What are the dynamic characteristics of Polarization Maintaining Fused Coupler?

---

 Polarization maintaining fused coupler is
covering a wide range of optical devices that may have been used or not,
includes optical splitters, optical combiners, and couplers. The couplers are
operating in different applications that require other than specific
connections. The fused coupler is used to split optical signals between two
fibers into one and they are constructed by fusing & tapering the fibers
together. This method is used for creating a simple and rugged method of
splitting. Polarization maintaining fused coupler is built using unique fusing
technique and polarization maintains fiber.

 

What is the main use of PM fused couplers?

 

The PM fused coupler is the type of
component that is allowing the redistribution of optical signals. The device is
able to distribute the other optical signals from one fiber among two or more
fibers. The coupler is having the ability to combine the optical signals from
two or more fibers into a single fiber. 
The input signal is not directly transmitted from one fiber to another,
but divided among the output ports.

 

The operating wavelength of fused PM
Splitter is up to ±20 nm for 1550 nm region devices. If you are looking for a
fused coupler for operations within the standard bandwidth or splitter, it is
best to order a standard center wavelength. There are companies manufacturing
the polarization maintaining fused coupler. The manufactures use unique fusing
techniques and PM fiber to build couplers. They have the features of excess
loss, small size and high polarization extinction ratio.

 

The PM fused coupler is split into high
power linearly polarized light into multiple paths without perturbing the line.
It is also used as the power tap to monitor signal power in a PM fiber system
without disturbing the linear SOP of light propagating in the PM fiber.

 

Listed below are the features of PM fused
coupler –

 

Available for slow or fast axis operation

Compact in-line package

High extinction ratio

Low insertion loss

High stability and reliability

The fused coupler is used in applications
like fiber optic instruments, fiber amplifiers, fiber sensors, coherent
detecting, and research. Optical couplers are important devices in optical
communication and there are various types of optical couplers with different
transmission characteristics. Fused PM
splitters have a wide variety of options with the standard
configuration of 1×2, 2×2, 1×3 (monolithic) and 1×4 (compact cascaded). The
couplers are configured and built in-line with the industry requirement.