Title :
Tunable Frequency-Quadrupling Dual-Loop Optoelectronic Oscillator
Author :
Zhu, Dan ; Pan, Shilong ; Ben, De
Author_Institution :
Microwave Photonics Res. Lab., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A tunable frequency-quadrupling dual-loop optoelectronic oscillator (OEO) based on a polarization modulator is proposed and demonstrated. The introduce of frequency quadrupling in the proposed OEO not only increases the maximal achievable frequency by four times, extends the tuning range by four times, but also enables powerful optical signal processing functions. By incorporating an electrical-tunable yttrium-iron-garnet bandpass filter in the proposed OEO and employing a fiber Bragg grating as a wavelength-fixed optical notch filter, a high-quality microwave signal with a frequency tunable from 32 to 42.7 GHz is generated. The phase noise of the generated frequency-quadrupling signal is also studied.
Keywords :
Bragg gratings; band-pass filters; microwave oscillators; millimetre wave oscillators; notch filters; optical fibre filters; optical modulation; optoelectronic devices; bandpass filter; dual-loop optoelectronic oscillator; electrical-tunable filter; fiber Bragg grating; frequency 32 GHz to 42.7 GHz; high-quality microwave signal; optical signal processing functions; polarization modulator; tunable frequency-quadrupling oscillator; wavelength-fixed optical notch filter; yttrium-iron-garnet; Band pass filters; Microwave filters; Optical fibers; Optical filters; Optical polarization; Optical signal processing; Frequency-quadrupling; optoelectronic oscillator; tunable; yttrium-iron-garnet;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2176332
