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Lågbrus med InGaAs PD, 400 kHz, Free space

Artikelnr.: LCA-S-400K-IN-FS

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  • Si and InGaAs Photodiodes 
  • Wavelength Range from 900 to 1700 nm 
  • Bandwidth from DC to 400 kHz 
  • Max. Conversion Gain 10^7 V/W 
  • Min. NEP 75 fW/√Hz

900..1700nm photodiode, 9.5x10^6 V/W gain, NEP as low as 75 fW/√Hz, saturation power 1 µW.

Photoreceiver LCA-S-400K-IN-FS

By combining state of the art 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 a large area Si photodiode covering a spectral range from 900 to 1700 nm. The amplifier transimpedance is 10^7 V/A resulting in a maximum conversion gain of 9.5 x 10^6 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.

Standard delivery time: 3 weeks ARO, Conditions: Ex.Works Germany unless specified

0.5 mm Ø InGaAs PIN
Spectral Range
900 ... 1700 nm
Bandwidth (-3 dB)
DC ... 400 kHz
Rise/Fall Time (10% - 90%)
1 µs
Transimpedance Gain
1 x 10V/A
Max. Conversion Gain
9.5 x 106 V/W (@ 1550 nm)
Min NEP (@ 10 kHz)
75 fW/√Hz (@ 1550 nm)


Output voltage ±10 V max (@ 1 MΩ load). Offset adjustable by trimpot. Units with fiber optic input or AC coupling are optionally available. Output short-circuit protected. Threaded M4 and 8-32 mounting holes for use with standard mounting posts. Power supply ±15 V via 3-pin Lemo® socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet or contact FEMTO.