Open AccessFrequency multiplying optoelectronic oscillator based on nonlinearly-coupled double loops
Author(s) -
Wei Xu,
Jin Tao,
Hao Chi
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.032516
Subject(s) - dbc , phase noise , offset (computer science) , physics , optics , oscillation (cell signaling) , microwave , frequency offset , oscillator phase noise , optoelectronics , telecommunications , noise figure , channel (broadcasting) , quantum mechanics , biology , computer science , orthogonal frequency division multiplexing , genetics , programming language , amplifier , cmos
We propose and demonstrate a frequency multiplying optoelectronic oscillator with nonlinearly-coupled double loops based on two cascaded Mach-Zehnder modulators, to generate high frequency microwave signals using only low-frequency devices. We find the final oscillation modes are only determined by the length of the master oscillation loop. Frequency multiplying signals are generated via nonlinearly-coupled double loops, the output of one loop being used to modulate the other. In the experiments, microwave signals at 10 GHz with -121 dBc/Hz phase noise at 10 kHz offset and 20 GHz with -112.8 dBc/Hz phase noise at 10 kHz offset are generated. Meanwhile, their side-mode suppression ratios are also evaluated and the maximum ratio of 70 dB is obtained.