Photonic measurement of microwave frequency based on phase modulation.
A photonic approach for microwave frequency measurement is proposed. In this approach, an optical carrier is modulated by an unknown microwave signal through a phase modulator. The modulated optical signal is then split into two parts; one part passes through a spool of polarization maintaining fiber (PMF) and the other one, through a dispersion compensation fiber (DCF), to introduce different microwave power penalties. After the microwave powers of the two parts are measured by two photodetectors, a fixed frequency-to-power mapping is established by obtaining an amplitude comparison function (ACF). A proof-of-concept experiment demonstrates frequency measurement over a range of 10.5 GHz, with measurement error less than +/-0.07 GHz.
Zhou
Junqiang
J
Network Technology Research Centre, Nanyang Technological University, Singapore. jqzhou@pmail.ntu.edu.sg
Fu
Songnian
S
Shum
Perry Ping
PP
Aditya
Sheel
S
Xia
Li
L
Li
Jianqiang
J
Sun
Xiaoqiang
X
Xu
Kun
K
D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D055096:Optical Devices; D017785:Photons; D011874:Radiometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity