Title :
Coherence-free photonic notch filter
Author :
Chan, E.H.W. ; Minasian, R.A.
Author_Institution :
Sch. of Electr. & Inf. Eng. & Australian Photonics CRC, Univ. of Sydney, NSW, Australia
Abstract :
A new coherence-free photonic notch filter structure is presented. It is based on a Sagnac fibre loop interferometer containing an optical intensity modulator. A notch filter response is obtained by modulating the clockwise and counter-clockwise propagating optical waves inside the Sagnac loop at different times. Results demonstrate a robust notch filter operation with a narrow-linewidth laser source, and elimination of phase-induced intensity noise limitations.
Keywords :
Sagnac interferometers; interference suppression; light propagation; notch filters; optical filters; optical modulation; phase noise; Sagnac fibre loop interferometer; Sagnac loop; clockwise propagating optical wave modulation; coherence-free photonic notch filter structure; counter-clockwise propagating optical wave modulation; narrow-linewidth laser source; optical intensity modulator; phase-induced intensity noise; phase-induced intensity noise limitations; robust notch filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20046549
