Title :
An Optical Domain Combined Dual-Loop Optoelectronic Oscillator
Author :
Yang, Jiang ; Jin-Long, Yu ; Yao-Tian, Wang ; Li-Tai, Zhang ; En-Ze, Yang
Author_Institution :
Sch. of Electr. & Inf. Eng., Tianjin Univ.
fDate :
6/1/2007 12:00:00 AM
Abstract :
A dual loop optoelectronic oscillator (OEO) is able to effectively suppress the sidemodes in each single loop. In this paper, a dual-loop OEO scheme is reported. By utilizing a polarization-beam splitter and a polarization-beam combiner, the two loops are directly joined in the optical domain without adding any active electrical device. The laser´s phase-to-intensity noise is discussed. We present free-running experimental results, which show a phase noise of -109 dBc/Hz at 10kHz away from the carrier (12 GHz) and a Q value of 1010 with a sidemode suppression ratio of 60 dB, which is improved by 30-50dB in the experimental comparison. Meanwhile, the experimental comparison indicates that no significant noise is introduced by this configuration
Keywords :
integrated optics; integrated optoelectronics; laser noise; light polarisation; optical beam splitters; phase noise; 10 kHz; 12 GHz; dual-loop oscillator; optical domain; optoelectronic oscillator; phase noise; phase-to-intensity noise; polarization-beam combiner; polarization-beam splitter; sidemode suppression ratio; High speed optical techniques; Optical coupling; Optical devices; Optical feedback; Optical filters; Optical noise; Optical resonators; Oscillators; Phase noise; Photodetectors; Beat noise; optoelectronic oscillator (OEO); phase noise; sidemode suppressing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.897290
