Month: May 2018

High Power Faraday Rotator and Isolator: Key Features and Top Benefits

From multi-level laser amplifier, ring laser to the optical modulator, the Faraday rotator and isolator is a key component in a wide range of devices used in diverse verticals today. It plays a vital role in how these devices perform. Or in other words, the efficiency of these devices largely depends on faraday rotator and isolator. As to help you why you should invest in those, we will discuss those two vital components from every perspective – keys features, applications, and benefits.

What are faraday isolator and rotator?

The Faraday rotator is a polarization rotator that works on the Faraday Effect, and this is a reason the component is called Faraday rotator.  The component also based on magnetic effect. It works because one polarization of the light received is in the ferromagnetic resonance with the object which increases the phase velocity more than the other.

 Faraday rotator changes the polarization state of light that is run through it. As a result, the output polarization state is caused to move around by 45 degrees with respect to the input polarization.  When combined with mirror, the light reflected starts rotating by another 45 degrees, and this all results in a 90-degree rotation.  Moreover, the polarization handedness is reversed by the mirror, which results in a reflected polarization orthogonal to the original polarization. This is of immense importance if used in interferometers as the polarization changes through the fiber and is canceled out on the return journey.

While an optical isolator also known as an optical diode is an optical component that allows the transmission of light in only one direction.  The use of this component is meant to prevent unwanted feedbacks into the device called optical oscillator such as a laser cavity.

The component comes in various series. The high power series include in-line type, beam expanded and fiber-in and free space out isolators.  For example, 1064nm High Power Free-Space Isolator belongs to free space in and out isolator which is widely used in fiber laser and instrumentation applications.

Prime Applications

These two components have a slew of applications ranging from Multi-level laser amp to a number of instrumentation applications. It makes no sense discussing each and every use of those components here in the blog post. Instead, we will try to throw light on some of the most crucial applications. Below are some of their crucial uses.

  • Multi-level laser amplifier
  • Ring laser
  • Erbium-doped fiber amplifier
  • Seed injecting laser
  • Optical modulator

Top benefits that make these components ideal choice

No matter what you do as a business outfit, to sustain and get an edge in this hyper-competitive world, you must work towards cutting on unwanted cost, follow highest standards in your domain, and provide top quality for low cost. And this is what Faraday rotators and isolators are all about. Some of the top benefits the components offer include low insertion loss, low cost, RoHS compliant, high reliability, high power handling and high isolation.

CWDM Mux/Demux – Easy flow of signals across the optical fiber

The Coarse Wavelength Division Multiplexing (CWDM) is the method of combining the multiple signals on laser beams for transmission along fiber optic cables. The number of channels is less in CWDM rather than in standard Wavelength Division Multiplexing (WDM). A CWDM MX DEMUX is used for increasing the current fiber cable capacity by transmitting multiple wavelengths, typically up to 18 separate signals over one fiber. It is a passive device, very reliable and simple to use.

What is the basic difference between a MUX and DEMUX?

A Multiplexer (or MUX) is a device that is selecting one of several analog or digital input signals into a single line. The data distributor is known as Demux for short and it is the exact opposite of the multiplexer. The multiplexer is a device that is taking a single input signal and selecting one of the data-output-lines to the single input.

CWDM is supporting up to 18 wavelength channels transmitted through a fiber at the same time. The different wavelengths of channels are 20nm apart in CWDM and DWDM support 80 simultaneous channels with each channel only 0.8nm apart. CWDM is the most efficient solution for shorter distances of up to 70 kilometers. CWDM also tends to be limited to supporting 8 channels for the distance between 40 and 70 kilometers. But, unlike CWDM, DWDM can be amplified and used for transmitting data along long distances.

CWDM components are cheaper and popular than DWDM. Both the solutions are available as an active or passive system and DWDM is the technology for greenfield installations. In CWDM, the energy from the laser is spread over a larger range of wavelengths as compared to the DWDM system. The tolerance in a CWDM laser is up to more or less 3nm. But the tolerance is tighter in a DWDM system. The maximum realizable distance between the nodes is smaller with CWDM.

Details about CWDM Mux/Demux System Installation Components

The basic ingredients of a CWDM MUX-DEMUX system comprise a Local unit, a Remote unit, and the CWDM MUX DEMUX module. A chassis should be installed first to hold the module and install CWDM SFP transceivers in the switch to connect a CWDM MUX DEMUX module to a switch. Also, the energy from the lasers in a CWDM system is spread out over a larger range of wavelengths.

Transmission is the vital factor in transferring signals along the optical fiber. Get the best CWDM Mux/Demux price in China as the production cost is less in the place. The orders can be made online easily and get the transmission object now at the most effective pricing.