Luna os1100 Fiber Bragg Grating Sensor
Single fiber Bragg grating centered in a 2 m polyimide-coated optical fiber for strain and temperature sensing.
- Number of FBGs
- 1
- FBG Length
- 10 mm
- Strain Limit
- 5,000 με
- Strain Sensitivity
- ~ 1.2 pm/με
Overview
The Luna os1100 is a fiber Bragg grating (FBG) designed for fiber optic sensing applications. It consists of a single FBG centered in a two-meter length of polyimide-coated optical fiber. It can be used on its own or spliced into an array of many FBGs.
An FBG is a reflector inside the core of the fiber that is set to a specific wavelength of light. When the fiber at the FBG location 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 are proportional to the change in strain or temperature.
The os1100 is available in dozens of distinct center wavelengths. Using different wavelengths allows dozens of FBGs to be multiplexed on a single fiber. Typical uses range from basic experiments to the construction of complex transducers containing one or more FBGs.
The polyimide coating transfers strain through the fiber coating to the FBG in the fiber core and performs over a wide temperature range. One or two FC/APC connectors and loose buffer tube protection are available as packaging options. The os1100 can be paired with Luna HYPERION interrogators as part of a high-speed multipoint fiber optic sensing system.
Key Features
- Optional FC/APC connector and loose buffer tube for ease of handling
- Clearly marked FBG location
- Non-metallic construction
- Resistant to lightning, corrosion and EMI
- Passive sensor with no spark hazard and no power at the sensor
- Multiplexing of many sensors on few cables over long range
- Can be welded, glued, embedded or connected in series
- Fatigue life over 100 million cycles
- Available in dozens of distinct center wavelengths
Specifications
| Number of FBGs | 1 |
|---|---|
| FBG Length | 10 mm |
| Strain Limit | 5,000 με |
| Strain Sensitivity | ~ 1.2 pm/με |
| Operating Temperature Range | -40 to 120 °C |
| Thermal Response | ~ 9.9pm/C |
| Fiber Lead Length | 1 m (± 10 cm), each end |
| Fiber Type | SMF28-Compatible |
| Fiber Coating | Polyimide |
| Fiber Re-Coating Diameter | 145 - 165 μm |
| Buffer Tube | 1 mm loose tube included with optional FC/APC connector |
| Fiber Bend Radius | ≥ 17 mm |
| Center Wavelengths |
Standard - 1460 to 1620 nm in 4 nm intervals
Wavelength tolerance +/- 1nm; selected by the wwww field of the ordering code
|
|---|---|
| Peak Reflectivity (Rmax) | > 70% |
| FWHM (-3 dB point) | 0.25 nm (± .05 nm) |
| Isolation |
> 15 dB
@ ± 0.4 nm around center wavelength
|
| Ordering code format |
os1100-wwww-1xx-1yy
wwww = wavelength; 1xx = fiber lead 1 length & connector; 1yy = fiber lead 2 length & connector
|
|---|---|
| Ordering example | os1100-1560-1FC-1UT |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- SHM for civil and geotechnical structures
- SHM for energy systems
- Structural test and model validation
- Process temperature monitoring
- Strain and temperature sensing
- Construction of FBG-based transducers
Options & Accessories
| Option | Description |
|---|---|
| UT | Standard Lead Length, 1 m — Termination type for fiber lead 1 (1xx) or fiber lead 2 (1yy) |
| FC | Unterminated FC/APC Connector — Termination type for fiber lead 1 (1xx) or fiber lead 2 (1yy); includes 1 mm loose buffer tube |
Documents & Resources
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