title: Photonic measurement of microwave frequency based on phase modulation.
abstract: 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.
authors.affiliation: Network Technology Research Centre, Nanyang Technological University, Singapore. jqzhou@pmail.ntu.edu.sg
authors.forename: Junqiang
authors.initials: J
authors.lastname: Zhou
authors.forename: Songnian
authors.initials: S
authors.lastname: Fu
authors.forename: Perry Ping
authors.initials: PP
authors.lastname: Shum
authors.forename: Sheel
authors.initials: S
authors.lastname: Aditya
authors.forename: Li
authors.initials: L
authors.lastname: Xia
authors.forename: Jianqiang
authors.initials: J
authors.lastname: Li
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Sun
authors.forename: Kun
authors.initials: K
authors.lastname: Xu
mesh_terms: 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