400 kHz Photoreceivers LCA-S-400K

Features

  • Si-PIN and InGaAs-PIN photodiodes
  • Wavelength range from 320 to 1700 nm
  • Bandwidth from DC to 400 kHz
  • Transimpedance gain  107 V/A
  • Min. NEP 75 fW/√Hz
FEMTO Low-NEP photoreceiver LCA-S-400k-SI
Model LCA-S-400K-SI-FST LCA-S-400K-IN-FST
Photodiode 3.0 mm Ø Si-PIN 0.5 mm Ø InGaAs-PIN
Spectral Range 320 - 1060 nm 900 - 1700 nm
Bandwidth (-3 dB) DC - 400 kHz DC - 400 kHz
Rise/Fall Time (10% - 90%) 900 ns 1 µs
Transimpedance 1 x 107 V/A 1 x 107 V/A
Max. Conversion Gain 5.9 x 106 V/W (@ 920 nm) 9.5 x 106 V/W (@ 1550 nm)
Min NEP (@ 10 kHz) 120 fW/√Hz (@ 920 nm) 75 fW/√Hz (@ 1550 nm)
Datasheet

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.

Customised products

Do none of the products meet your requirements? We would be happy to offer you a custom-made product designed for your application, which can also be supplied as an OEM version. Our technical support team looks forward to hearing from you. You may also find something suitable among the related products.

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 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 behaviour 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.

Compatible with optical bench (free space) and fibre optics

The free space input (FST) is designed as a 1.035″-40 threaded flange with a screw-on coupler ring. It opens up a broad compatibility with optical accessories from various manufacturers, such as lenses, tubes, cage systems, optical adapters etc.

The free-space input can be converted into fibre connections (FC, FSMA) easily by simply screwing on the fibre 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 fibre 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.

Applications

  • Spectroscopy
  • General purposes opto-electronic measurements
  • Optical front-end for oscilloscopes, A/D converters and lock-in amplifiers

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Accessories

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Power Supply

FEMTO Adapter for PRA/FCA on FST Photoreceivers

Fiber-Adapter

Spanner wrench

FEMTO Post Adapter Plate PRA-PAP

Post Adapter Plate