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G. NING1,* , S. ADITYA1, P. SHUM1
We demonstrate a tunable microwave-photonic notch filter based on two 3dB Hi-Bi couplers, a half-wave plate, and a variable time delay line. The configuration is free from the problems of optically coherent interference and chromatic dispersion. Expressions for the filter transfer function, as well as its application in a 20 km radio-over-fiber (RoF) link, are presented. Measured results match the calculated results and show a notch rejection greater than 35 dB. The scheme can operate over a wide range of optical carrier frequencies.
Microwave photonics, Radio-over-fiber, Differential group delay.
G. NING, S. ADITYA, P. SHUM, Tunable microwave photonic notch filter with two Hi-Bi couplers, Optoelectronics and Advanced Materials - Rapid Communications, 1, 7, July 2007, pp.356-359 (2007).
Submitted at: March 30, 2007
Accepted at: June 26, 2007
Optoelectronics and Advanced Materials - Rapid Communications
(2024): Impact Factor = 0.4 - Journal Citation Reports (Clarivate Analytics, 2025)
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