Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-12-31
1999-07-27
Mullen, Thomas
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359134, 359160, 359187, H04J 1400
Patent
active
059300132
ABSTRACT:
A gain-switched optical selector is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical selector of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.
REFERENCES:
patent: 5181134 (1993-01-01), Fatehi et al.
patent: 5491581 (1996-02-01), Roba
patent: 5633961 (1997-05-01), Kirkby et al.
patent: 5742416 (1998-04-01), Mizrahi
patent: 5745274 (1998-04-01), Fatehi et al.
Fatehi Mohammad T.
Knox Wayne Harvey
Lucent Technologies - Inc.
Mullen Thomas
Murgia Gregory J.
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