100 MHz balanced photodetector
Koheron PD100B is an amplified balanced detector with 39 kV/A gain, 100 MHz bandwidth and a common mode rejection ratio of 35 dB. Available in AC and DC coupled versions, with mounted InGaAs photodiodes or without photodiodes, the PD100B is ideal for applications such as Optical Coherence Tomography and Lidar sensing.
| Quantity | Price |
|---|
Resources
Specifications
| PD100B-AC | PD100B-DC | |
|---|---|---|
| Coupling | AC | DC |
| Power supply (positive) | 6 - 15 VDC | 6 - 15 VDC |
| Power supply (negative) | -15 to -6 VDC | -15 to -6 VDC |
| Small signal bandwidth | 160 Hz - 100 MHz at 3 dB (Cin = 8 pF) | 0 - 100 MHz at 3 dB (Cin = 8 pF) |
| Transimpedance gain | 39 kV / A | 39 kV / A |
| Output voltage range | ±3 V | ±3 V |
| CMRR at 1 MHz | 35 dB | 35 dB |
| Input current noise density | 8 pA / √Hz (at 10 MHz, Cin = 8 pF) | 8 pA / √Hz (at 10 MHz, Cin = 8 pF) |
| DC cutoff frequency | 160 Hz | N.A. |
| Output impedance | 50 Ω | 50 Ω |
| Outside Dimensions | 63 mm x 38 mm x 14 mm | 63 mm x 38 mm x 14 mm |
| Output | SMA | SMA |
| Mechanical details | Compatible with M6 metric breadboards (25 mm spacing) | Compatible with M6 metric breadboards (25 mm spacing) |
| InGaAs photodiodes | ||
| Wavelength range | 900 - 1700 nm | 900 - 1700 nm |
| Optical input power | 0 - 1.5 mW | 0 - 1.5 mW |
| Photodiode connector | FC | FC |
| Photodiode active diameter | 300 µm | 300 µm |
| Photodiode peak responsivity | 0.90 A / W | 0.90 A / W |
Functional diagram
Characterization
Output power spectral density
The power spectral density of the PD100B output was measured for different incident optical powers. The indicated power is the incident power per photodiode. The PD100B output is directly connected to the spectrum analyzer (Tektronix RSA306). Optical source is a Koheron LD100 laser at 1550 nm.
Common mode rejection ratio
When properly balanced, the common mode rejection ratio (CMRR) at 1 MHz of the PD100B is 35 dB. To maximize the CMRR care should be taken not only to balance the optical powers, but also the path length between the two channels.
Frequency response
Noise equivalent power
Revision history
- 2: PCB form factor update.
