Laser 2000

Pre-Amplifier Module

PicoQuant Logo

Pre-Amplifier Module

  • Fast rise time / wide bandwidth
  • Low jitter
  • Ideal for low output fast photon detectors like MCP and PMT
  • 3 dB bandwidth up to 1.8 GHz
  • Gain up to 25 dB
  • Gain flatness of ± 1.0 dB
  • P1dB up to 12.5 dBm
  • Overload indicator


The PAM 102 pre-amplifier is specially targeted at timing sensitive applications such as Time-Correlated Single Photon Counting (TCSPC) with fast photon detectors like Microchannel Plate PMTs (MCP) or standard PMTs. Such detectors produce very small output pulses with extremely short pulse widths, usually too small for direct interfacing with TCSPC electronics or other counters.

Amplifier parameters matched to common detector types
The pulse rise times (or fall times) of fast photon detectors are typically 150 ps to 500 ps, and the pulse widths (FWHM) are correspondingly small. Therefore, an amplifier with an appropriately fast rise time is needed between the detector and the timing discriminator of the TCSPC system. The rise time of an amplifier is directly related to its bandwidth. A fast rise time corresponds to a wide bandwidth. On the other hand, the wider the bandwidth, a pre-amplifier contributes more electronic noise to the signal. All amplitude noise on the signal adds to the timing jitter, when the signal is processed by a timing discriminator of the TCSPC electronics. This is because the signal is not infinitely steep and any fluctuation in amplitude will be translated to a timing uncertainty inversely proportional to the steepness dV/dt of the timing edge of the signal. There are, therefore, contradicting demands for the selection of the appropriate amplifier bandwidth. Best timing resolution is usually achieved when the amplifier rise time is comparable to the detector rise time. For common modern detectors this corresponds to an optimum amplifier bandwidth of 1 GHz to 2 GHz as used in the PAM 102.

Different pre-amplifier for different detector types
The PAM 102 is available in two different versions: A 20 dB Gain version for PMTs (T-version) and a 25 dB Gain version for MCP-PMTs (Mi-version). Those two version differ in the threshold level for the overload protection signal. All PAM 102 come with a wide range input (110-240V AC) power supply unit. Signal input and output are standard 50 Ohms SMA connectors. The housing is gold plated for maximum RF immunity.


PAM 102-T PAM 102-Mi
Puls polarity Inverting Inverting (for MCP-PMTs)
Gain 20 dB 25 dB
Bandwidth 2 GHz 1 GHz
1 dB compression + 3.7 dBm + 12.5 dBm
Overload threshold – 100 µA – 0.1 µA
Amplitude +/- 100 mV max.
Connectors, input & output
Type 50 Ohm SMA female
Power Supply
Line voltage 110/240 VAC, 50/60 Hz
Power consumption max. 15 Watts
Dimensions 62 × 51 × 27 (w × d × h)


All Information given here is reliable to our best knowledge. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearances are subject to change without notice.

PAM 102 Datasheet

Request a Demo

PAM 102

Ask the Expert

If you’re interested in the products shown here, or have questions about something you can’t find on our website, please get in touch through the form below.

Our knowledgeable sales team will be happy to help. We can normally source exactly what you need, or work with you to come up with custom solutions.

Alternatively, just call +44 (0) 1933 461 666 and ask to speak to the Photonics team.