Copper, Fiber or Wireless?

While discussions of which is better – copper, fiber or wireless – has enlivened cabling discussions for decades, it’s becoming moot. Communications technology and the end user market, it seems, have already made decisions that generally dictate the media. The designer of cabling networks, especially fiber optic networks, and their customers today generally have a […]

Optical Cable

Understanding Zero Water Peak Fiber

For several years, the optical fiber user community has been rapidly shifting from traditional single-mode fibers to new “Full Spectrum” single-mode fibers meeting the International Telecommunications Union (ITU-T) G.652D specification. These Reduced Water Peak (RWP) fibers are considered Full Spectrum because the reduction of loss in the water absorption spectral region (the E band) allows […]

Optical Cable

Understanding Polarization Mode Dispersion

Polarization Mode Dispersion (PMD) is a serious problem that can limit distances and data rates in a single-mode optical fiber system. PMD is a time varying quantity that degrades system bandwidth and is costly to mitigate. It affects network reliability and is becoming more evident as network speeds increase. The impact of PMD was first […]

Optical Cable

Understand Fiber Attenuation

Attenuation is the reduction or loss of optical power as light travels through an optical fiber. The longer the fiber is and the farther the light has to travel, the more the optical signal is attenuated. Consequently, attenuation is measured and reported in decibels per kilometer (dB/km), also known as the attenuation coefficient or attenuation rate. Attenuation varies depending […]

Test and Measurements

Measuring Bandwidth of 10G Laser-optimized Multimode Fiber

1. The traditional Overfilled Launch (OFL) method of measuring bandwidth in multimode fiber has been replaced by new, more advanced techniques. The advent of 850 nm VCSEL light sources and 10G laser-optimized 50 µm multimode (OM3) fiber has enabled cost-effective 10G transmission for short reach enterprise applications. Unlike LEDs, VCSELs don’t light up the entire […]

Optical Cable

Fibre attributes explaination from ITU

This article is for beginners to learn basic concept appeared in fiber specifications Only those characteristics of the fibre providing a minimum essential design framework for fibre manufacture are recommended in this clause. Ranges or limits on values are presented in the tables of clause 7. Of these, cable manufacture or installation may significantly affect […]

FTTH Network

Fiber and Bandwidth

Q: What is bandwidth? a: In a network, bandwidth (what engineers call bitrate) is the ability to carry information. The more bandwidth a network has, the more information it can carry in a given amount of time. Networks with high bandwidth also tend to be more reliable because fewer bottlenecks disturb the flow of information. […]

Test and Measurements

Decrease of the Link PMD by Fiber Exchange and Investigation of the PMD Distribution along Buried Optical Fibers with a POTDR

I. INTRODUCTION The fiber network of most network operators generally comprises a heterogeneous mixture of fibers and cables, produced by different vendors over many different years. Thus, there can be a correspondingly important variation in the physical properties of deployed fibers. Along with fiber attenuation and chromatic dispersion, polarization mode dispersion (PMD) is an important […]

Optical Cable

Top 5 Considerations for choose optical Fiber

In current OSP (Outside Plant) networks, there will involve both SM (Single Mode) and MM (Multimode) fiber. however, because MM is with short transmission distance, so current OSP network is main about SM fiber and operating at wavelengths of 1310nm and 1550nm, (WDM System, wavelengths division multiplexing systems with more wavelengths in the spectrum). In […]

Cable Management Optical Cable

Fibre Installation Guidelines

Nowadays, fiber cable are installed world wide, even through there is many protection for optical cable, however, it is still easily damaged because the hair like bare fiber is easy to break. to avoid fiber break, and ensure the fibre cable are correctly installed with good optical performance. please read the following guide lines carefully […]