Fiber Optic Characterization - CBM of America, Inc.

Fiber Optic Characterization

With the demand of Bandwidth increasing at a rapid rate, it is essential to guarantee that your optical infrastructure is constructed to support the progressing network data rates, and capacity needs. The CBM Fiber Optic Characterization Team has the experience, equipment, and knowhow to complete some of the most complex testing required for Long-Haul High-Speed Networks. The team is led by our in-house CFCE’s that understand the complexities to test extended wavelengths for CWDM and DWDM systems. Our Mission is to ensure that your fiber will perform as designed and to authenticate the overall span integrity.

Working with Live Equipment. Circuit Troubleshooting. 24/7 Availability.

Tests performed

OTDR: Bi-Directional
Bi-Directional OTDR (BiDi) is a test utilizing an Optical Time-Domain Reflectometer. This tests the fiber strand in both directions (A -> B, then B -> A) to identify key characteristics of the glass provided by the vendor along with any faults in the route, such as dirty fibers, bad splicing or macro bends.
Chromatic Dispersion
Chromatic Dispersion (CD) is a result of different colors or wavelengths in a light beam that travel through glass at different rates of speed. This causes the waves to arrive at their destination at slightly different times and to disperse. Compensation may be required so the fiber can deliver its maximum capacity.
Polarized Mode Dispersion
Polarized Mode Dispersion (PMD) is a form of dispersion where two different polarizations of light in a wavelength travel at different speeds due to imperfections causing spreading of optical pulses.
Spectral Attenuation
Spectral Attenuation (SAP) also referred to as Attenuation Profile (AP) provides the overall attenuation of the fiber. This test helps identify that the power levels are set accordingly at each end of the span (TX and RX), for each channel, because attenuation is not the same across the wavelength spectrum. Using the attenuation profile network engineers can fine tune each channel pump setting in a DWDM network using amplifiers.
Insertion Loss
Insertion Loss (IL) measures the amount of light lost between two connection points, or a span. It will look at the DB loss levels at each connector, splice, and or equipment inside of that span to ensure that there are no events that need to be remediated.
Return Loss
  • Return Loss (RL) measures power reflected back to the source when signal is transmitted over a fiber optic link at every point the fiber connection breaks i.e. connecting to another system, connecting to patch panel, or any other connection point along the transmission line.
  • High Return Loss means less power was reflected back to the source. This is a desirable outcome.
  • Low Return Loss means more power was returned back to the source. Remediation may be required.
  • Visual Inspection
    We perform an inspection of a connector end face at any given connection point. Our specialists use microscopes to ensure the fiber is clean of any debris, permanent scratches, mars or marks that could affect the performance of the fiber.
    OTDR: Trace analysis
    Visual representation or a graph with data about the measured span of fiber. Our team evaluates the results of all tests performed. We tailor all reports to the customer’s specifications and will make all remediation, attenuation, or dispersion recommendations in our final report.