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High Sensitivity at High Bandwidth

The series HCA-S-200M Photoreceivers combine fast photodiodes with the proven and outstanding FEMTO HCA Current Amplifier technology. The HCA-S-200M is available with either a fast large area Si or InGaAs photodiode covering a spectral range from 320 to 1000 nm and 900 to 1700 nm, respectively. The amplifier transimpedance is 2 x 104 V/A resulting in a maximum conversion gain of 1.9 x 104 V/W at 1550 nm for the InGaAs model. The sophisticated DC coupled multi-stage amplifier design allows measurements from DC to a maximum bandwidth of 200 MHz corresponding to a minimum rise-time of 1.8 ns. With a NEP as low as 6 pW/√Hz signals with an optical power in the micro-Watt range can be detected without the need for further averaging.

Best Possible Solution With Customized Photoreceivers

Every application is different with its individual requirements for bandwidth, gain and responsivity. Therefore FEMTO offers customized photoreceivers with optimized specifications for a great variety of applications in addition to the standard product portfolio. After a detailed analysis we offer individual solutions at very reasonable prices and already in single quantities. Please contact us for details.

Applications

Spectroscopy Fast Pulse and Transient Measurements Optical Triggering Optical Front-End for Oscilloscopes, A/D Converters and Ultra Fast Lock-In Amplifiers

Model	HCA-S-200M-SI	HCA-S-200M-IN
Photodiode	0.8 mm Ø Si PIN	0.3 mm Ø InGaAs PIN
Spectral Range	320 ... 1000 nm	900 ... 1700 nm
Bandwidth (-3 dB)	DC ... 200 MHz	DC ... 200 MHz
Rise/Fall Time (10% - 90%)	1.8 ns	1.8 ns
Transimpedance Gain	2 x 104 V/A	2 x 104 V/A
Max. Conversion Gain	1.1 x 104 V/W (@ 800 nm)	1.9 x 104 V/W (@ 1550 nm)
Min NEP (@ 10 MHz)	10 pW/√Hz (@ 800 nm)	6 pW/√Hz (@ 1550 nm)
View and Download Datasheet	183 kB	186 kB
Output voltage ± 1.7 V max (@ 50 Ω load). Threaded M4 and 8-32 mounting holes for integration in optical bench systems. Offset adjustable by trimpot. Fiber-optic input and AC-coupling optional. Output short-circuit protected. Power supply 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.