logo
Home
about us
Company Profile
factory tour
quality control
products

Optical Fiber Patch Cord

MPO MTP Patch Cord

MPO MTP Cable

MPO Cassette Module

Fiber Optic Patch Panel

Fiber Optic Pigtail

FTTH Termination Box

Fiber Optic Connectors

Quick Assembly Connector

Fiber Optic Adapter

Fiber Optic Attenuator

Fiber Optic Loopback

Fiber Optic Cables

Fiber Optic Tools

Fiber Optic Transceiver

Fiber Optic Splitter

Fiber Optic WDM

Fiber Optic Splice Closure

Copper Patch Cords

Rj45 Patch Panel

RJ45 Ethernet Connector

Drone Fiber Optic

Switch And Socket
events
news
cases
contact us
quote
english
français
Deutsch
Italiano
Русский
Español
português
Nederlandse
ελληνικά
日本語
한국
العربية
हिन्दी
Türkçe
bahasa indonesia
tiếng Việt
ไทย
বাংলা
فارسی
polski
home
about us
products

Optical Fiber Patch Cord

MPO MTP Patch Cord

MPO MTP Cable

MPO Cassette Module

Fiber Optic Patch Panel

Fiber Optic Pigtail

FTTH Termination Box

Fiber Optic Connectors

Quick Assembly Connector

Fiber Optic Adapter

Fiber Optic Attenuator

Fiber Optic Loopback

Fiber Optic Cables

Fiber Optic Tools

Fiber Optic Transceiver

Fiber Optic Splitter

Fiber Optic WDM

Fiber Optic Splice Closure

Copper Patch Cords

Rj45 Patch Panel

RJ45 Ethernet Connector

Drone Fiber Optic

Switch And Socket
events
news
cases
contact us
quote
banner banner

News Details
Home > News >

Company news about Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?

Events

News

Cases
Contact Us
Mrs. Alice
sales03@newlightfiber.com
00-86-13534063703
wechat 86 13534063703
Contact Now

Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?

2025-07-31

Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?


The difference in fiber attenuation coefficient during OTDR testing of the same model is mainly due to various factors. Firstly, there is a positive and negative range for the nominal wavelength value of EXFO OTDR testing, with most models having a nominal value of ± 20nm, such as 1550nm.

 

Wavelength deviation may slightly affect the results. Because the attenuation coefficient of optical fibers is closely related to wavelength, the absorption and scattering characteristics of optical fibers are different at different wavelengths, and wavelength deviation can change the measured attenuation value.


The following table shows the changes in nominal loss and loss when the wavelength of the light source changes by 20nm.

latest company news about Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR? 0
Different testing environment conditions can also cause differences. Environmental factors such as temperature and humidity can affect the performance of optical fibers and the working state of OTDRs, thereby interfering with the measurement of attenuation coefficients. Furthermore, the quality and uniformity of the optical fiber itself are not completely consistent, and there may be local small defects or parameter fluctuations, which can also result in different attenuation coefficients obtained when testing the same type of OTDR at different positions. In addition, operational factors such as OTDR calibration and test parameter settings can also have a certain impact on the final attenuation coefficient test results.

banner
News Details
Home > News >

Company news about-Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?

Events

News

Cases

Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?

2025-07-31

Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR?


The difference in fiber attenuation coefficient during OTDR testing of the same model is mainly due to various factors. Firstly, there is a positive and negative range for the nominal wavelength value of EXFO OTDR testing, with most models having a nominal value of ± 20nm, such as 1550nm.

 

Wavelength deviation may slightly affect the results. Because the attenuation coefficient of optical fibers is closely related to wavelength, the absorption and scattering characteristics of optical fibers are different at different wavelengths, and wavelength deviation can change the measured attenuation value.


The following table shows the changes in nominal loss and loss when the wavelength of the light source changes by 20nm.

latest company news about Why is there a small difference in the attenuation coefficient of optical fibers when testing the same model OTDR? 0
Different testing environment conditions can also cause differences. Environmental factors such as temperature and humidity can affect the performance of optical fibers and the working state of OTDRs, thereby interfering with the measurement of attenuation coefficients. Furthermore, the quality and uniformity of the optical fiber itself are not completely consistent, and there may be local small defects or parameter fluctuations, which can also result in different attenuation coefficients obtained when testing the same type of OTDR at different positions. In addition, operational factors such as OTDR calibration and test parameter settings can also have a certain impact on the final attenuation coefficient test results.

86 13534063703
Quick link
Home About Us products News Cases Contact Us
Quick Contact

Address

Room C , floor 9 Wing Lee Building ,72-76 Wing Lok Street , Sheung Wan , HongKong

Tel

00-86-13534063703

86 13534063703
Our Newsletter
Subscribe to our newsletter for discounts and more.
Privacy Policy |  Sitemap  | China Good Quality Optical Fiber Patch Cord Supplier. Copyright © 2017-2025 NEW LIGHT OPTICS TECHNOLOGY LIMITED . All Rights Reserved.