Open AccessQ value analysis of a first-order IIR microwave photonic filter based on SOA
Author(s) -
Lina Zhou,
Chi Zhang,
Enming Xu,
Dexiu Huang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1036
Subject(s) - infinite impulse response , optical amplifier , bandwidth (computing) , photonics , optical filter , physics , optics , optical power , filter (signal processing) , optoelectronics , telecommunications , computer science , digital filter , laser , computer vision
The Q value of a first-order infinite impulse response (IIR) microwave photonic filter based on a semiconductor optical amplifier (SOA) in a loop is investigated theoretically and experimentally. The maximum Q value measured is around 200 by setting a narrow bandwidth optical filter in the active loop and changing the input optical power of the loop and the pump current of the SOA. Analysis shows that increasing the signal to noise ratio and the gain of the signal light through the loop contributes to achieving higher Q value. The influences of the input optical power, the pump current of the SOA and the bandwidth of the optical filter in the loop on the Q value are calculated, based on the amplified spontaneous emission (ASE) noise of the SOA being investigated. Experimental results are in good agreement with the calculated results.