Introduction; Orl-85/Orl-85P Return Loss Meter - Viavi SmartClass ORL-85 Operating Manual

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ORL-85/ORL-85P Return Loss Meter

The SmartClass™ Fiber ORL-85 (optical return loss meter) is a
high-performance, easy-to-use instrument for field, laboratory,
and production use. It combines three different functions in one
field-optimized instrument, including an optical return loss
meter, an optical power meter, and a four times wavelength light
source.
Up to four lasers with built-in optical isolators are combined to
the angled physical contact (APC) optical output, providing easy
return loss measurements. High-precision fiber couplers and an
automatic zeroing function guarantee outstanding
measurement accuracy.
The light source function enables measurements at four
wavelengths simultaneously by using sophisticated digital signal
processing.
Optical Return Loss Meters
Several methods can be used to measure Optical Return Loss.
The most common methods use either an optical continuous
wave reflectometer or an optical continuous wave reflectometer.
Optical Continuous Wave Reflectometer (OCWR)
The optical continuous wave reflectometer launches light into
the fiber under test and collects backscatter information as well
as Fresnel reflections. The light received by the optical
continuous wave reflectometer corresponds to the reflected
power according to the injected light.
Fig. 1 Patch cord microscope components
ORL-85/ORL-85P