Ultra Fast GHz Photoreceiver Series HSA-X-S

Ultra Fast Photoreceiver
Series HSA-X-S

Post holder and post not included

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 900 to 1700 nm, respectively. Due to the sophisticated amplifier design the minimum NEP is just 14 pW/√Hz at a transimpedance of 5 x 10³V/A. This allows for the measurement of optical power levels in the µW 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

Model	HSA-X-S-1G4-SI	HSA-X-S-2G-IN
Photodiode	0.8 mm eff. Ø Si PIN	0.2 mm eff. Ø InGaAs PIN
Spectral Range	320 ... 1000 nm	900 ... 1700 nm
Bandwidth (-3 dB)	10 kHz ... 1.4 GHz	10 kHz ... 2 GHz
Rise/Fall Time (10%-90%)	250 ps	180 ps
Transimpedance Gain	5 x 10³ V/A	5 x 10³ V/A
Max. Conversion Gain	2.5 x 10³ V/W (@ 760 nm)	4.8 x 10³ V/W (@ 1550 nm)
Min NEP (@ 100 MHz)	26 pW/√Hz (@ 760 nm)	14 pW/√Hz (@ 1550 nm)
Available Input Options	Free Space (FS) or FC	Free Space (FS) or FC
View and Download Datasheet	217 kB	207 kB
Output voltage 1.9 Vp-p max. (@ 50 Ω load). Units with DC monitor output 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.