calculation of optical spectra is applied to the challenging case of 2D monolayers. Our protocol yields a qualitatively good optical spectrum for h-BN, whereas improvements are needed for MoS2.

Four-bit all-optical quantization based on Raman self-frequency shift and spectral compression

2009 ◽  
Vol 5 (6) ◽  
pp. 437-440
Author(s):  
Rui Liang ◽  
Xiao-jun Zhou ◽  
Zhi-yao Zhang ◽  
He-ping Li ◽  
Yongzhi Liu ◽  
...  
Keyword(s):  
Frequency Shift ◽  
All Optical ◽  
Spectral Compression ◽  
Optical Quantization

scholarly journals Photometric and Polarimetric Observations of the RV Tauri Star AR Puppis

1988 ◽  
Vol 108 ◽  
pp. 223-224
Author(s):  
A.V. Raveendran ◽  
N. Kameswara Rao
Keyword(s):  
Light Curve ◽  
Infrared Radiation ◽  
Optical Spectrum ◽  
Large Time ◽  
Broad Band ◽  
Wavelength Dependence ◽  
Continuous Variation ◽  
Tauri Star ◽  
Time Dependent ◽  
Linear Polarisation

RV Tauri stars are variable yellow supergiants and they display anomalous excesses in infrared radiation indicating the presence of cool and extended dust thermospheres, presumbly formed from the matter ejected by them (Gehrz 1972). AR Pup, recognised as a member of RV Tauri stars, shows strong CH and CN bands in the optical spectrum and is considered to be carbon-rich (Lloyd Evans 1974). During a programme of broad band polarimetric observations of carbon variables, AR Pup was found to exhibit a large and highly time-dependent linear polarisation (Raveendran & Kameswara Rao 1987).During the period from 1987 January 20 to April 6, AR Pup was observed on 33 nights through standard B and V filters with the 34-cm reflector of the Vainu Bappu Observatory, Kavalur. We also obtained UBVRI polarimetry of AR Pup with the PRL - Polarimeter (Deshpande et al. 1985) attached to the 102-cm reflector on six nights during the same period. Present observations clearly indicate that the large time dependent variations in polarisation, both in the amount and wavelength dependence, observed at earlier epochs by us were not isolated events but were segments of a continuous variation which is cyclic and related to the light curve.

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