Invention Grant
- Patent Title: Method and apparatus for operating variable optical attenuator by modulating the attenuation thereof
- Patent Title (中): 通过调制其衰减来操作可变光衰减器的方法和装置
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Application No.: US10618604Application Date: 2003-07-15
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Publication No.: US07072561B2Publication Date: 2006-07-04
- Inventor: Gordon Bruce Scarth , Robert Michael Bierman , Steve Joseph Grabner
- Applicant: Gordon Bruce Scarth , Robert Michael Bierman , Steve Joseph Grabner
- Applicant Address: CA Kanata
- Assignee: Tropic Networks Inc.
- Current Assignee: Tropic Networks Inc.
- Current Assignee Address: CA Kanata
- Agent Victoria Donnelly
- Main IPC: G02B6/00
- IPC: G02B6/00
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.
Public/Granted literature
- US20050019032A1 Method and apparatus for operating variable optical attenuator by modulating the attenuation thereof Public/Granted day:2005-01-27
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