Browsing by Author "Sangeetha, S."

Now showing 1 - 3 of 3

A low loss hexagonal six-port optical circulator using silicon photonic crystal
(Springer, 2023) Sangeetha, S.; Vani, D.; Gupta, P.; Krishnan, P.
A 6-port optical circulator using silicon photonic crystals has been designed and proposed in this paper as an essential component of an optical communication system. The proposed 6-port circulator has greater isolation values between the input and isolated ports and lower insertion loss values between the input and output ports. The proposed circulator achieves maximum isolation of 38.7 dB and minimum insertion loss of 0.0029 dB. The proposed designs are extremely useful in the telecommunications industry, wavelength division multiplexing and photonic integrated circuits applications due to their low insertion and high isolations. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Findings of the Shared Task on Offensive Span Identification from Code-Mixed Tamil-English Comments
(Association for Computational Linguistics (ACL), 2022) Ravikiran, M.; Chakravarthi, B.R.; Anand Kumar, M.; Sangeetha, S.; Rajalakshmi, R.; Thavareesan, S.; Ponnusamy, R.; Mahadevan, S.
Offensive content moderation is vital in social media platforms to support healthy online discussions. However, their prevalence in code-mixed Dravidian languages is limited to classifying whole comments without identifying part of it contributing to offensiveness. Such limitation is primarily due to the lack of annotated data for offensive spans. Accordingly, in this shared task, we provide Tamil-English code-mixed social comments with offensive spans. This paper outlines the dataset so released, methods, and results of the submitted systems. Â© 2022 Association for Computational Linguistics.
High-Performance Eight-Channel Photonic Crystal Ring Resonator–Based Optical Demultiplexer for DWDM Applications
(Springer, 2021) Berry, A.; Anand, N.; Sangeetha, S.; Krishnan, P.
In this paper, a photonic crystal ring resonator (PCRR)-based optical demultiplexer is reported for Dense Wavelength Division Multiplexing (DWDM) applications. Diamond and silicon-dioxide are designed and simulated by an eight-channel PCRR. An average uniform spacing of 0.8 nm and 1.94 nm is obtained for the proposed demultiplexer, with silicon-dioxide and diamond, respectively. For the eight-channel PCRR structure, silicon-dioxide results in a maximum transmission efficiency of 91.48%. The quality factor is measured as 1613.336. Because of its light guiding mechanism, the ring resonator is found to be the most suitable and convenient for having dense wavelength division multiplexing amongst the different optical devices available based on photonic crystals. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.