Accession Number : ADA517049


Title :   Phase-Locked Optical Generation of mmW/THz Signals


Descriptive Note : Final rept. 27 Jun 2008-26 Nov 2009


Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING


Personal Author(s) : Johansson, Leif ; Coldren, Larry ; Rodwell, Mark


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a517049.pdf


Report Date : Nov 2009


Pagination or Media Count : 66


Abstract : In this report, an effort to demonstrate a highly efficient millimeter-wave (mmW) modulated optical source is summarized. This is achieved using an integrated heterodyne optical phase-locked loop (OPLL) built from monolithically integrated photonic and electronic circuits (ICs). The close integration of these ICs enables low feedback latency so that relatively wide linewidth semiconductor lasers can be used. This demonstration is a key step toward realizing compact practical OPLL mmW sources incorporating data modulation. The heterodyne frequency is ultimately limited by photodetector bandwidths, and the data rate is limited by the heterodyne frequency. It will be shown that the overall performance of the heterodyne OPLL is sufficient to demonstrate the feasibility of and a direct path towards multilevel modulation at 100Gbps data rates of a mmW carrier frequency in the 100GHz to 300GHz range. This successful demonstration of the OPLL heterodyne source is a critical demonstration required to allow electronic and photonic components, now developed for advanced future fiber optic communications systems, to be directly adopted for high capacity optical feeds to enable 100Gbps wireless links.


Descriptors :   *MILLIMETER WAVES , *PHASE LOCKED SYSTEMS , *INTEGRATED CIRCUITS , SEMICONDUCTOR LASERS , PHOTODETECTORS , CARRIER FREQUENCIES , BROADBAND , PHOTONS , EFFICIENCY , HETERODYNING , FIBER OPTICS


Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE