Enhanced Performance & Functionality of Tunable Delay Lines
Final rept. 5 Mar 2008-5 Jun 2012
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CONTRACTS AND GRANTS
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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.
- Electrical and Electronic Equipment