All-optical method of developing parity generator and checker with polarization encoded light signal

2012 ◽  
Vol 41 (3) ◽  
pp. 167-172 ◽  
Author(s):  
Debajyoti Samanta ◽  
Sourangshu Mukhopadhyay
2021 ◽  
Vol 11 (4) ◽  
pp. 1499
Author(s):  
Bingchen Han ◽  
Junyu Xu ◽  
Pengfei Chen ◽  
Rongrong Guo ◽  
Yuanqi Gu ◽  
...  

An all-optical non-inverted parity generator and checker based on semiconductor optical amplifiers (SOAs) are proposed with four-wave mixing (FWM) and cross-gain modulation (XGM) non-linear effects. A 2-bit parity generator and checker using by exclusive NOR (XNOR) and exclusive OR (XOR) gates are implemented by first SOA and second SOA with 10 Gb/s return-to-zero (RZ) code, respectively. The parity and check bits are provided by adjusting the center wavelength of the tunable optical bandpass filter (TOBPF). A saturable absorber (SA) is used to reduce the negative effect of small signal clock (Clk) probe light to improve extinction ratio (ER) and optical signal-to-noise ratio (OSNR). For Pe and Ce (even parity bit and even check bit) without Clk probe light, ER and OSNR still maintain good performance because of the amplified effect of SOA. For Po (odd parity bit), ER and OSNR are improved to 1 dB difference for the original value. For Co (odd check bit), ER is deteriorated by 4 dB without SA, while OSNR is deteriorated by 12 dB. ER and OSNR are improved by about 2 dB for the original value with the SA. This design has the advantages of simple structure and great integration capability and low cost.


2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Sana Rebhi ◽  
Radhouene Massoudi ◽  
Monia Najjar

AbstractIn this paper, an ultra-fast all-optical modulator, based on a new shape of nonlinear photonic crystal ring resonator, is designed and studied. Numerical methods such as plane wave expansion (PWE) and finite-difference time domain (FDTD) are used to perform simulations. The modulation technique consists of carrier light controlling by means of input light signal and Kerr effect. The investigation of extinction ratio and insertion loss within the carrier input power shows that the choice of 0.7 W is the optimal value of that power to ensure the tradeoff between both characteristics. The suggested modulator demonstrates an excellent extinction ratio about 20.8018, a very low insertion loss of −13.98 and a short switching time about 13.4 ps. According to the obtained results, the modulator can be considered as an ultra-fast and ultra-compact optical component.


2014 ◽  
Vol 23 (7) ◽  
pp. 074206
Author(s):  
Qian-Guang Li ◽  
Huan Chen ◽  
Xiu Zhang ◽  
Xu-Nong Yi

2004 ◽  
Vol 43 (33) ◽  
pp. 6147 ◽  
Author(s):  
Nirmalya Pahari ◽  
Debendra Nath Das ◽  
Sourangshu Mukhopadhyay

2016 ◽  
Vol 57 (2) ◽  
pp. 476 ◽  
Author(s):  
Giuseppe Lombardo ◽  
Norberto Liborio Micali ◽  
Valentina Villari ◽  
Sebastiano Serrao ◽  
Marco Lombardo

ACS Photonics ◽  
2016 ◽  
Vol 3 (3) ◽  
pp. 343-348 ◽  
Author(s):  
Benjamin T. Miles ◽  
Alexander B. Greenwood ◽  
Brian R. Patton ◽  
Henkjan Gersen

2021 ◽  
Vol 9 ◽  
Author(s):  
Jie Feng ◽  
Yifei Li ◽  
Jinguang Wang ◽  
Dazhang Li ◽  
Changqing Zhu ◽  
...  

Abstract We demonstrate an all-optical method for controlling the transverse motion of an ionization injected electron beam in a laser plasma accelerator by using the transversely asymmetrical plasma wakefield. The laser focus shape can control the distribution of a transversal wakefield. When the laser focus shape is changed from circular to slanted elliptical in the experiment, the electron beam profiles change from an ellipse to three typical shapes. The three-dimensional particle-in-cell simulation result agrees well with the experiment, and it shows that the trajectories of these accelerated electrons change from undulating to helical. Such an all-optical method could be useful for convenient control of the transverse motion of an electron beam, which results in synchrotron radiation from orbit angular momentum.


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