- Si and InGaAs Photodiodes
- Wavelength Range from 400 to 1700 nm
- Bandwidth from DC to 400 kHz
- Max. Conversion Gain 107 V/W
- Min. NEP 75 fW/√Hz
A New Family of Photoreceivers
By combining state of the art Si and InGaAs photodiodes with the proven and outstanding FEMTO LCA Current Amplifier technology we designed a new family of photoreceivers with a remarkable performance. The LCA-S-400K is available with either a large area Si or InGaAs photodiode covering a spectral range from 400 to 1050 nm and 900 to 1700 nm, respectively. The amplifier transimpedance is 107 V/A resulting in a maximum conversion gain of 9.5 x 106 V/W at 1550 nm for the InGaAs model. Due to the low noise performance of the transimpedance amplifier the minimum NEP is as low as 75 fW/√Hz which allows for detection of optical signals in the nanoWatt range without further averaging.
Applications
- Spectroscopy
- General Purpose opto-electronic measurements
- Optical Front-End for Oscilloscopes, A/D Converters and Lock-In Amplifiers
Photoreceivers – Low Noise
| Model | LCA-S-400K-SI | LCA-S-400K-IN |
| Spectral Range | 400 ... 1100 nm | 900 ... 1700 nm |
| Bandwidth | DC ... 400 kHz | DC ... 400 kHz |
| Rise/Fall Time (10% - 90%) | 1 µs | 1 µs |
| Transimpedance Gain | 1 x 107 V/A | 1 x 107 V/A |
| Max. Conversion Gain | 6.2 x 106 V/W (@ 900 nm) | 9.5 x 106 V/W (@ 1550 nm) |
| Min NEP (@ 10 kHz) | 130 fW/√Hz (@ 900 nm) | 75 fW/√Hz (@ 1550 nm) |
| Saturation Power | 1.6 μW (@ 900 nm) | 1 μW (@ 1550 nm) |
| Detector | Si PIN, Ø2.5 mm | InGaAs PIN, 0.5 mm Ømin |
| Input | Free Space, 25 mm Ø Flange | |
| Output | BNC | |
| Output Voltage Range | ± 10 V @ > 1 MΩ Load | |
| Power Requirements | ± 15 V, + 15 mA Typ. | |
| CAB-LN1 Low Noise Input/Output Cable available. Threaded M4 and 8-32 holes for mounting on standard posts. 25 mm Ø flange compatible with microbench systems. Offset adjustable by trimpot. Fiber optic input optional. Output short-circuit protected. Power supply via 3-pin LEMO socket. A mating connector is provided with the device. Optional power supply PS-15 is available. For further information please view the datasheet. |
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