Measuring strain using fiber optics
Whether your application requires static or dynamic real-time acquisition or periodic monitoring, Polytec offers the right system for your task. The robust, turnkey interrogators deliver fast and highly accurate measurements from hundreds of fiber Bragg gratings or extrinsic Fabry-Perot sensors.
Monitor length changes over long distances
This measuring technology is based on Fiber Bragg Gratings (FBGs). FBGs are created by means of the fiber being exposed to intense UV radiation at a certain position at a periodical pattern. Several FBGs can be written to a single fiber (typically 15 to 20) and can be read out simultaneously with a single system. This technology enables you to monitor changes along the glass fiber across long distances of up to several kilometers. Standard gratings are temperature-resistant up to approximately 100° C at a spatial resolution of about 1 cm.
Polytec makes fiber sensors depending on the interrogator (readout system) used and the application – fully in line with your individual requirements. In this regard, preassembled fiber optics cables usually achieve 1 % strain, while fibers bonded directly can – depending on their coating – be loaded up to 5 % beyond their original length.
Product selection
si155
The si155 is a fanless optical interrogator for industrial applications. It offers both static and dynamic full-spectrum analysis and delivers long-term, reliable and accurate measurements from hundreds of sensors on 4 parallel channels.
The system has an extremely low-noise high-power wave laser and guarantees absolute accuracy with every scan. The HYPERION platform on which the si155 is based offers groundbreaking functions, including high-performance on-board DSP and real-time FPGA processing. This enables fast full-spectrum data acquisition and flexible peak detection algorithms from fiber Bragg gratings (FBG), long-term FBGs and Fabry-Perot (FP) sensors with low latency for data access to closed-loop feedback applications.
- Full spectrum at 1 kHz with 160 nm simultaneously on 4 parallel channels, no optical switches required
- Dynamic and absolute measurements of FBGs, LPGs and FP optical sensors from a detailed optical spectrum
- Single and continuous 25 dB dynamic range, for each sensor in each channel, regardless of different system losses
- The data verification key guarantees valid output. Each data set is calibrated and checked for possible system error sources (shortly)
si255
The si255 is a fanless optical interrogator for industrial applications. It offers both static and dynamic full-spectrum analysis and delivers long-term, reliable and accurate measurements from almost 1000 sensors on 16 parallel channels. The system has an extremely low-noise high-power wave laser and guarantees absolute accuracy with every scan.
- Full spectrum at 1 kHz with 160 nm simultaneously on 16 parallel channels, no optical switches required
- Dynamic and absolute measurements of FBGs, LPGs and FP optical sensors from a detailed optical spectrum
- Single and continuous 25 dB dynamic range, for each sensor in each channel, regardless of different system losses
- The data verification key guarantees valid output. Each data set is calibrated and checked for possible system error sources (shortly)
OEM Single Board Interrogator
The HYPERION single board interrogator is an optical high-performance measuring device that offers OEM systems perfect integration options. A full suite of software tools, usually available for high-end instruments only, is part of the many functions of the system.
The interrogator is derived from the HYPERION si155 platform and uses the advantages of the patented Fabry-Perot filter from Micron Optics and the wavelength reference technology.
It features breakthrough features, including high-performance on-board DSP and real-time FPGA processing that enables fast, flexible peak detection algorithms for Fiber Bragg Grating (FBG), Long Term Grating, Fabry-Perot (FP), Mach Zehnder (MZ) sensors and others with low latency for data access to closed loop feedback applications.
