Title :
Oscillator phase noise reduction using optical feedback with dual drive Mach-Zehnder modulator
Author :
Tianchi Sun ; Li Zhang ; Receveur, Kevin ; Poddar, Ajay K. ; Rohde, Ulrich L. ; Daryoush, Afshin S.
Author_Institution :
Dept. of ECE, Drexel Univ., Philadelphia, PA, USA
Abstract :
A reduced phase noise of stable microwave oscillators is reported by forced oscillation using self-ILPLL technique fiber optical delayed feedback. Fiber optic links using single drive and dual drive MZM have been used to implement the optical feedback path. A phase noise reduction of 22 dB at 300 Hz offset is measured for a commercially available DRO at 10 GHz using dual drive MZM in long fiber optic delay lines. The measured -127 dBc/Hz at 14 kHz offset has been demonstrated by employing 4km and 8km fiber optic delay lines.
Keywords :
injection locked oscillators; microwave oscillators; optical delay lines; optical feedback; optical links; optical modulation; optical phase locked loops; phase noise; distance 4 km; distance 8 km; dual drive Mach-Zehnder modulator; fiber optic delay lines; fiber optic links; fiber optical delayed feedback; forced oscillation; frequency 10 GHz; injection locking; optical feedback; oscillator phase noise reduction; phase locked loop; self-ILPLL technique; single drive MZM; stable microwave oscillators; Area measurement; Force measurement; Indexes; Optical fiber polarization; Phase measurement; dielectric resonator oscillator; dual drive Mach-Zehnder modulator; self-injection locked phase locked loop;
Conference_Titel :
Microwave Symposium (IMS), 2015 IEEE MTT-S International
Conference_Location :
Phoenix, AZ
DOI :
10.1109/MWSYM.2015.7167145
