Microsecond Parametric Optical Delays

We present the first wavelength-preserving, tunable all-optical delay lines surpassing the microsecond range. Experimental demonstrations with 10-Gb/s data streams, tunable over 1.83 s, as well as 40-Gb/s data tunable over 1.56 s, characterized by a record delay-bandwidth product of 78000, are presented and analyzed in detail. Index Terms ­ Fiber optic communications, optical delay, parametric amplifiers, wavelength conversion, dispersion.