Balance Detector 10M-400MHz for OCT, Fiber Optic Sensing Systems, Wind Radar
This series of balanced photodetectors with fiber coupled input and SMA output, balanced photodetectors can achieve excellent common mode rejection ratio;
Huang
Email: Hqy@ybphotonics.com
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Product Info
Introduction
they are widely used in coherent detection applications for distributed fiber optic sensing, and in scenarios such as wind measurement radar.
1. Overview
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, where the two photodiodes are matched to each other for excellent common mode rejection ratio, and the detector subtracts the two detected signals to eliminate the common mode noise, so that small variations of the effective signal can be obtained from the interfering noise. The detector is available in two spectral ranges, 400-1000nm and 1000-1700nm.
2. Features
- Covers wavelength range 400-1700nm
- Compact housing
- Excellent common mode rejection ratio
- SMA output connector
3. Applications
- OCT
- DAS
- Outlier detection
- Optical delay measurement
4.Specification
Items BPD465A-10M BPD465A-75M BPD465A-200M BPD465A-400M Materials Si Wavelength 400-1000nm Input connector FC Responsivity 0.5A/W @780nm Common mode rejection ratio >25dB Bandwidth（a） DC-10MHz DC-75MHz DC-200MHz DC-400MHz Rise time（a） 36ns 4.5ns 1.8ns 1ns Gain（b） 1MV/A 165kV/A 30kV/A 10kV/A Saturated Optical power 8uw 48uw 267uw 800uw Noise voltage（a） 9mV RMS 8mV RMS 4mV RMS 3.5mV RMS NEP 4.7pW/√Hz 20.5pW/√Hz 56pW/√Hz 84pW/√Hz
Items BPD465C-10M BPD465C-75M BPD465C-200M BPD465C-400M Materials InGaAs Wavelength 1000-1700nm Input connector FC Responsivity 0.9A/W @1550nm Common mode rejection ratio >25dB Bandwidth（a） DC-10MHz DC-75MHz DC-200MHz DC-400MHz Rise time（a） 36ns 4.5ns 1.8ns 1ns Gain（b） 1MV/A 165kV/A 30kV/A 10kV/A Saturated Optical power 4.4uw 27uw 148uw 445uw Noise voltage（a） 9mV RMS 8mV RMS 4mV RMS 3.5mV RMS NEP 2.6pW/√Hz 11.4pW/√Hz 32pW/√Hz 48pW/√Hz
Paramas Detector Common Parameters Maximum output amplitude（a） ±2.0V Operating voltage ±12V Operating Current <200mA Output Impedance 50Ω Output coupling mode DC Output connector SMA female Operating temperature -20~65℃ Storage temperature -40~85℃
Remarks:
a : For 50Ω loads
b : For high resistance loads
5. Mechanical dimensions
6. Response curve
Screenshot of the oscilloscope
they are widely used in coherent detection applications for distributed fiber optic sensing, and in scenarios such as wind measurement radar.
1. Overview
The balanced photodetector contains two photodiodes and a low-noise transimpedance amplifier, where the two photodiodes are matched to each other for excellent common mode rejection ratio, and the detector subtracts the two detected signals to eliminate the common mode noise, so that small variations of the effective signal can be obtained from the interfering noise. The detector is available in two spectral ranges, 400-1000nm and 1000-1700nm.
2. Features
- Covers wavelength range 400-1700nm
- Compact housing
- Excellent common mode rejection ratio
- SMA output connector
3. Applications
- OCT
- DAS
- Outlier detection
- Optical delay measurement
4.Specification
| Items | BPD465A-10M | BPD465A-75M | BPD465A-200M | BPD465A-400M |
|---|---|---|---|---|
| Materials | Si | |||
| Wavelength | 400-1000nm | |||
| Input connector | FC | |||
| Responsivity | 0.5A/W @780nm | |||
| Common mode rejection ratio | >25dB | |||
| Bandwidth（a） | DC-10MHz | DC-75MHz | DC-200MHz | DC-400MHz |
| Rise time（a） | 36ns | 4.5ns | 1.8ns | 1ns |
| Gain（b） | 1MV/A | 165kV/A | 30kV/A | 10kV/A |
| Saturated Optical power | 8uw | 48uw | 267uw | 800uw |
| Noise voltage（a） | 9mV RMS | 8mV RMS | 4mV RMS | 3.5mV RMS |
| NEP | 4.7pW/√Hz | 20.5pW/√Hz | 56pW/√Hz | 84pW/√Hz |
| Items | BPD465C-10M | BPD465C-75M | BPD465C-200M | BPD465C-400M |
|---|---|---|---|---|
| Materials | InGaAs | |||
| Wavelength | 1000-1700nm | |||
| Input connector | FC | |||
| Responsivity | 0.9A/W @1550nm | |||
| Common mode rejection ratio | >25dB | |||
| Bandwidth（a） | DC-10MHz | DC-75MHz | DC-200MHz | DC-400MHz |
| Rise time（a） | 36ns | 4.5ns | 1.8ns | 1ns |
| Gain（b） | 1MV/A | 165kV/A | 30kV/A | 10kV/A |
| Saturated Optical power | 4.4uw | 27uw | 148uw | 445uw |
| Noise voltage（a） | 9mV RMS | 8mV RMS | 4mV RMS | 3.5mV RMS |
| NEP | 2.6pW/√Hz | 11.4pW/√Hz | 32pW/√Hz | 48pW/√Hz |
| Paramas | Detector Common Parameters |
|---|---|
| Maximum output amplitude（a） | ±2.0V |
| Operating voltage | ±12V |
| Operating Current | <200mA |
| Output Impedance | 50Ω |
| Output coupling mode | DC |
| Output connector | SMA female |
| Operating temperature | -20~65℃ |
| Storage temperature | -40~85℃ |
Remarks:
a : For 50Ω loads
b : For high resistance loads
5. Mechanical dimensions
6. Response curve
Screenshot of the oscilloscope
