IL @ 1310 and 1550 Similar

Published: May 9, 2019

, Last updated: September 18, 2025

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IL @ 1310 and 1550 Similar

If made properly, the cable assembly will test about the same at either 1310 or 1550. 1550 Insertion Loss results are generally better by a few hundredths of a dB, due to, in part, its lower fiber attenuation. It’s normal that Insertion Loss values for a connector be ~0.01 - 0.05 dB better at 1550 than 1310.

READ THE BLOG: Insertion Loss Troubleshooting Tip: Singlemode 1310 vs. 1550

Additional resources from the FOC team include:

- Category Resource:
  - FOC Test Page
View the Glossary, Acronyms, Military Specifications for Connectors
Q&A Resource: email technical questions to AskFOC@focenter.com

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FOC Tips Fiber Optic Center has a team of technical experts and marketing strategists with decades of years in the field. This team contributes to the fiber, cable and specialty industries coverage through news, alerts, reports and general media information.

About Fiber Optic Center, Inc.

Fiber Optic Center, Inc., (FOC), is an international leader in distributing fiber optic components, equipment and supplies and has been helping customers make the best cable assemblies in the world for over two decades. Several areas of specialization and expertise, in which they are the industry leader, make them the preferred choice for many of the world’s fiber professionals. In these key technology areas, FOC is "at least as technical as the manufacturer" about the products they sell. Striving to "make the business part easy," they offer outstanding and personal customer service, low or no minimum purchase order values, and from-stock delivery on industry-leading products and technology. FOC is the industry connection to the most innovative optical products, technologies and technical experts who integrate their manufacturing knowledge and vast experience into customers' worldwide operations. @FiberOpticCntr

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