A fiber Bragg grating interrogator assembly, comprising: an optical fiber including a fiber Bragg grating (FBG; 122) having a variable Bragg wavelength (.sub.B) and a dynamic range of interest (.sub.dyn,B) over which the Bragg wavelength (.sub.B) can shift during use; a light source operably connected to the optical fiber, and configured to illuminate the fiber Bragg grating to solicit a response therefrom; and an response analyzer, including: a spectrally selective device having an input port and a plurality of output ports (149-n), wherein the input port is operably connected to the optical fiber and wherein each of the output ports is associated with a respective spectral range (.sub.n), said spectrally selective device being configured to provide a spectral energy distribution of a response of the fiber Bragg grating received on the input port onto said output ports.

A communication network node (100) comprising: an antenna array (104) comprising a plurality of radiating elements (106); a plurality of photodiodes (108) connected to the radiating elements; an optical delay line (110) configured to receive an optical carrier signal modulated with an RF signal; and a plurality of optical splitters (112) provided along the optical delay line, the optical splitters configured to split off portions of the optical carrier signal to form a plurality of optical output signals and to deliver the optical output signals to the photodiodes. The photodiodes are configured to recover respective portions of the RF signal from the optical output signals and to deliver said portions of the RF signal to the radiating elements. The optical delay line is configured to time delay the optical carrier signal between variable optical splitters to phase shift the RF signal.