Optical buffer employing four-wave mixing

Details Optical buffer employing four-wave mixing Optical buffer employing four-wave mixing

2006-12-27

2008-10-14

Sanghavi, Hemang (Department: 2874)

Optical: systems and elements

Optical frequency converter

Parametric oscillator

C359S326000, C359S341300

Reexamination Certificate

active

07436580

ABSTRACT:
An optical buffer employing Bragg scattering (BS), in which two pump signals are combined with an input (data) signal in a four-wave mixing (FWM) medium to frequency convert the input signal into an idler signal, which is applied to a dispersive medium, in which the idler signal propagates at a speed different from that of the input signal. By selectively turning on and off a pump, e.g., at bit-level switching rates, the BS-based frequency conversion can be selectively performed on particular bits in the input signal, e.g., to generate an output signal having reordered bits. A BS-based optical buffer can (1) be tuned to achieve different amounts of delay; (2) support single-channel or multiple-channel, classical or quantal communications; (3) be implemented with co-phased pump-phase modulation to suppress stimulated Brillouin scattering, while inhibiting spectral broadening of the idler signal; and (4) provide polarization independence using standard polarization-diversity techniques.

REFERENCES:
patent: 2004/0042060 (2004-03-01), McKinstrie et al.
patent: WO 2006102074 (2006-09-01), None
S. Radic; C.J. McKinstrie; R.M. Jopson; A.H. Gnauck; J.C. Centanni; A.R. Chraplyvy, “Multiple-band bit-level switching two-pump fiber parametric devices,” Photonics Technology Letters, IEEE , vol. 16, No. 3, pp. 852-854, Mar. 2004.
“Selective Suppression of Idler Spectral Broadening in Two-Pump Parametric Architectures,” by Stojan Radic et al., IEEE Photonics Technology Letters, vol. 15, No. 5, May 2003, pp. 673-675.
“Optical Cell Synchronisation in an ATM Optical Switch,” by M. Burzio et al., Proc. ECOC 1994, pp. 581-584.

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