optical signal processing
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2022 ◽  
Author(s):  
Shayan Mookherjee

Multi-microresonator photonic circuits can improve the conversion efficiency of nonlinear optics, realize higher-order, implement programmable filters, and other advances in optical signal processing. However, such structures are challenging to realize in practice. Through a deeper understanding of disorder effects in photonics, we have greatly advanced the state-of-the-art in CROW structures and their applications in linear, nonlinear and quantum optics.


2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Danying Yu ◽  
Guangzhen Li ◽  
Meng Xiao ◽  
Da-Wei Wang ◽  
Yong Wan ◽  
...  

AbstractPhotonic honeycomb lattices have attracted broad interests for their fruitful ways in manipulating light, which yet hold difficulties in achieving arbitrary reconfigurability and hence flexible functionality due to fixed geometry configurations. Here we theoretically propose to construct the honeycomb lattice in a one-dimensional ring array under dynamic modulations, with an additional synthetic dimension created by connecting the frequency degree of freedom of light. Such a system is highly re-configurable with parameters flexibly controlled by external modulations. Therefore, various physical phenomena associated with graphene including Klein tunneling, valley-dependent edge states, effective magnetic field, as well as valley-dependent Lorentz force can be simulated in this lattice, which exhibits important potentials for manipulating photons in different ways. Our work unveils an alternative platform for constructing the honeycomb lattice in a synthetic space, which holds complex functionalities and could be important for optical signal processing as well as quantum simulation.


2021 ◽  
Vol 11 (17) ◽  
pp. 8189
Author(s):  
María R. Fernández-Ruiz ◽  
Alejandro Carballar

This paper reviews the state of the art of fiber Bragg gratings (FBGs) as analog all-optical signal processing units. Besides the intrinsic advantages of FBGs, such as relatively low cost, low losses, polarization insensitivity and full compatibility with fiber-optic systems, they have proven to deliver an exceptional flexibility to perform any complex band-limited spectral response by means of the variation of their physical parameters. These features have made FBGs an ideal platform for the development of all-optical broadband filters and pulse processors. In this review, we resume the main design algorithms of signal processors based on FBGs, and we revisit the most common processing units based on FBGs and the applications that have been presented in the literature.


Plasmonics ◽  
2021 ◽  
Author(s):  
Aparna Udupi ◽  
Sathish Kumar Madhava

AbstractA novel plasmonic unidirectional coupler and its extension to a multiplexer/demultiplexer are proposed and simulated. The proposed structure can be etched adjacent to metal-insulator-metal (MIM) waveguides which can result in considerable reduction in footprint of optical signal processing systems. Simulated results show very good agreement with design. Extinction ratio (ER) of more than 11 dB was achieved for both the coupler as well as the multiplexer/demultiplexer. Crosstalk as well as full width at half maximum (FWHM) was also highly acceptable for the multiplexer/demultiplexer. The proposed structures have an additional attractive feature of being amenable to integration with other relevant functionalities as demonstrated in the results.


2021 ◽  
Vol 27 (2) ◽  
pp. 1-11
Author(s):  
Lin Chang ◽  
Andreas Boes ◽  
Haowen Shu ◽  
Weiqiang Xie ◽  
Haijin Huang ◽  
...  

2021 ◽  
Vol 27 (2) ◽  
pp. 1-13
Author(s):  
Bowen Li ◽  
Sheng Wang ◽  
Yuan Wei ◽  
Shu-Wei Huang ◽  
Kenneth K. Y. Wong

2021 ◽  
Vol 27 (2) ◽  
pp. 1-16
Author(s):  
Alan E. Willner ◽  
Ahmad Fallahpour ◽  
Kaiheng Zou ◽  
Fatemeh Alishahi ◽  
Huibin Zhou

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