Add - drop multiplexer

Details Add - drop multiplexer Add - drop multiplexer

1993-04-22

1996-04-09

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359120, 359121, H04B 1020

Patent

active

055067107

ABSTRACT:
An add-drop multiplexer includes a first photodector (14), which receives informations in optical form, some of which are to be supplied to users addressees or recipients chosen from among N users addressees or recipients associated with the wavelengths L1, . . . , LN, whilst the other informations form an output flow at wavelength LO, a second photodetector (16) receiving in optical form informations to be inserted in said flow, a tunable source (18), which converts the signals from the first photodetector into optical signals of wavelengths chosen from among LO, L1 . . . LN under the control of control unit (20) and as a function of their destination, another source (22), which converts the signals from the second photodetector into optical signals of wavelength LO, a coupler (24) connecting the sources to N+1 filters (f0 . . . , f3) only respectively permitting the passage of LO . . . LN. Application to optical telecommunications.

REFERENCES:
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patent: 5105292 (1992-04-01), Le Roy et al.
patent: 5353145 (1994-10-01), Le Coquil et al.
Journal of Lightwave Technology, vol. 7, No. 11, Nov. 1, 1989, pp. 1798-1805, N. Fujimoto, et al., "Photonic Highway: Broad-Band Ring Subscriber Loops Using Optical Signal Processing".
IEEE Transactions On Communication Technology, vol. 37, No. 6, Jun. 1, 1989, pp. 645-648, E. Arthurs, et al., "A Broadband Optoelectronic Packet Switching System".
Proceedings IEEE International Conference On Communications, vol. 2, Jun. 11, 1989, pp. 734-738, G. R. Hill et al., "Wavelength Routing For Long Haul Networks".
A Novel Distributed Photonic Switch, Fiorretti et al, "Proceedings of the international switching symposium 28 MEI", Jun. 1, 1990 p. 11.
IBM Technical Disclosure Bulletin vol. 31 No. 11 Apr. 1989.
IBM Technical Disclosure Bulletin vol. 32 No. 10B May 1990.
IBM Technical Disclosure Bulletin vol. 37 No. 4B Sep. 1989.

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