Distributed fiber Acoustic Sensing（DAS），based on the principle of phase OTDR, using a single ordinary optical fiber as a transmission, the Rayleigh scattered light inside the fiber to detect, obtain phase and frequency information, to achieve the detection of sound, vibration and other signals, widely used in oil, gas pipelines, perimeter security, high-speed rail transit and other fields.
For the field of distributed fiber optic acoustic sensing, FIBERWDM has launched DAS integrated module, which integrates self-developed ultra-narrow linewidth laser, linewidth <3KHz, 80M_AOM, pulse amplifier, balanced photodetector. The module is highly integrated, with small size and high reliability.
DAS Integrated Optical Module
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Features
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Applications
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Optical Path
Product Specification
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Product Model: FW-DASXXX |
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Parameters |
Min |
Typ. |
Max |
Unit |
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Sensing Distance |
- | 20 | 40 | km |
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Center Wavelength |
- |
1550.12 |
nm | |
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Linewidth |
- | - | 3 |
Khz |
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Pulse Width |
60 | 100 | -- | ns |
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Repetition Rate |
- | 2 | 20 |
KHz |
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Peak Pulse Optical Power |
- | 23 | 30 |
dBm |
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Input Impedance |
- | 50 | - |
Ohm |
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Shift Frequency |
- | 80 | - |
MHz |
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Wavelength |
800~1700 |
nm |
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Gain |
30K |
V/A |
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Coupling Mode |
AC |
- |
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Bandwidth |
100 |
MHz |
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Modulation Mode |
External |
- |
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Note:1)Single and Dual channel can be selectable; XXX: 348-Single Channel, 349-Dual Channel 2)The signal-to-noise ratio at the tail is 4dB |
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| Parameters | Indicator | Remark | |
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Electrical |
Power Supply |
DC +12V/GND |
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Power Consumption |
<24W |
Full-temperature |
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Mechanical |
Dimensions |
180*140*30mm |
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Pigtail Type |
SMF | ||
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Communication |
Connector |
4PIN |
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Level |
RS232 |
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Interface |
Read and Set Parameter |
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Parameter |
Min |
Max |
Unit |
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Working Temperature |
-15 |
+55 | ℃ |
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Storage Temperature |
-20 |
+70 |
℃ |
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Related Humidity |
5 |
95 |
% |
Mechanical Dimension
For ordering information and custom solutions, please contact us: sales@fiberwdm.com
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Tel : +86 15989256178
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Email : sales@fiberwdm.com
