Method and apparatus for operating variable optical...

Details Method and apparatus for operating variable optical... Method and apparatus for operating variable optical...

2006-07-04

2006-07-04

Pak, Sung (Department: 2874)

Optical waveguides

Accessories

Attenuator

C398S038000

Reexamination Certificate

active

07072561

ABSTRACT:
A method and apparatus are disclosed for operating an eVOA by modulating its attenuation. If an optical signal power is below a loss of signal (LOS) power threshold the eVOA attenuation is set to a maximum attenuation and then, periodically and quickly decreased and increased in steps while checking for the presence of optical signals above the LOS power threshold. The method is also used for operating a multiplicity of eVOAs while minimizing the risk of damage to optical network equipment.

REFERENCES:
patent: 6600594 (2003-07-01), Ko et al.
patent: 2004/0109662 (2004-06-01), Scarth et al.
patent: 2004/0165857 (2004-08-01), Xiao et al.
patent: 2004/0197105 (2004-10-01), Khatana et al.
patent: 2005/0025409 (2005-02-01), Welch et al.

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