HSA-X-S Ultra-Fast Photoreceivers

Ultra-Fast Photoreceivers
Series HSA-X-S

Si and InGaAs Photodiodes
Wavelength Range from 320 to 1700 nm
Bandwidth from 10 kHz up to 2 GHz
Max. Conversion Gain 4.8 x 10³V/W
Min. NEP approx. 14 pW/√Hz

Ultra fast photoreceivers with FEMTO’s GHz Technology

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 HSA-X-S offers an upper bandwidth limit of 2 GHz. Two models with either a fast Si or InGaAs photodiode cover a spectral range from 320 to 1000 nm and 850 to 1700 nm, respectively. Due to the sophisticated amplifier design the minimum NEP is just 14 pW/√Hz at a transimpedance of 5 x 103 V/A. This allows for the measurement of optical power levels in the ?W range with GHz speed. For the HSA-X-S-1G4-SI with silicon photodiode the effective active diameter is a remarkably large 0.8 mm due to the use of a ball lens in front of the detector chip.

Applications:

Spectroscopy
Fast Pulse and Transient Measurements
Optical Triggering
Optical Front-End for Oscilloscopes and A/D Converters

Ultra-Fast Photoreceivers

Model	HSPR-X-I-1G4-SI HSA-X-S-1G4-SI	HSPR-X-I-2G-IN HSA-X-S-2G-IN
Spectral Range	320 ... 1000 nm	900 ... 1700 nm
Bandwidth	10 kHz ... 1.4 GHz	10 kHz ... 2 GHz
Photodiode	0.8 mm Øeff. Si PIN	0.2 mm Ø InGaAs PIN
Rise/Fall Time (10% - 90%)	250 ps	180 ps
Transimpedance Gain	5 x 10³ V/A (inverting)	5 x 10³ V/A (inverting)
Max. Conversion Gain	2.5 x 10³ V/W (@ 760 nm)	4.8 x 10³ V/W (@ 1550 nm)
Min NEP	26 pW/√Hz (@ 760 nm)	14 pW/√Hz (@ 1550 nm)
Threaded M4 and 8-32 for mounting on standard posts. 25mm Ø flange compatible with microbench systems. Model with fiber optic input or DC monitor output optionally available. Output short-circuit protected. Power supply via 3-pin LEMO socket. A mating connector is provided with the device. Optional power supply PS-15 is available. For further information please view the datasheet.