Optical Fiber Testing: Ensuring Quality and Troubleshooting with Testing Devices, Slides of Computer Science

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Optical Fiber Testing

Overview

1. The need for testing

2. Testing devices

3. Problems with today’s equipment.

4. Cost of equipment

Types of Testing

• End to End loss testing

• Cable Commissioning

• Splice and connector optimization

• System ORL characterization

• Dispersion verification and wavelength

measurements

End to End Testing

• Both units must be referenced with the test jumpers
• Confirm power source is connected to test fiber
• Reading is only accurate if both units at same wavelength

Reflectance

• Do to glass air interface
• Rayleigh backscattering
• Pr = Reflected Power
• Pi = Incident Power

Reflectometers

• Two types:

1. Optical Time Domain Reflectometer

• Measures reflectance and ORL
• Can characterize connectors and mechanical splices
• Accuracy of plus/minus 2dB

Difficulties

• Light source and power meter must be

referenced at the same point.

• Wavelength of light source and power meter

must be the same.

• Jumpers to test equipment can wear down

Leading Manufactures

Agilent/HP Tektronix

Fluke Advantest

NetTest Fluke Networks

Cal Instruments

Noyes Optical Light source

Price range: $375.00 to $

1000 to 4000+ for Laser source

Noyes Optical Power Meter

Power measurements at 850, 1300, 1310,1550, and 1625 nm

Full fiber documentation via Windows TM 95/98/NT 4.0 data analysis software

Singlemode or multimode dual-wavelength testing

Noyes OPM 6 & OLS 6 Optical Power Meter & Light Sources Price range: $500 - $