Title :
Coherent optical communications: opportunities & challenges
Author_Institution :
MIcrosystems Technol. Office, Defense Adv. Res. Projects Agency, Arlington, VA, USA
Abstract :
This paper explores the opportunities and challenges of developing coherent optical transceiver and modem technology and identifies digital and analog application areas of interest. Also, synchronous versus asynchronous detection, heterodyne versus homodyne detection, and on-off keying (OOK) versus complex signaling formats (e.g. Mary PSK or QAM) will be assessed from a system performance/hardware complexity perspective. The laser, modulator, balanced receiver and associated high-speed electronics challenges will be identified. This paper will also outline some of the current limitations of analog intensity modulation direct detection (IMDD) optical transmission systems and point out increasing opportunities for the use of coherent analog modulation and detection technology.
Keywords :
amplitude shift keying; heterodyne detection; homodyne detection; intensity modulation; light coherence; modems; optical communication; optical modulation; optical receivers; optical transmitters; phase shift keying; quadrature amplitude modulation; transceivers; Mary PSK; OOK; QAM; analog intensity modulation direct detection; asynchronous detection; coherent optical communications; coherent optical transceiver; heterodyne detection; homodyne detection; modem; on-off keying; synchronous detection; High speed optical techniques; Intensity modulation; Modems; Optical fiber communication; Optical mixing; Optical modulation; Optical receivers; Phase shift keying; Quadrature amplitude modulation; Transceivers;
Conference_Titel :
Lasers and Electro-Optics Society, 2004. LEOS 2004. The 17th Annual Meeting of the IEEE
Print_ISBN :
0-7803-8557-8
DOI :
10.1109/LEOS.2004.1363585
