400 kHz Photoreceiver
Series LCA-S-400K
  • 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


Post holder and post not included

A New Family of Photoreceivers

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 either a large area Si or InGaAs photodiode covering a spectral range from 400 to 1100 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 Purposes Opto-Electronic Measurements
  • Optical Front-End for Oscilloscopes, A/D Converters and Lock-In Amplifiers
Model LCA-S-400K-SI LCA-S-400K-IN
Photodiode 2.5 mm Ø Si-PIN 0.5 mm Ø InGaAs-PIN
Spectral Range 400 ... 1100 nm 900 ... 1700 nm
Bandwidth (-3 dB) 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)

View and Download Datasheet

 194 kB 194 kB
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.

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