Title :
Investigation on Tunable Modulation Index in the Polarization-Modulator-Based Optoelectronic Oscillator
Author :
Xinkai Liu ; Wei Pan ; Xihua Zou ; Lianshan Yan ; Bin Luo ; Bing Lu
Author_Institution :
Center for Inf. Photonics & Commun., Southwest Jiaotong Univ., Chengdu, China
Abstract :
Tunable characteristic of the modulation index in the polarization-modulator (PolM)-based optoelectronic oscillator (OEO) is investigated and demonstrated experimentally. The PolM-based OEO is theoretically analyzed and a simplified analytical expression to reveal the variation of the modulation index is derived. Numerical results indicate that a tunable modulation index from 0 to 2.405 can be achieved for stable oscillation inside the OEO. In addition, a proof-of-concept experiment is carried out and the measured modulation indexes exactly follow the simplified analytical expression. Such a tunable modulation index enriches the applications of the OEO in the field of microwave/optical signal generation and processing, such as the generation of the return-to-zero (RZ) and the carrier-suppressed RZ optical pulse trains in our experiment.
Keywords :
integrated optoelectronics; light polarisation; microwave generation; microwave photonics; numerical analysis; optical information processing; optical modulation; optical tuning; PolM-based OEO; carrier-suppressed RZ optical pulse trains; microwave signal generation; numerical analysis; optical signal generation; optoelectronic oscillator; polarization-modulator; return-to-zero signal; simplified analytical expression; stable oscillation; tunable modulation index; Microwave oscillators; Microwave photonics; Optical modulation; Optical polarization; Optical pulses; Optoelectronic oscillator (OEO); modulation index; polarization modulator (PolM);
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2013.2294378
