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Terahertz signal generation based on a microwave photonic system with add‐drop microring resonator
Author(s) -
Katti Rohan,
Prince Shanthi
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32375
Subject(s) - terahertz radiation , resonator , microwave , materials science , optoelectronics , photonics , signal (programming language) , port (circuit theory) , optics , laser , pulse (music) , drop (telecommunication) , electronic engineering , physics , telecommunications , computer science , engineering , detector , programming language
A microwave photonic system based on a silicon add‐drop microring resonator is proposed and analyzed in simulation environment. It is observed that when a pulsed laser source (PLS) of repetition rate of 100 Gbps is fed to input port of MRR and a PLS with repetition rate of 50 Gbps is fed at the add port of the MRR, THz signals in the frequency band of 0.1‐1.5 THz are generated with a spacing of 0.05 THz. The power of the highest frequency component (1.5 THz) is ‐65.1 dBm when the pulse width of PLS is 0.1 ps. This generation of THz signals is a result of interference between two optical signals of different repetition rates which are evanescently coupled into the ring cavity at the input ports of MRR. It is found that power of THz signal is higher when the pulse width of PLS is smaller.