LCA-S-400K 400 KHZ PHOTORECEIVER SERIES-Features

1. Si-PIN and InGaAs-PIN photodiodes

2. Wavelength range from 320 to 1700 nm

3. Bandwidth from DC to 400 kHz

4. Transimpedance gain 10⁷ V/A

5. Min. NEP 75 fW/√Hz

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 320 to 1060 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.

Thanks to the very low-noise behavior of the transimpedance amplifier, the minimum NEP is only 75 fW/√Hz. This facilitates detection of optical signals in the 100 pW range without additional measures such as averaging or similar, and all this with a bandwidth of 400 kHz.

The free space input is designed as a 1.035"-40 threaded flange with a screw-on coupler ring (FST) or as a 25 mm round flange without thread (FS). Both types open up broad compatibility with optical accessories from various manufacturers, such as lenses, tubes, cage systems, optical adapters etc.

The FST free-space input can be converted into fiber connections (FC, FSMA) easily by simply screwing on the fiber adapter of the PRA series.

The relatively large-area detector facilitates optical focusing in free-space applications and ensures a high and stable degree of coupling when using the optionally available fiber optic adapter.

All LCA-S photo receivers are equipped with UNC 8-32 and M4 threaded holes and can therefore be conveniently and stably integrated into optical systems on standard rod holders. The optionally available adapter plate PRA-PAP opens up further mounting options.

Output voltage ±10 V max (@ 1 MΩ load). Offset adjustable by trimpot. 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.