Time-division multiplexing (OTDM) using ultrashort picosecond pulses in a terahertz optical asymmetric demultiplexer (TOAD)

Author(s):  
A.M. Melo ◽  
R.S. de Oliveira ◽  
J.L.S. Lima ◽  
A.S.B. Sombra
2015 ◽  
Vol 36 (4) ◽  
Author(s):  
Kamaldeep Kaur ◽  
K. S. Bhatia

AbstractIn this paper, optical time division multiplexing is demonstrated using TOAD (terahertz optical asymmetric demultiplexer), which employs semiconductor optical amplifier (SOA) as nonlinear switching element. The TOAD device in its original configuration is based on Sagnac interferometer (also referred to as nonlinear optical loop mirror – NOLM).


2020 ◽  
Vol 2020 (2) ◽  
pp. 100-1-100-6
Author(s):  
Takuya Omura ◽  
Hayato Watanabe ◽  
Naoto Okaichi ◽  
Hisayuki Sasaki ◽  
Masahiro Kawakita

We enhanced the resolution characteristics of a threedimensional (3D) image using time-division multiplexing methods in a full-parallax multi-view 3D display. A time-division light-ray shifting (TDLS) method is proposed that uses two polarization gratings (PGs). As PG changes the diffraction direction of light rays according to the polarization state of the incident light, this method can shift light rays approximately 7 mm in a diagonal direction by switching the polarization state of incident light and adjusting the distance between the PGs. We verified the effect on the characteristics of 3D images based on the extent of the shift. As a result, the resolution of a 3D image with depth is improved by shifting half a pitch of a multi-view image using the TDLS method, and the resolution of the image displayed near the screen is improved by shifting half a pixel of each viewpoint image with a wobbling method. These methods can easily enhance 3D characteristics with a small number of projectors.


2021 ◽  
Vol 21 (9) ◽  
pp. 11131-11139
Author(s):  
Sen Wu ◽  
Zhijian Liu ◽  
Kezhen Yu ◽  
Zixiao Fan ◽  
Ziyi Yuan ◽  
...  

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