Optical (de)multiplexing of radio signals

Description of research

The research is focused on the realization of an optical heterodyning system utilizing two free running lasers oscillating with a frequency difference of ~10 GHz. Rare-earth-doped distributed feedback (DFB) lasers are of particular interest for this purpose due to their stable, single-mode, single polarization, narrow linewidth and low noise emission which is required for the signal processing. An optical distribution network (ODN) will distribute the optical power from the optical heterodyning to a series of photo-detectors. The output frequency of the detectors will be the difference frequency of the lasers. We investigate the stability (phase noise) of the optically generated LO in order to comply with LO stability of commercially available LNB (low noise block). The LO can be further stabilized by implementing a feedback loop (Optical phase lock loop) in the optical heterodyning system.

The critical parameters of the LO signal (i.e. power and phase stability, drift) will be calculated from optical heterodyning system and the properties of its components (i.e. lasers, ODN, photo-detectors, feed-back loop). This provides initial information to realize the LO signal to be employed in the LNB of a Ku band DVB-S reception system to replace the internally generated LO, with the aim of obtaining and integrated optical DVB‑S reception system by means of optical feed network in phased array antenna .

Advisor(s)

Dr. ir. C.G.H. (Chris) Roeloffzen, assistant professor

Duration

1^st July 2008 – 1^st July 2012

Project

SmartMix-MEMPHIS (Merging Electronics and Micro & Nano Photonics in Integrated Systems)

Funding institution

Agentschap NL

Strategic Research Orientation

DSN - Dependable Systems and Networks

Links to relevant web pages:

Homepage PhD

Homepage project

Pictures

	CTIT Home > Meet the PhDs > Rezaul Hoque Khan
Home CTIT symposium 2013 About CTIT News NIRICT Research Meet the PhDs Working at CTIT Internal Information Conferences Open Calls (updated May 3, 2013) Library and Videos Knowledge Transfer Links Sitemap Search	Optical (de)multiplexing of radio signals Description of research The research is focused on the realization of an optical heterodyning system utilizing two free running lasers oscillating with a frequency difference of ~10 GHz. Rare-earth-doped distributed feedback (DFB) lasers are of particular interest for this purpose due to their stable, single-mode, single polarization, narrow linewidth and low noise emission which is required for the signal processing. An optical distribution network (ODN) will distribute the optical power from the optical heterodyning to a series of photo-detectors. The output frequency of the detectors will be the difference frequency of the lasers. We investigate the stability (phase noise) of the optically generated LO in order to comply with LO stability of commercially available LNB (low noise block). The LO can be further stabilized by implementing a feedback loop (Optical phase lock loop) in the optical heterodyning system. The critical parameters of the LO signal (i.e. power and phase stability, drift) will be calculated from optical heterodyning system and the properties of its components (i.e. lasers, ODN, photo-detectors, feed-back loop). This provides initial information to realize the LO signal to be employed in the LNB of a Ku band DVB-S reception system to replace the internally generated LO, with the aim of obtaining and integrated optical DVB‑S reception system by means of optical feed network in phased array antenna . Advisor(s) Dr. ir. C.G.H. (Chris) Roeloffzen, assistant professor Duration 1^st July 2008 – 1^st July 2012 Project SmartMix-MEMPHIS (Merging Electronics and Micro & Nano Photonics in Integrated Systems) Funding institution Agentschap NL Strategic Research Orientation DSN - Dependable Systems and Networks Links to relevant web pages: Homepage PhD Homepage project Pictures