Title :
Millimeter-wave modulated optical signal generation with high spectral purity and wide-locking bandwidth using a fiber-integrated optical injection phase-lock loop
Author :
Johansson, L.A. ; Seeds, A.J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK
fDate :
6/1/2000 12:00:00 AM
Abstract :
We report the first experimental demonstration of millimeter-wave modulated optical signal generation by an optical injection phase-lock loop. A 36-GHz signal was generated by combining optical sideband injection locking with optical phase-lock loop techniques for two fiber-coupled DFB lasers. Single sideband noise spectral density of -92 dBc/Hz at 10 kHz offset, and phase-error variance lower than 0.005 rad/sup 2/ in a 100 MHz bandwidth were measured. The locking bandwidth exceeded 30 GHz.
Keywords :
distributed feedback lasers; microwave photonics; optical fibre communication; optical fibre couplers; optical modulation; optical phase locked loops; semiconductor lasers; 100 MHz; 30 GHz; 36 GHz; GHz signal generation; fiber-coupled DFB lasers; fiber-integrated optical injection phase-lock loop; high spectral purity; kHz offset; locking bandwidth; millimeter-wave modulated optical signal generation; optical injection phase-lock loop; optical phase-lock loop techniques; optical sideband injection lockin; phase-error variance; single sideband noise spectral density; wide-locking bandwidth; Bandwidth; Fiber lasers; Injection-locked oscillators; Laser noise; Millimeter wave technology; Optical modulation; Optical noise; Phase modulation; Phase noise; Signal generators;
Journal_Title :
Photonics Technology Letters, IEEE
