Often when installing a complete analysis system; spectrometer, fiber optic cables, and sample interfaces, the noise contribution of the fiber optic cable is overlooked. For some applications simply finding the least expensive fiber optic cable is enough. However, many applications require more precision to reduce noise and meet the application requirements. For applications requiring a thermally stable process fiber, we offer a patented fiber optic cable design shown in the image below. The black Silicone Buffer and Inner Tefzel™ dramatically reduce the effects of naturally occurring temperature variations.
Figure 1: Anatomy of our Process Fiber Cable Jacketing
Signal stability and low noise in remote spectroscopy depend upon fiber optics with high transmission. The transmission must be affected very little by environmental influences such as temperature, vibration, and ambient light levels. From a patented fiber design to our emphasis on high-quality materials, our spectroscopic grade fiber optic cable is designed for the highest performance in transmission efficiency and durability. A polyimide coating and a patented silicone-based buffer protect the fiber as well.
For critical spectroscopic measurements, our engineers developed a special formulation of thermally stable 500-micron and 600-micron near-infrared (NIR) fiber optic cable. The 500-micron fiber core was optimized for use with our NIR-O Full Spectrum spectrometer and the ClearView db (dual beam) photometer but can also be used with any other fiber optic-based analyzer brands.
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To prove the value of our NIR fiber, a 50m spool of thermally stable fiber optic cable and a 50m spool of a competitor’s brand fiber optic cable were loaded into the environmental chamber. Both fibers were then connected to a NIR-O Full Spectrum Analyzer. After referencing both fibers, a thermal cycling routine on the oven was performed overnight (30-45C○ two cycles). Spectra of each fiber spool was collected once every 10 minutes.
The jacketing design of the thermally stable NIR fiber optic cable reduces drift in the analyzer system. Fifty meters of both the Guided Wave thermally stable fiber and the competitor’s fiber was spooled out on the factory floor and connected to a NIR-O Full Spectrum Analyzer, a zero or reference was collected. The analyzer was then scheduled to collect one spectrum on each fiber optic cable once a minute over 3 days.
For optimal system performance and savings, it’s important to properly select the optical fiber cables that will best match the spectroscopic analyzer system. Keep in mind the optical wavelength range, environmental installation conditions, required signal transmission distance, fiber diameter, and installation requirements. Contact us for pricing and availability of our thermally stable near-infrared fiber optic cables and industry-leading optical efficiency sample interfaces.
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