OEM Balanced Photodetector
OCT and sensor systems require high performance balanced photodetectors to boost system signal to noise ratio. The BPD-003 is specially designed for OEM applications in such fields, engineered for low cost and small size as well as high performance. The device consists of an optical head and a post-amplification board with an SMA or SMB RF output. The optical head has two input fibers aligned with a pair of balanced photodetectors, followed by an integrated ultra low noise transimpedance amplifier (TIA) placed immediately after the photodetectors to amplify received signals with low noise and enhanced CMRR. The post-amplification circuit further conditions and amplifies the signal to a range of ±3.5 V maximum. With a bandwidth of up to 200 MHz and a high conversion gain, the BPD-003 is ideal for integration into OCT, fiber sensor and high performance optical measurement systems.
Applications:
Optical Coherence Tomography
Fiber sensing interrogator
Instrumentation
R&D
Unique Features:
Ultra low noise
Excellent CMRR
High conversion gain
Wide bandwidth
Compact
Preliminary Specifications
Photodetector
Operating Wavelength
1060, 1310, or 1550 ± 50nm
Photodetector Type
InGaAs
PD Responsivity1
> 0.8mA / mW at 1550nm
> 0.7mA / mW at 1310nm
> 0.5mA / mW at 1060nm
PDL
<0.2 dB
Return Loss
>45 dB
Maximum Input Power
10 mW
RF Output
RF Output Bandwidth (3dB)2, 3
DC to 200 MHz
Transimpedance Gain4
100 × 103 V/A(TIA + post amplifier)
Conversion Gain4
> 80×103 mV/mW (1550nm)
> 70×103 mV/mW (1310nm)
> 50×103 mV/mW (1060nm)
CW Balanced
Saturation Power5
36 μW at 1550nm
42 μW at 1310nm
58 μW at 1060nm
Common Mode
> 35 dB (DC to 40MHz)
Rejection Ratio
> 15 dB (40 to 200MHz
NEP (DC - 100MHz)
<6 pW / Hz
RF Output Impedance
50 Ω
RF Output Voltage
±1.75 V at 50Ω load
Linear Range
±3.5 V at high impedance load
RF Output Connector
SMA or SMB
Power Supply
6 - pin connector header with 0.1” pitch
Input Connector
or 7 - pin SATA connector
Power Supply
±5V / 200 mA
General
Pigtail Length
>0.75m
Fiber Type
SMF - 28 for 1310 or 1550nm Hi1060 for 1060nm
Operating Temperature
10 to 50 °C
Storage Temperature
−40 to 85 °C
Dimensions
1.95” (L) × 0.85” (W) × 0.65” (H)
Notes: Values are referenced without connectors.
1. Includes the coupling loss of fiber to photodiode.
2. Tolerance =20%.
3. Other bandwidths may be available. Contact General Photonics for details.
4. Other gains are available.
5. For other transimpedance gains and wavelengths, CW Saturation Power is specified by (3.5V/Transimpedance gain)* Responsivity.
Dimensions (in inches):
Ordering Information: