DAS-BPD Balanced Photodetector Coherent Detection Applications
DAS-BPD series balanced photodetectors are specially tuned for distributed fiber optic sensing DAS system, which is very suitable for coherent detection applications.
Huang
Email: Hqy@ybphotonics.com
Product Info
Introduction
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, in which the two photodiodes are matched to each other for excellent common mode rejection ratio
1. Overview
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, in which the two photodiodes are matched to each other for excellent common mode rejection ratio, and the detector removes the common mode noise by subtracting the two detected signals, so that small changes in the effective signal can be obtained from the interfering noise.
2. Features
- Covers wavelength range 1000-1700nm
- Compact housing
- Excellent common mode rejection ratio
- SMA output connector
3. Applications
- OCT
- DAS
- Outlier Detection
- Optical Delay Measurement
4. Specifications
Items DAS-BPD-200M Materials InGaAs Wavelength 1000-1700nm Input connector FC Responsivity 0.9A/W @1550nm Common mode rejection ratio >20dB Bandwidth (a) DC-200MHz Rise time (a) 2ns Gain (b) 50kV/A NEP (c) 2.6pW/√Hz Maximum output amplitude（a） ±1.0V Operating voltage ±12V Operating Current <200mA Output Impedance 50Ω Output coupling mode AC Output connector SMA female Operating temperature -20~65℃ Storage temperature -40~85℃
Remarks:
a For 50Ω loads
b For high resistance loads
c At 80MHz
5. Mechanical dimensions
6. Response curve
Oscilloscope screenshot in DAS application
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, in which the two photodiodes are matched to each other for excellent common mode rejection ratio
1. Overview
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, in which the two photodiodes are matched to each other for excellent common mode rejection ratio, and the detector removes the common mode noise by subtracting the two detected signals, so that small changes in the effective signal can be obtained from the interfering noise.
2. Features
- Covers wavelength range 1000-1700nm
- Compact housing
- Excellent common mode rejection ratio
- SMA output connector
3. Applications
- OCT
- DAS
- Outlier Detection
- Optical Delay Measurement
4. Specifications
| Items | DAS-BPD-200M |
|---|---|
| Materials | InGaAs |
| Wavelength | 1000-1700nm |
| Input connector | FC |
| Responsivity | 0.9A/W @1550nm |
| Common mode rejection ratio | >20dB |
| Bandwidth (a) | DC-200MHz |
| Rise time (a) | 2ns |
| Gain (b) | 50kV/A |
| NEP (c) | 2.6pW/√Hz |
| Maximum output amplitude（a） | ±1.0V |
| Operating voltage | ±12V |
| Operating Current | <200mA |
| Output Impedance | 50Ω |
| Output coupling mode | AC |
| Output connector | SMA female |
| Operating temperature | -20~65℃ |
| Storage temperature | -40~85℃ |
Remarks:
a For 50Ω loads
b For high resistance loads
c At 80MHz
5. Mechanical dimensions
6. Response curve
Oscilloscope screenshot in DAS application
