A launch box is a passive optical component, complementary to OTDRs (Optical Time Domain Reflectometer) for the testing of a fiber optics link. It is made of a coiled optical fiber and it helps eliminate the infamous OTDR “dead zone area”. Simply put, it is vital to the success of a fiber OTDR measurement.
These boxes are the cables placed between the OTDR and the near-end patch panel serving two key purposes:
1) to detect reflections and
2) to identify loss measurement.
The ‘blinding’ of OTDRs for short periods of time come from reflections caused by connector interfaces. A “dead-zone” is the period of time it takes for an OTDR to recover from the ‘blindness’. During a dead-zone period, OTDRs are unable to identify between bends, other connectors, breaks, or shatters. A long cable is necessary to detect the reflection within the dead-zone.
There must be sufficient measurable backscatter, before and after the inter-connection, to measure the optical loss on an OTDR trace.
An OTDR can be prevented from measuring the relative loss through both near-end and far-end patch panel connections with the lack of a dead-zone box. In its absence, there is no measurable backscatter outside the fiber link under test.
On our website, we have seven options under theAFL Fiber Ring products found here: http://bit.ly/2ba8jVy .
- Fiber Optic Center AskFOC: Issues on MT polishing. I am getting “Y” radius less than 100 - June 9, 2017
- Fiber Optic Center AskFOC: In need of information on cleaning and repairing TOSA/ROSA devices - May 30, 2017
- Fiber Optic Center AskFOC: Does FOC have any experience or recommendations in using microwaves to cure fiber optic epoxies? - May 11, 2017
- From the Industry: AFL Attains ISO 9001:2015 Certification - May 9, 2017
- Why isn’t there one standard polishing procedure? - May 8, 2017
- FOC’s vintage sign at 23 Centre Street: Honoring history, restoration and new beginnings - May 4, 2017
- Fiber Optic Center AskFOC: What are the probable causes of light leakage from ferrule barrel? Is it while insertion of fiber into ferrule or while stripping fiber with Fujikura stripper? - May 4, 2017
- From the Industry: Light Brigade Offering Fiber Optics 1-2-3 Training Course In New Bedford, MA - May 2, 2017
- Why use AngstromLap lapping film over other manufacturers? - May 1, 2017
- From the Industry: Viavi Solutions introduces the market’s most compact OTDR solution for DWDM or Hybrid CWDM/DWDM network testing - May 1, 2017