Photonic phase shifter of phase-coded microwave signal with programmabilities

Abstract

We propose a photonic scheme to generate a programmable frequency phase-coded microwave signal based on a photonic phase shifter. The experimental results implement 30 GHz signal with the coding rate of 3 Gb/s.

Frequency Scanning Multibeamforming Method Based on CFBG Photonic Microwave Oscillation

“…Te frequency source (inside the dashed boxed) is given by a CFBG-based two-loop photoelectric oscillator [8], which is mainly composed of a light source, a polarizer, a polarization combiner, single mode fbers, a photodiode, a radio frequency amplifer, a chirped grating, and a Mach-Zehnder external modulator (MZM) [9][10][11][12][13]. Te tuneable photoelectric oscillator can be tuned by using a chirped fber Bragg grating (CFBG) as a photonic flter to select the frequency of the oscillation mode [14][15][16]. Te carrier signal f 0 provided by the laser source is input to the modulator.…”

“…Te frequency of the oscillation mode could be selected to achieve frequency adjustment. Te frequency response of the photon flter corresponding to the grating is given as [16,17]…”