Post holder and post not included

Features

• Si PIN and InGaAs PIN 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 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	3.0 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)
Datasheet	191 kB	176 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.