HSA-X-S FAST PHOTORECEIVER SERIES HSPR-X AND-FEATURES

1. Si-PIN and InGaAs-PIN photodiodes

2. Wavelength range from 320 to 1700 nm

3. Ultra-wide bandwidth from 10 kHz up to 2 GHz

4. Max. conversion gain 4.75 x 10³ V/W

5. Min. NEP 11 pW/√Hz

By combining state of the art photodiodes with the proven and outstanding FEMTO GHz amplifier technology we designed a new family of photoreceivers with a remarkable performance. The HSPR-X and HSA-X-S offer an upper bandwidth limit of 2 GHz. Two models with either a fast Si-PIN or InGaAs-PIN photodiode cover a spectral range from 320 to 1000 nm and 900 to 1700 nm, respectively. Due to the sophisticated amplifier design the minimum NEP is just 11 pW/√Hz at a transimpedance of 5 x 10³ V/A. This allows for the measurement of optical power levels in the μW range with GHz speed.

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. For models with detector areas smaller than ? 0.4 mm, the use of fiber adapters is only recommended to a limited extent, since coupling losses and instabilities can occur. If the focus is on high-precision fiber optic measurements, using FC-models with fixed optical fiber input will usually give the best results.

Pic. 1: FST input flange with 1.035"-40 external thread and coupler ring with internal thread；Pic. 2: FS input with 25 mm round flange；Pic. 3: FC input with permanent/fixed PC/APC coupling

All HSA-X-S and HSPR-X 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.

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.