os1100 Fiber Bragg Grating
The os1100 Fiber Bragg Grating (FBG) is designed for use in fiber optic sensing applications. It is a single FBG centered in a two meter length of polyimide coated optical fiber. It may be used individually or can be spliced into an array of many FBGs.
Fiber Bragg gratings are the fundamental elements upon which most fiber optic sensors are based. An FBG is an invisible reflector inside the core of the fiber that is set to a specific wavelength of light. When the fiber where the FBG is located is exposed to strain or temperature, the FBG’s “center wavelength” shifts to a higher or lower wavelength. The direction and magnitude of the shift is proportional to the change in strain or temperature. os1100’s are available in dozens of distinct center wavelengths. Using different wavelengths allows multiplexing of dozens of FBGs on a single fiber.
os1100’s are used in applications ranging from basic experiments to construction of complex transducers containing one or more FBGs. The polyimide coating provides excellent transfer of strain through the fiber coating to the FBG in the fiber core. Polyimide also performs well over a wide temperature range. One or two FC/APC connectors, and loose buffer tube protection, are available as packaging options.
Key Features
Optional FC/APC connector and loose buffer tube for ease of handling
Clearly marked FBG location
Non metallic construction
Benefits
Longevity – resistant to lightning, corrosion, EMI Passive – no spark hazard, no power at sensor
Multiplexing – many sensors, few cables, long range
Laser Mode control and selection
Versatility – small size, long distances and sense many properties with one system Installation – weld, glue, embed, connect in series Ruggedness – fatigue over 100 million cycles, wide temperature range
os1200 Optical Strain Gage
The os3100 is a spot-welded or epoxy-mounted optical strain gage based on fiber Bragg grating (FBG) technology. The os3100 Optical Strain Gage is designed to make fiber handling easy and sensor installation fast and repeatable. Its stainless steel carrier holds the FBG in tension and protects the fiber during installation. Since there are no epoxies holding the fiber to the carrier, long term stability is ensured by design. For temperature compensation, the os3100 may be connected in series with an os4100, FBG Temperature Compensation Gage or an os4350, FBG Temperature Sensors.
Two mounting options provide for either weld or epoxy attachment to a structure’s surface. Installation time is just a few minutes with welded gages and can be used immediately after attachment. Epoxy gages typically cure in less than 24 hours at room temperature, similar to electronic foil strain gages.
In side by side comparisons with foil strain gages, the os3100 is equally sensitive and accurate, while providing for greater strain range and 100 times more fatigue life. The os3100 strain gage is qualified for use in harsh environments and delivers the many advantages inherent to all FBG based sensors. This sensor can be used alone or in series as a part of an FBG sensor array. Installation and cabling for such arrays is much less expensive and cumbersome than comparable electronic gage networks. Multiple optical strain gages can be arranged in close proximity at 0, 45 and 90 degrees for strain rosette measurements.
Key Features
Optional FC/APC connector and loose buffer tube for ease of handling
Clearly marked FBG locations
Splice-free array
Non metallic construction
Benefits
Longevity – resistant to lightning, corrosion,
EMI. Passive – no spark hazard, no power at sensor
Multiplexing – many sensors, few cables, long range
Versatility – small size, long distances and sense many properties with one system
Installation – weld, glue, embed, connect in series
Ruggedness – fatigue over 100 million cycles, wide temperature range
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