Distributed Fiber Optic Acoustic Sensing (DAS) Integration Module
Distributed acoustic sensing module Integrated 3k narrow linewidth laser AOM acousto-optic modulator, EDFA amplifier and balanced detector.
Huang
Email: Hqy@ybphotonics.com
Product Info
Introduction
The distributed fiber optic DAS integrated module has a high performance 3k narrow linewidth laser, AOM acousto-optic modulator, EDFA amplifier and other devices integrated inside, with coherent detection optical path and very sensitive technical features.Easy OEM for customers.
DAS integrated module integrates ultra-narrow linewidth light source, AOM acousto-optic modulator, pulsed EDFA, optical circulator, Raman amplifier, DAS coherent receiver module, etc., which only needs to be paired with a high-speed data acquisition card to form a set of DAS distributed acoustic wave measurement system. The module is highly integrated, small in size, and adopts independent intellectual property rights of coherent receiver module, which features high signal-to-noise ratio of coherent detection and increases the sensing distance of distributed fiber optic acoustic wave sensing system. The module is specially designed for distributed fiber optic acoustic wave sensing, perimeter security equipment vendors to provide high-quality supporting products and solutions.
Features
- Highly integrated (UNL, AOM, EDFA, Raman)
- High stability and reliability
Principle diagram
Parameters
Module parameters
Min. Type. Max. Unit Notes Measuring Distance
60 km pulse width
50 500 ns preheating time
<10 Min operating voltage
4.8 5.2 V Power 3.5 9 15 W operating temperature -20 60 ℃ Storage temperature -30 70 ℃ communications interface RS-232 communications protocol Modbus-RTU Ultra-narrow linewidth light source Min. Type. Max. Unit Notes operating wavelength 1530 1550 1570 nm output power 10 13 dBm line width <3 kHz relative intensity noise <120 dB/Hz wavelength drift ±1 pm power stability ±2% Side mode rejection ratio 60 dB Pulsed EDFA Min. Type. Max. Unit Notes Operating wavelength range 1550.12 nm Input peak optical power 10 dBm Input average optical power -35 -30 dBm Output peak optical power 23 dBm Output average optical power 0 dBm repetition rate 100 kHz coefficient of noise 5.5 dB Polarization Related Gain 0.5 dB polarization mode dispersion 0.5 ps AOM Min. Type. Max. Unit Notes Operating wavelength range 1520 1550 1580 nm Average optical power 0.5 W Maximum pulsed light power 0.5 kW insertion loss 2.5 3 dB extinction ratio 50 dB Rise/fall time 30 ns frequency 80 MHz standing wave ratio (physics) 1.2:1 Input Impedance 50 Ω RF power 2.5 W frequency shift 80 MHz Raman amplifier Min. Type. Max. Unit Notes Laser wavelength 1451 nm Output power range 25 27 dBm Balance detector Min. Type. Max. Unit Notes bandwidths 80 MHz gain (electronics) 80 kV/A NEP 30 pW/Sqrt(Hz)
DAS Integrated Module Control Software Screenshot
Fiber optic vibration monitoring system hardware
FAQ
Q：What kind of DAQ card you need for your DAS module？
A: Need at least 250M high-speed capture card. Dual Port 250MSps High-Speed DAQ For DVS/DAS
Q: What is the frequency of the AOM integrated in the DAS module?
A：By default we use 80M AOM. If a 200M AOM is required, we have available support.
Q：Do I still need to buy an AOM driver for the DAS Integration Module?
A: The AOM driver is included in the quote for our DAS Integration Module, so you don't need to purchase the AOM driver separately.
Q：DVS and DAS, what is the difference between them?
A: dvs is a qualitative measurement, detecting vibration by amplitude, but amplitude and vibration are not linear, das is phase demodulation, the demodulated phase is completely linear with vibration and can completely recover the vibration or sound signal.
Screenshot of DAS test
Related content
- [Tutorial] How to wire the DVS/DAS system installation process?
- Distributed Fiber Optic Vibration Sensing Module
- Distributed fiber optic acoustic sensing DAS module
- 100MSps high speed DAQ card for DVS
- Dual Port 250MSps High-Speed DAQ For DAS
- ultra-narrow linewidth 3k 1550nm laser
- Fiber optic vibration sensing DVS
The distributed fiber optic DAS integrated module has a high performance 3k narrow linewidth laser, AOM acousto-optic modulator, EDFA amplifier and other devices integrated inside, with coherent detection optical path and very sensitive technical features.Easy OEM for customers.
DAS integrated module integrates ultra-narrow linewidth light source, AOM acousto-optic modulator, pulsed EDFA, optical circulator, Raman amplifier, DAS coherent receiver module, etc., which only needs to be paired with a high-speed data acquisition card to form a set of DAS distributed acoustic wave measurement system. The module is highly integrated, small in size, and adopts independent intellectual property rights of coherent receiver module, which features high signal-to-noise ratio of coherent detection and increases the sensing distance of distributed fiber optic acoustic wave sensing system. The module is specially designed for distributed fiber optic acoustic wave sensing, perimeter security equipment vendors to provide high-quality supporting products and solutions.
Features
- Highly integrated (UNL, AOM, EDFA, Raman)
- High stability and reliability
Principle diagram
Parameters
| Module parameters | Min. | Type. | Max. | Unit | Notes |
|---|---|---|---|---|---|
| Measuring Distance | 60 | km | |||
| pulse width | 50 | 500 | ns | ||
| preheating time | <10 | Min | |||
| operating voltage | 4.8 | 5.2 | V | ||
| Power | 3.5 | 9 | 15 | W | |
| operating temperature | -20 | 60 | ℃ | ||
| Storage temperature | -30 | 70 | ℃ | ||
| communications interface | RS-232 | ||||
| communications protocol | Modbus-RTU | ||||
| Ultra-narrow linewidth light source | Min. | Type. | Max. | Unit | Notes |
| operating wavelength | 1530 | 1550 | 1570 | nm | |
| output power | 10 | 13 | dBm | ||
| line width | <3 | kHz | |||
| relative intensity noise | <120 | dB/Hz | |||
| wavelength drift | ±1 | pm | |||
| power stability | ±2% | ||||
| Side mode rejection ratio | 60 | dB | |||
| Pulsed EDFA | Min. | Type. | Max. | Unit | Notes |
| Operating wavelength range | 1550.12 | nm | |||
| Input peak optical power | 10 | dBm | |||
| Input average optical power | -35 | -30 | dBm | ||
| Output peak optical power | 23 | dBm | |||
| Output average optical power | 0 | dBm | |||
| repetition rate | 100 | kHz | |||
| coefficient of noise | 5.5 | dB | |||
| Polarization Related Gain | 0.5 | dB | |||
| polarization mode dispersion | 0.5 | ps | |||
| AOM | Min. | Type. | Max. | Unit | Notes |
| Operating wavelength range | 1520 | 1550 | 1580 | nm | |
| Average optical power | 0.5 | W | |||
| Maximum pulsed light power | 0.5 | kW | |||
| insertion loss | 2.5 | 3 | dB | ||
| extinction ratio | 50 | dB | |||
| Rise/fall time | 30 | ns | |||
| frequency | 80 | MHz | |||
| standing wave ratio (physics) | 1.2:1 | ||||
| Input Impedance | 50 | Ω | |||
| RF power | 2.5 | W | |||
| frequency shift | 80 | MHz | |||
| Raman amplifier | Min. | Type. | Max. | Unit | Notes |
| Laser wavelength | 1451 | nm | |||
| Output power range | 25 | 27 | dBm | ||
| Balance detector | Min. | Type. | Max. | Unit | Notes |
| bandwidths | 80 | MHz | |||
| gain (electronics) | 80 | kV/A | |||
| NEP | 30 | pW/Sqrt(Hz) | |||
DAS Integrated Module Control Software Screenshot
Fiber optic vibration monitoring system hardware
FAQ
Q：What kind of DAQ card you need for your DAS module？
A: Need at least 250M high-speed capture card. Dual Port 250MSps High-Speed DAQ For DVS/DAS
Q: What is the frequency of the AOM integrated in the DAS module?
A：By default we use 80M AOM. If a 200M AOM is required, we have available support.
Q：Do I still need to buy an AOM driver for the DAS Integration Module?
A: The AOM driver is included in the quote for our DAS Integration Module, so you don't need to purchase the AOM driver separately.
Q：DVS and DAS, what is the difference between them?
A: dvs is a qualitative measurement, detecting vibration by amplitude, but amplitude and vibration are not linear, das is phase demodulation, the demodulated phase is completely linear with vibration and can completely recover the vibration or sound signal.
Screenshot of DAS test
Related content
- [Tutorial] How to wire the DVS/DAS system installation process?
- Distributed Fiber Optic Vibration Sensing Module
- Distributed fiber optic acoustic sensing DAS module
- 100MSps high speed DAQ card for DVS
- Dual Port 250MSps High-Speed DAQ For DAS
- ultra-narrow linewidth 3k 1550nm laser
- Fiber optic vibration sensing DVS
