Archive for May 2012

Fiber Optic Fusion Splicers and How They Work

What is a fiber optic fusion splicer?

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.

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.

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Report: Security systems integration market could exceed $30B

IMS Research forecasts that the Americas market for security systems integration will exceed $30 billion in 2016, and will grow at an average rate of more than 7 percent from 2011 until then. The firm’s new report, which focuses on the installation and maintenance of security systems in the Americas region, finds that the U.S. is forecast to remain the largest market in the Americas throughout this time. However, faster growth is forecast for Latin America countries such as Brazil.

“The Latin America market is a really exciting place right now for systems integration,” comments Paul Bremner, IMS Research market analyst and the report’s author. “A lot of technology providers are trying to establish themselves in this marketplace, including the large international systems integrators. In the U.S., it’s a different picture entirely, and I believe we’re seeing the start of consolidation.”

The Americas security systems integration market remains highly competitive, notes the research, with the largest five integrators accounting for less than 20 percent of the market. The market is seen as even more fragmented in some Latin American countries. Further, competition appears to be increasing, with traditional IT integrators entering the security market and taking market share away from the established security systems integrators.

IMS’s Bremner continues, “The security systems integration competitive environment is really interesting because the range of companies in the market is huge. At one end there are the enterprise integrators, like Johnson Controls and Siemens. At the other end, are five-man companies serving a product or geographic market niche.”

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