Open AccessMicrowave photonic notch filter based on polarisation multiplexing and cross gain modulation in a semiconductor optical amplifier
Author(s) -
Mirza J.,
Kanwal B.,
Ghafoor S.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.3157
Subject(s) - band stop filter , optical amplifier , photonics , optics , filter (signal processing) , multiplexing , optical filter , materials science , modulation (music) , optoelectronics , semiconductor laser theory , physics , laser , electronic engineering , low pass filter , electrical engineering , engineering , acoustics
A coherent interference‐free tunable microwave photonic notch filter with a pair of negative and positive coefficients generated by employing polarisation multiplexing and cross gain modulation in a semiconductor optical amplifier is proposed and demonstrated through simulation results. The negative and positive coefficients of the notch filter are realised through two orthogonal polarisation states of a single continuous wave laser diode. The free spectral range of microwave photonic filter is tuned by varying the differential group delay of a birefringent single‐mode fibre. The proposed filter shows good tunability, easy implementation and is cost‐effective.