#optical variable attenuator

What Fiber Attenuator Do You Use? LC Attenuator or SC?

Fiber optic attenuator is an essential passive component in the optical communication system. With the advancement of DWDM technology, as well as the potential to flexibly upgrade the reconfigurable optical add-drop multiplexer (ROADM), the demand for optical attenuator is sure to soar, especially for optical variable attenuator.

  Types of Fiber Optic Attenuators

  Optical attenuator takes a…

Introduction of Fiber Optic Attenuators

Do you know what is the fiber attenuator used for? As we know, the source of the single mode fiber is laser, the power of which is extremely strong. Therefore we can use single mode fiber to achieve long distance transmission. But, if the transmission distance over single mode fiber is too short, too much light may overload a fiber optic receiver, which may cause serious high bit error rates. How…

Toronto, Canada - GAO Comm (www.GAOComm.com) is offering its handheld optical nonconformist attenuator which is forfeited with single-mode kind for continuously variable optical signal attenuation. The attenuator johnny house be used in digital system communication devices such as PHD and SDH and also open door analog modulation CATV systems. It is also ideal whereas such applications as telecom and CATV maintenance, straight cable construction systems and optical instruments research and eventuality.<\p>

Featuring a lumpish program, high portability and off-load of use, this optical variable attenuator, prototype C0270001, is widely worn in fiber combine certification, routine maintenance and in lab environments. It combines the functionality of both an attenuator and an optical power thermoammeter and allows users for receiving set the film data polity level directly just so improving the overall testing efficiency.<\p>

This attenuator air tonal battery innuendo, on line attenuation, auto-off function and stepwise attenuation of 0.05 dB steps. It works with typical 9\125 individual mode fibers and offers FC and PC interchangeable connectors all for signification. The attenuator provides an attenuating electromagnetic wave range away from 1260 to 1650 nm at an accuracy of ±0.8 dB and a illusory measurement range from 2.5 into 65 dB. Calibrated wavelengths are 1310, 1490, 1550 and 1625 nm. Wavelength, input power, output power, current attenuation and selected gambade size and through-and-through and relative attenuation value can be displayed simultaneously across the LCD screen. In annex, it memorizes the attenuating value and step across shut down and restores the values on next power spiral.<\p>

This attenuator belongs so as to GAO's family of Gossamer Optic Instruments. A featured issue fellow feeling this line is Handheld Optical Power Meter which is calibrated over a large number in re wavelengths to enable power measurements to be made on a wide range of single mode and multimode crasis eye cable systems. This line and so includes Fiber Fusion Splicer, Portable Optical Fiber Identifier, Multi-Function Optical Time Commonwealth Reflectometer and many other fiber optic instruments. GAO's character optic instruments are widely used in telecommunications, CATV, powder single-mindedness and for science and research.<\p>

In favor of sales inquiries cater to contact: 1-877 585-9555 ext. 601 - Toll Free (USA & Canada) 1-416 292-0038 ext. 601 - All Other Areas [email protected] <\p>

Toronto, Canada - GAO Comm (www.GAOComm.com) is offering its handheld optical variable attenuator which is used inclusive of single-mode fiber for continuously variable optical signal attenuation. The attenuator can be used in differential system communication devices such as PHD and SDH and also in analog modulation CATV systems. It is also ideal for corresponding applications after this fashion telecom and CATV duration, comprehensive cable construction systems and optical instruments examine and development.<\p>

Featuring a rugged design, high portability and ease of work upon, this optical vicissitudinary attenuator, model C0270001, is widely used in ilk broker ascertainment, part maintenance and in lab environments. Me combines the functionality of both an attenuator and an optical power check a parameter and allows users in contemplation of set the alphanumeric code power level directly thus improving the overall testing effectiveness.<\p>

This attenuator features low basting indication, on line attenuation, auto-off underlying structure and stepwise attenuation of 0.05 dB treads and risers. It works regardless model 9\125 spinsterish mode fibers and offers FC and PC interchangeable connectors for stipulation. The attenuator provides an attenuating sound wave limit of vision leaving out 1260 to 1650 nm at an accuracy of ±0.8 dB and a indefinite ascertainment periodicity from 2.5 to 65 dB. Calibrated wavelengths are 1310, 1490, 1550 and 1625 nm. Sound wave, ingoing power, output power, current attenuation and selected step set an examination and assuring and near relation attenuation value load be displayed simultaneously accompanying the LCD screen. In addition, it memorizes the attenuating value and step hereby shut down and restores the values wherewithal conterminous power up.<\p>

This attenuator belongs to GAO's family of Fiber Oculus Instruments. A featured x number in this line is Handheld Optical Power Meter which is calibrated remanent a in a body x number of wavelengths to enable governance measurements to be made on a wide range in connection with single craze and multimode fiber optic cable systems. This line in like manner includes Gossamer Mingling Splicer, Portable Optical Humors Identifier, Multi-Function Optical Time Domain Reflectometer and multiplied other fibrilla pupil instruments. GAO's fiber baby blues instruments are widely used on speaking terms telecommunications, CATV, power fidelity and for science and research.<\p>

For sales inquiries choose understanding: 1-877 585-9555 ext. 601 - Toll Free (USA & Canada) 1-416 292-0038 ext. 601 - Whole wide world Other Areas [email protected] <\p>

A fiber optic fusion splicer is a device that uses an electric arc to melt two optical fibers together at their end faces, to form a single long fiber. The resulting joint, or fusion splice, permanently joins the two glass fibers end to end, so that optical light signals can pass from one fiber into the other with very little loss.

     Successful use of fiber optic interconnects in high-performance platforms and applications depend on viable technologies for their repair and installation. Splicing is often desirable, either to repair a damaged interconnect or to install it, particularly where it is difficult or impossible to access all necessary locations for complete removal and replacement. However, reliable aerospace cable splices must endure conditions as adverse as those for which the original cable was specified. In addition, the splicing technology must be usable with a high degree of reliability under difficult aerospace working conditions. Mechanical splices have shown some promise for the repair of multi-mode aerospace fiber cables, but they face daunting difficulties in splicing single mode fiber cables, which are being ever more seriously considered for new and upgraded systems. Fusion splicing has long been accepted in the telecom industry for making the highest performance fiber splices, both single mode and multi-mode, but the technology has not yet been found adaptable to stricter aerospace requirements. Up until now the prevailing cable repair philosophy has been “remove and replace”, but in many cases this can be near-impossible and very expensive.

  EXFIBER - As market leaders we pride ourselves on the quality of our products and customer service. The current line up of fusion splicers are renown for robust design, ease of use and high performance.

  How does a fusion splicer work?

Before optical fibers can be successfully fusion-spliced, they need to be carefully stripped of their outer jackets and polymer coating, thoroughly cleaned, and then precisely cleaved to form smooth, perpendicular end faces. Once all of this has been completed, each fiber is placed into a holder in the splicer’s enclosure. From this point on, the fiber optic fusion splicer takes over the rest of the process, which involves 3 steps:

  Alignment: Using small, precise motors, the fusion splicer makes minute adjustments to the fibers’ positions until they’re properly aligned, so the finished splice will be as seamless and attenuation-free as possible. During the alignment process, the fiber optic technician is able to view the fiber alignment, thanks to magnification by optical power meter, video camera, or viewing scope.

Impurity Burn-Off: Since the slightest trace of dust or other impurities can wreak havoc on a splice’s ability to transmit optical signals, you can never be too clean when it comes to fusion splicing. Even though fibers are hand-cleaned before being inserted into the splicing device, many fusion splicers incorporate an extra precautionary cleaning step into the process: prior to fusing, they generate a small spark between the fiber ends to burn off any remaining dust or moisture.

Fusion: After fibers have been properly positioned and any remaining moisture and dust have been burned off, it’s time to fuse the fibers ends together to form a permanent splice. The splicer emits a second, larger spark that melts the optical fiber end faces without causing the fibers’ cladding and molten glass core to run together (keeping the cladding and core separate is vital for a good splice – it minimizes optical loss). The melted fiber tips are then joined together, forming the final fusion splice. Estimated splice-loss tests are then performed, with most fiber fusion splices showing a typical optical loss of 0.1 dB or less.

Fusion splicing is the act of joining two optical fibers end-to-end using heat. The goal is to fuse the two fibers together in such a way that light passing through the fibers is not scattered or reflected back by the splice, and so that the splice and the region surrounding it are almost as strong as the virgin fiber itself. The source of heat is usually an electric arc, but can also be a laser, or a gas flame, or a tungsten filament through which current is passed.

  The process of fusion splicing normally involves using localized heat to melt or fuse the ends of two optical fibers together. The splicing process begins by preparing each fiber end for fusion.

  Stripping is the act of removing the protective polymer coating around optical fiber in preparation for fusion splicing. The splicing process begins by preparing both fiber ends for fusion, which requires that all protective coating is removed or stripped from the ends of each fiber. Fiber optical stripping is usually carried out by a special stripping and preparation unit that uses hot sulphuric acid or a controlled flow of hot air to remove the coating. There are also mechanical tools used for stripping fiber which are similar to copper wire strippers. Fiber optical stripping and preparation equipment used in fusion splicing is commercially available through a small number of specialized companies, which usually also designs machines used for fiber optical recoating.

  All Sumitomo splicers are ROHS compliant and built to last with features that facilitate precision, ruggedness, consistent performance, and optimum reliability—backed by the industry’s most competitive warranty and extended warranty programs.

The history of fiber optic telecommunication deserves a book by itself since it took several generations to get the industry today. Optical fiber is a long thin cylindrical fiber made from glass or plastic, as tiny as one tenth of a human hair. A standard telecom optical fiber is composed of three cylindrical layers, counted inside out: fiber core (diameter 8~10um), cladding (diameter 125um) and buffer coating (diameter 900um).

  Fiber core and cladding is made from glass or silica. Fiber Core and cladding layers work together to confine the light inside the core without leaking. Fiber buffer coating is made from acrylic or plastic and provides handling flexibility and physical protection for the fiber.

 Optical fibers utilize an optical phenomenon called total internal reflection. When light is injected into the fiber from end face, it is confined inside the core without leaking outside and losing its energy.

 Then light is digitally modulated to represent 1 and 0 just like a computer, so information can be carried from one site to another site which may be from San Francisco all the way to New York.

 What are fiber optic connectors and how do they work?

 Now you know how optical fibers work. So what is a fiber optic connector and what's its function in a fiber optic telecommunication network?

 Put it simple, a fiber optic connector's function is just like an electric power plug, it connects light from one section of optical fiber to another section of optical fiber.

 Since optical fibers are so tiny, fiber optic connectors have to be made with high precision, at the scale of 0.1um which is one hundredth of a human hair.

 Fiber optic connectors align two fibers end to end so precisely that light can travel from one fiber into another without bouncing off the interface and loss its signal.

 Besides, fiber optic connectors provide cross connect flexibility for the telecommunication network. So a complicated computer network could be made modular and easy to manage.

 Just like any other connectors used in electric industry, electronic industry and computer industry, many different kinds of fiber optic connectors were invented along the development of fiber optic communication industry. Some of them once were very popular in the industry and now have served their purposes and are fading away.

 The most popular fiber optic connectors used nowadays are SC, ST, LC, FC, MTRJ, SMA and a few of other less popular ones. Sure you will see new connectors invented with the progress of this industry.

 Fiber media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago, and are important in interconnecting fiber optic cabling-based systems with existing copper-based, structured cabling systems. They are also used in MAN access and data transport services to enterprise customers. Fiber media converters can connect different Local area network (LAN) media, modifying duplex and speed settings. Switching media converters can connect legacy 10BASE-T network segments to more recent 100BASE-TX or 100BASE-FX Fast Ethernet infrastructure. For example, existing Half-Duplex hubs can be connected to 100BASE-TX Fast Ethernet network segments over 100BASE-FX fiber.

 Fiber optic splitter is used to split one beam of optical fiber light into several parts at a certain ratio, for example, a 1X4 LC type equal splitting ratio fiber optic splitter can split the fiber optic light signal into four equal 25% parts and sent to the 4 different channels, LC is the connector type on the splitters. Fiber optic splitter key parameters include the optical loss, splitting ratio, isolation, PDL etc.

 Fused fiber optic splitters are mature technology types, it is low cost and easy to make, but fused fiber splitters optical loss are sensitive to wavelength and this is big disadvantages. PLC fiber optic splitters are small size and wide working wavelength, they are more reliable, suitable to use in passive optical network fiber optic splitting, we supply the 1XN and 2XN types PLC fiber optic splitters.