Abstract

A tunable optoelectronic oscillator (OEO) for detecting low-power radiofrequency (RF) signals is proposed and experimentally demonstrated. The tunable OEO is mainly composed of a tunable laser source, a phase modulator, a phase-shifted fiber Bragg grating (PS-FBG) and a photodetector. The PS-FBG is used as a notch filter to remove one sideband of the phase-modulated signal to realize the phase modulation to intensity modulation conversion, which determines the main oscillation mode of the OEO. The frequency of the RF signal under detection can be estimated by the frequency difference between the optical carrier from the TLS and the notch of the PS-FBG. The RF signal as low as -75 dBm is detected with a dynamic range of 80 dB. The RF signals from 1.5 to 4.5 GHz are selectively amplified with a gain of about 7dB.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.