Variable delay apparatus for optical signals

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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359140, 359127, 359326, 25022712, H04J 1408, H04J 1402, G02F 135, G01J 104

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active

059531428

ABSTRACT:
In order to reduce its switching time, the delay apparatus comprises a coupler and a multiplexer provided with n inlets set respectively to n distinct wavelengths. Inlets of the multiplexer are coupled respectively to outlets of the coupler via wavelength conversion apparatuses, and via delay lines all of which are different. Each conversion apparatus has an amplifying optical gate function and delivers to the corresponding inlet of the multiplexer a wave carried by the wavelength associated with said inlet. The invention also concerns apparatus for synchronizing channels of a wavelength multiplex using the variable delay apparatus. Application in particular to synchronizing optical packets in a switched optical network.

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F. Masetti et al, "Fiber Delay Lines Optical Buffer for ATM Photonic Switching Applications", Networking Foundation for the Future, San Francisco, Mar. 28-Apr. 1, 1993, vol. 3, Mar. 28, 1993, Institute of Electrical and Electronics Engineers, pp. 935-942, XP000419653.
F. S. Choa et al, A WDM Implementation of Optically Transparent Photonic ATM Switches, Proceedings of the Lasers and Electro-Optics Society Annual Meeting, Boston, Oct. 31-Nov. 3, 1994, vol, 1, Oct. 31, 1994, Institute of Electrical 7 Electronics Engineers, pp. 232/233 XP000510763.
J. B. Jacob et al, "Very High Bit Rate Optical Switch for ATM Applications", Communication et Transmission, vol. 16, No. 2, Jan. 1, 1994, pp. 5-14, XP000450570.

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