Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-10-31
1999-05-18
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359152, 359191, H04B10/24
Patent
active
059055863
ABSTRACT:
A system and method for providing two-way optical communications between a first location and at least one secondary location, wherein there is no light source available at the secondary location. In the system and method, the first location and the secondary locations are optically coupled by an optical fiber network. A laser light source is located at the first location and produces a first light signal that is transmitted to the secondary locations over the optical fiber network. At the secondary locations a portion of the first light signal is altered by selectively modulating the signal frequency. As a result, a second light signal is produced without the need of a second light source. The second light signal is then sent back to the first location over the optical fiber network where it can be isolated and interpreted as a data transmission.
REFERENCES:
patent: 5267074 (1993-11-01), Kluitmans et al.
patent: 5408350 (1995-04-01), Perrier et al.
Frigo et al., "A Wavelength-Division Multiplexed Passive Optical Network With Cost-Shared Components", IEEE Photonics Technology Letters, vol. 6, No. 11, Nov. 1994.
Lucent Technologies - Inc.
Negash Kinfe-Michael
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