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How to Identify Single Mode and Multi Mode Fibre Optic Cable

Due to the increase in the demand for these cables, it has become visible that these cables are steadily replacing copper wire as an appropriate means of communication signal transmission. Nowadays, It’s been so confusing to identify the type of cables or the wires that you are using in your office, home or anywhere.

One of the biggest confusion is between the fibre cables i.e. single-mode and multi-mode optic cable. To make it easy to identify, here are some methods to make a difference in both the cables, but before that let’s first know the basic summary of these fibre cables.

Single Mode and Multi Mode overview:

Single mode fibre optic cable enables the one type of light mode to be propagated at a time. Whereas, multimode fibre optic cable means the fibre can propagate multiple modes. There is a difference in both the cables which lies in their core diameter, wavelength, the light source, colour, and bandwidth. 

1. Diameter: 

Single Mode fibre cable has a smaller core diameter than the multimode optic fibre cable. The typical core diameter is 9µm even if there are others available. And multimode fibre core diameter is 50µm and 62.5µm. Since single-mode has a small diameter, it has a low light gathering capacity as compared to the multimode fibre cable.

2. Wavelength & Light Source:

As multimode has a larger core diameter that’s why it has more wavelength and light source. The light source determines the wavelength. Lasers can be tuned to send specific wavelengths down the fibre core. And since each wavelength takes a different path down the core of the fibre, some fibre types are better suited for some wavelengths. As you will see, Multimode Fiber transports light signals at different wavelengths than Single-Mode Fiber.

3. Colour:

Another difference between these cables is the colour  which can help to identify these cables. Usually, yellow is used for single-mode cable and orange or aqua is used for multimode cable. 

4. Bandwidth:

Multimode fibre bandwidth is limited by its light mode and the maximum bandwidth. While single-mode fibre bandwidth is unlimited theoretically as it allows one light of mode to pass through at a time.

So, these are some of the differences between the single-mode and multimode optic fibre cable and we make sure that they will definitely help in making a difference in these two cables easily.


Published by fruitycables

We are a leading networking solution provider that offers a wide range of wall cabinets, data cabinets, floor standing server cabinets, & many other cables along with installation services.

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