With the growing need to accurately monitor processes in harsh environments, optical fibers are becoming an essential element within monitoring systems, both as the communications line and as the sensing element. Optical fiber sensors have been widely adopted and used in pipeline monitoring, perimeter monitoring, heat detection and structural monitoring systems, all of which operate within the typical 45 °C to 85 °C temperature range of a standard optical fiber.
However, as industries push their sensing requirements into environments such as those found in oil wells (for downhole measurement) and nuclear reactors, there is a need for optical fibers that can tolerate these extremely high temperatures and challenging environments.
Specifically developed for harsh temperature sensing and communications environments, the new PYROCOAT K Optical Fiber is up to the challenge. This mechanically-strong fiber features an improved coating that provides excellent thermal stability, enabling wider operating temperatures than other commercially available polymer-coated fibers. In fact, the PYROCOAT K Optical Fiber provides reliable performance even when subjected to extreme, long-term, high temperature exposure. (more…)
An international research group has developed a world-first fiber optic technology which may help detect a wide range of gases with unprecedented sensitivity. Published in the journal Optica, the discovery involves the creation of a fiber optic device which consists of an invisible infrared laser coupled to an ultra-broadband supercontinuum generator – two elements that researchers have never managed to combine into a single optical system before. Led by Macquarie University scientists in Australia, the group believes that potential applications for this technology range from breath analysis to air-quality monitoring.
According to lead researcher Dr. Darren Hudson of Macquaraie University, “This new supercontinuum technology is capable of being used to detect an array of gases, including methane, carbon dioxide and nitrous oxide – gases that can be harmful to humans in high levels and have implications in climate change.”
Over the past decade, researchers around the globe have worked to create high-brightness sources of infrared light – an invisible form of light that sits just beyond visible red light in the spectrum. While this work has revolutionized how we detect and measure a staggering range of molecules, the current technology still requires large laser systems, optical laboratory conditions and an expert operator. (more…)
Interested in fiber optic sensing? If so, you’ll want to check out the “Tales From the Front Line of Fiber Optic Sensing” webinar presented by OptaSense and sponsored by the Fiber Optic Sensing Association (FOSA).
Whether it’s detecting pipeline leaks, damage to railroads or intrusion at critical facilities, fiber optic sensing plays an increasingly important role in protecting and keeping key infrastructure assets operating globally.
The webinar features fiber optic sensing installations across a wide range of industry verticals, applications and locations, including system action videos with the challenges and successes of actual deployments.
To download and view this webinar, go here.
To subscribe to the FOSA e-newsletter, go here.
If so, don’t fret. This session on “Optical Fibers for Automation Controls and Industrial Networking” is still available for viewing.
Specifically designed for integrators, this webinar discusses the challenge of transforming Industrial Automation configurations, using Industrial Ethernet, to achieve a factory floor that features a more intelligent, efficient and sophisticated network.
This session will also enhance your ability to support customers in making the most environmentally appropriate fiber optic investments.
To access and view this webinar, go HERE.
Leading experts from OFS will present six technical papers at the first-ever UL and IWCS China Cable & Connectivity Symposium in Shanghai, China, from April 25 through April 27, 2017.
These presentations will cover a wide range of subjects from acrylate-based, harsh environmental coatings for specialty optical fiber to high-speed, SWDM transmission over Wideband Multimode Fiber.
To learn more about these technical papers and the Symposium, go here.
Different applications and optical fiber types present varying requirements for fiber coatings. When specialty optical fibers are used in demanding conditions, the fibers require coatings that are sustainable when subjected to harsh circumstances.
In fact, the successful deployment of fiber in these environments can often depend far more on the fiber’s protective external coating rather than its internal optical design. Fibers may be under attack from high and low temperature ranges, excessive humidity, high pressure, aggressive chemicals, mechanical interactions or any combination of these elements.
A recent OFS white paper in NASA Tech Briefs evaluates the stability of commercially available and in-house formulated, acrylate-based coatings to help determine the optimum coating for a range of conditions. To read more, please go HERE.
The commercial use of optical fiber in harsh environments is continually growing. These applications include medical probes that undergo sterilization at elevated temperatures and distributed sensors in oil and gas pipelines and wells exposed to extreme heat and cold. For these fibers to be used successfully, researchers and manufacturers must address the issues of fiber performance and reliability under the harshest conditions.
However, current theories and knowledge on the strength and dependability of silica-based optical fiber have been based almost exclusively on experiments conducted in optical telecommunications environments. Moreover, these tests only used a relatively narrow range of temperatures. For usage in extreme environments, fiber developers and users need new data and information.
In a recent white paper from OFS Specialty Photonics, researchers describe a setup for testing the tensile strength of optical fiber when exposed to high temperatures. This paper also reports the initial results of dynamic tensile strength testing conducted on polyimide-coated optical fiber at elevated temperatures over various time intervals.
To learn more and access this white paper, CLICK HERE.
EuroWire, an international magazine covering the wire and cable industries, has featured an OFS white paper entitled “Long-Term Cable Reliability Design Criteria.”
In this paper, Dave Mazzarese, Mike Kinard and Phil Konstadinidis investigate the current requirements for allowable axial load on fiber optic cables, with a focus on overhead cables. Their findings suggest that the current criterion found in many fiber optic cable standards may be too optimistic.
To access the full article, please use this link.
OFS’ Crimp and Cleave technology helps make the typical 10-minute epoxy/polish process for installing fiber optic connectors a thing of the past. As part of an Industrial Networks solution, the LC Crimp and Cleave Connector takes center stage because of its compatibility with most common small form-factor pluggable (SFP) transceivers.
While capitalizing on the advanced optical and mechanical properties of HCS® (Hard Clad Silica) and Graded Index HCS GiHCS® optical fibers, the LC Crimp and Cleave Connector attaches to the cable through mechanical means rather than traditional epoxy/polish methods. Designed with the field installer in mind, technicians with even minimal fiber optic experience can now use the Crimp and Cleave technology to help rapidly and efficiently install new or repair damaged fiber optic cables.
The links provided below offer detailed information on this new solution:
Press Release: https://www.ofsoptics.com/pdf/2014/GiHCS%20LC%20Connector%20Press%20Release10%203%2014.pdf
Fiber Optic Catalog: http://fiber-optic——-catalog-ygcfc.hosts.cx/keyword/ofs/lc-crimp-cleave-connectors-for-industrialized-230-?keyword=LC%20Crimp%20and%20Cleave%20Connector&key=product&SchType=2&filter=1
Fiber optic distributed temperature sensing systems (DTS) are valuable tools used for a broad range of applications, including the monitoring of hydrologic systems and power cables, and the detection of pipeline leaks. In many fiber optic DTS systems, a dual-ended configuration can correct the temperature measurement error associated with wavelength dependent loss (WDL) of the optical fiber. This design can also provide a more accurate temperature measurement when compared with a single-ended fiber system.
Xiaoguang Sun, David T. Burgess, Kyle Bedard, Jie Li and Mike Hines of OFS recently presented a white paper on this subject at the 2015 SPIE Defense, Security and Sensing Conference. This paper focuses on their research findings when a miniature-turnaround device built with a short section of a graded index (GI) fiber is used. To read more, please go HERE.