About fiber optic attenuator technique

Fiber optic attenuator technique data
UPC type return loss 50dB or greater
APC type return loss 60dB or greater
Working wavelength 1310nm or 1550nm

About fiber Optic Attenuator
Sometimes in the fiber optic network, people need to reduce the fiber optic light power level when it is transmitted from one equipment to another; fiber optic attenuator is a device for this function. The unit “dB”, usually from 1dB fiber optic attenuator to 20dB fiber optic attenuators, measures fiber optic attenuation level. This is called a fixed value fiber optic attenuator, each piece of the fiber attenuator the attenuation rate is fixed. There are female to female and female to male type attenuators, the latter is also called a plug type attenuator.

Adustable fiber Optic Attenuator
There are also variable fiber optic attenuator , usually is inline type, with an adjustable unit on the attenuator to change its attenuation level to a certain amount according to its capacity.

Fiber optic splitter introduction and features

Fiber Optic Splitter Features

Single Mode, multimode, and PM fiber types
Multiple port configurations
Various splitting ratios, 50:50 to 1:99
Tube type or Box type
PC, UPC, and APC fiber optic connectors
Available with FC, SC, ST, LC, and MU terminations

Fiber Optic Splitters Introduction

fiber optic splitter is a device that split the fiber optic light into several parts by a certain ratio. For example, when a beam of fiber optic light transmitted from a 1X4 equal ratio splitter, it will be divided into 4-fiber optic light by equal ratio that is each beam is 25% of the original one. fiber optic splitter is different from WDM. WDM can divide the different wavelength fiber optic light into different channels. fiber optic splitter divide the light power and send it to different channels.

Single window Fiber Optic Splitter and dual window Fiber Optic Splitters

Here the window refers to the working wavelength. Single window fiber optic splitter is with one working wavelength, dual window fiber optic splitter is with two working wavelength. For multimode fiber, the term means that the fiber is optimized for 850 nm and 1310 nm operation. For single-mode fibers, the term means that the fiber is optimized for 1310 nm and 1550 nm operation. For single window fiber optic splitter, its working wavelength usually is one of the above said wavelength.

PLC Fiber Optic Splitter

We supply Planar Lightwave Circuits which are key components used in FTTx networks. We supply the PLC splitters including 1XN to 64 and 2XN to 32 types, they are with a wide range of working wavelength from 1260nm to 1620nm.

Fused Fiber Optic Splitter

We supply single mode fused fiber optic splitters, fiber optic cables, they are available in optional stainless tube package or standard box package. These fiber splitters are single window and dual window types, with optional various kinds of fiber connectors.

Fiber optic pigtail Specifications and Features

Fiber optic pigtail Specifications
Types: single mode, multimode
Terminations: FC, SC, ST, MU, LC, D4, DIN, E2000, MT-RJ, MPO, SMA, E2000, FDDI, and ESCON
Insertion Loss (dB): less than 0.2 (PC and UPC)
Exchangeability: less than 0.2 dB
Tensile Strength: less than 0.2 dB (0 to15 kgf)
Temp. Range: (- 40 to +80 degree centigrade)


Fiber optic pigtails description
If you cut a piece of fiber optic patch cable into two parts, it becomes two pieces of fiber optic pigtails. fiber optic pigtails is a piece of fiber optic cable with fiber connectors on one side of the cable, the other side is used usually for melting with other fiber optical cables. Usually fiber optic pigtails are 0.9mm cable diameter, because it is smaller size and fit for being put inside the fiber optic patch panel boxes or fiber optic splicing enclosures.

Waterproof fiber optic pigtail
Besides the commonly type fiber optic pigtails, we can also make it fan out structure with fiber optic fan out kit, and there is another waterproof fiber optic pigtails, this type fiber pigtails is with big diameter outdoor cable, with waterproof fiber optic connectors installed on it, usually used in harsh environment. They are made according to IEC standards, the products feature low insertion loss, high return loss, good interchangeability and repeat push-pull performance.

A New Kind Of Microphone Fiber Optic Cable

Fiber optic cables are everywhere, installed along roads and train lines, in buildings and under streets. And U.K. scientists have found a way to turn any length of fiber optic cable into a kind of microphone or remote sensor. They have decided to call it the worlds nervous system.

 OptaSense, a part of Qinetiq, has decided to call this new technology Distributed Acoustic Snesing, or DAS. This DAS enables companies to keep a watch on extremely long stretches of cable like railways, pipelines, and roads, in one area watching over a pipe almost 700 km long. With DAS, you can place a microphone every 30 feet.

 Thieves are often stealing cables or oil and now companies are using DAS as a detection system. Usually, thieves will dig out pipelines and then try to break open the pipeline, leaving gushing oil for them to drain from. The DAS system found evidence of an upcoming theft three weeks before it took place.

 By combining something known as Rayleigh scattering with sonar technology that Qinetiq developed for submarines, OptaSense was able to create what is basically land based sonar with DAS. Magnus McEwen-King, the Managing Director of OptaSense, discusses a trip to Monaco for testing the product in a real-world environment. After connecting the technology, he states that we were able to hear everything driving around Monaco: cars, even helicopters. Mr. McEwen-King states that the DAS monitors everything near the cable and is specific enough to detect tunneling below it, or a low flying airplane above it.

 The DAS is great for reporting heavy vibrations, but just how precise is it? Can it pick up voices and essentially be used as a bug? Mr. McEwen King says that is depends on how long the network cable is on a shorter cable, it is possible, with a longer cable, no. He added that dirt and soil tend to attenuate all frequencies higher than 500 hertz anyway.

 This technology can be used in an astounding number of ways; to track vehicle flow on the freeway, to keep an eye on tracking, to less expensive alternatives to ground radar for tracking taxiing airplanes at airports. DAS was installed at Qinetiqs headquarters to demonstrate its uses. Mr. McEwen-King tracked a car driving along the road. When it began to go faster, the tracking indicator changed color from green to orange, signaling that the car is getting very close to the speed limit. If the car went over the limit, the indicator will change to red. Combine this technology with CCTV and you will know exactly who was speeding. Watch out world, now not only is everyone always watching, now they can always be listening as well.

Armored fiber patch cable VS common fiber patch cable

Armoured fiber optic patch cables are with same types of fiber optic connectors as the commonly used types, the different is the cable itself. These armoured fiber optic cables are typically used for indoor applications, with outer diameter of 2mm or 3mm, just like the common types fiber patch cables .

The difference is armoured fiber optic cables are with stainless steel tape just inside the cable jacket and outside the Kevlar, This stainless steel unit provide extra feature as well as retain all the function that a common type fiber optic patch cable can give. Amored fiber optic cords are anti-rodent, and it can be handled as electric cables, it is not easy to get damaged or cut, and it can resist an adult step on it.