Accession Number : ADA570141


Title :   Enhanced Performance & Functionality of Tunable Delay Lines


Descriptive Note : Final rept. 5 Mar 2008-5 Jun 2012


Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CONTRACTS AND GRANTS


Personal Author(s) : Willner, Alan E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a570141.pdf


Report Date : Aug 2012


Pagination or Media Count : 144


Abstract : We demonstrated dramatic enhancements in the performance and functionality of tunable optical delay lines. We used tunable wavelength conversion combined with inter-channel chromatic dispersion and intra-channel dispersion compensation to achieve continuously tunable optical delays. Extremely long delays at very high bit-rates were demonstrated with minimal data distortion. We demonstrated delays for different data modulation formats, including on-off-keying and spectrally efficient DQPSK (differential -quadrature-phase-shift-keying .We used: (i) low dispersion slope, highly nonlinear fiber to achieve wide-bandwidth wavelength conversion based on four-wave mixing and (ii) a highly dispersive element with low dispersion slope to introduce a large linear change in time delay as a function of wavelength. Since the dispersive element also introduces data-destroying intra-channel chromatic dispersion, we made use of spectrally efficient DQPSK which increased the tolerance to all orders of dispersion. We demonstrated that tunable optical delays can potentially be used in a dynamic, reconfigurable, and heterogeneous optical system.


Descriptors :   *DELAY LINES , BROADBAND , CONVERSION , EFFICIENCY , FOUR WAVE MIXING , MODULATION , NONLINEAR OPTICS , OPTICAL EQUIPMENT , PERFORMANCE(ENGINEERING) , PHASE SHIFT KEYERS , SIGNAL PROCESSING , SLOPE , TELECOMMUNICATIONS , TOLERANCE


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE