Title :
Monolithically Integrated Photonic Heterodyne System
Author :
Ponnampalam, Lalitha ; Fice, Martyn J. ; Pozzi, Francesca ; Renaud, Cyril C. ; Rogers, David C. ; Lealman, Ian F. ; Moodie, David G. ; Cannard, Paul J. ; Lynch, Colm ; Johnston, Lilianne ; Robertson, Michael J. ; Cronin, Richard ; Pavlovic, Leon ; Naglic,
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, London, UK
Abstract :
This paper presents the results from the first monolithically integrated photonic heterodyne system that allows the two optical sources to be mutually phase locked by locking to an external optical reference. High-spectral-purity signals of up to 50 GHz have been demonstrated from this first fabricated device, where the tuning range was limited by losses in the input waveguide. Successful phase locking was accomplished through short signal propagation delay of less than 2 ns achieved by monolithic integration and custom-made fast loop electronics. The approach can be extended to generate signals at >; 1 THz.
Keywords :
integrated optics; light propagation; microwave photonics; optical losses; optical tuning; custom-made fast loop electronics; high-spectral-purity signals; monolithically integrated photonic heterodyne system; mutually locked phase; optical sources; optical tuning; phase locking; signal propagation delay; Delay; Distributed Bragg reflectors; Fiber lasers; Gratings; Laser tuning; Optical waveguides; Waveguide lasers; Millimeter-wave signal generation; THz signal generation; monolithic integration; optical phase-lock loop; photonic mixing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2158186
