Day: March 27, 2019

Functions of a Cladding Power Stripper and Its Market

The configuration of a particular DCFLS (double cladding fiber laser system) is generally schematically arranged. The fiber is cladding-pumped by high power diode stacks which then spread and amplify the pump light. High reflector and output coupler fiber Bragg gratings are usually etched on the fiber. It is best for a system that has all light signals transmit in the core and inner cladding where all pumping light is core-absorbed.

But, there always some unwanted light exists in reality. CPS, also known as cladding power stripper is an important component of the fiber optic systems which is used to remove this typical unwanted light and distribute the heat, initiated by that unwanted light.

The unwanted light spreading all over the cladding actually consists of the main three parts mentioned below.

Amplified spontaneous emission (ASE)

Residual pump light at the gain fiber’s end

Core light getting leaked or reflected inside the cladding

Prior to the output of light, the unwanted light has to be eliminated so that it would use unused space optics of a complicated laser system. The unwanted light gets converted into heat and this heat may lead to heated up optics and the core light would not be able to focus nicely. Moreover, the heat may also burn or damage the system’s important components or deteriorate the function when multiple systems are combined together for greater efficiency.

In double cladding fiber laser systems, the unwanted optical power and light must be reduced so that the output light gains higher beam quality. Several kinds of research have been done to strip that light from the cladding. Removing the originally there fluoroacrylate jacket and coating the fiber with a high index polymer can literally strip residual light of more than a hundred watts. Fabrication using a suitable etching method successfully cleared the test and stated that it offers good behavior instability so that it can be used in the applications with higher power laser systems.

All such researches successfully eliminated the unwanted light and the crucial work after that light gets converted into heat. Some of the researches also provided a cooling method of their tests, including cooling water based plate and air cooling. But because the output power of DCFLS increases, the traditionally used cooling methods could not stand the harsh heat.

Apart from there functions, there are manufacturers who can provide you with cladding power stripper of all kind of double Clad fiber where cladding power can reach up to 500W. If you couldn’t find a standard CPS that fulfills your needs, you can provide your desired specification to a reliable manufacturer and get a quote for a custom CPS. Requests for custom fiber type, operation handling power operation, varying wavelengths, and other specific requirements will be addressed quickly.

How to Buy Optical Isolator: All You Need To Make the Right Decision

Isolators are crucial component used in optical communication applications to prevent unwanted back reflections. Most of isolators use faraday magnetooptic effect to polarize the light.  Choosing the right type seems to be important. And this is what we will be talking about through the blog. You will learn everything needed to make the right decision.

What is optical isolator?

According to Techopedia, “An optical isolator is a passive magneto-optic device that makes travel of light unidirectionally.”   The isolator which works on the principle of Faraday Effect is a wide range of communication applications to prevent unwanted feedback to the system.

Also, known by different names such as optoisolators, optocouplers and photocouplers, an optical isolator for polarization is made of different components such as a Faraday rotator with magnet, input polarizer and output polarizer.

The input polarizer which acts as a filter is meant to allow linearly polarized light into the rotator. The rotator then rotates the polarization of the input light by 45 degrees and is allowed to exit through the output polarizer. The energy is either absorbed or reflected depends on the polarizer type. There are two types of polarizer: high power and low-power polarizers.

Optical isolators are also grouped into tow two categories – polarization-dependent isolators and polarization-independent isolators.  The former uses input and output polarizers while the later uses input and output birefringent wedges. But both use a Faraday rotator.

Polarization sensitive Optical Isolators are used in a wide range of applications including laser applications where they are used to prevent unwanted feedback into the laser source. The use of isolators prevents the coherence of the laser from affective any damage to the diode itself. Because. The feedbacks it provides are capable of frequency shift, noise, mode hopping or amplitude fluctuation.

The isolators play a vital role in achieving stable laser diode operation. In high speed optical fiber transmittance amplifiers and routes, they are regarded as the most crucial device as they eliminate the adverse effect of return beams

Now you are far better equipped with the information you need to make a decision regarding the selection of isolator. There are many dealers that provide Polarization sensitive optical Isolators in China. But you should buy from the one that you think is reliable and that provides a better after sale support. You can also explore a variety of Polarization sensitive optical Isolators online.