High-Resolution 32-Channel TCSPC System

Up to 32 high-resolution TCSPC modules in extension boxes to standard PC

Multichannel Parallel TCSPC Systems

  • 12, 24, or 32 Parallel TCSPC Channels
  • Each Channel Contains one SPC-150NX or SPC-180NX Module
  • All Channels Operated from One Computer
  • LabView Software, Extendable by User
  • Electrical Time Resolution 3.5 ps FWHM
  • Internal Timing Jitter <1.6 ps RMS
  • Centroid of IRF stable within <0.4 ps RMS over 100 seconds
  • Application in NIRS, fNIRS

Multi-Channel ps Diode Laser Systems

  • High-Power BDS-MM Multi-Mode ps Diode Lasers
  • Wavelengths from 640 nm to 850 nm
  • Repetition Rate 50 MHz, 20 MHz
  • CW Equivalent Power 15 mW at Near-Gaussian Pulse Shape
  • Crates with up to 8 Lasers
  • Electronic Power Control
  • Fast On-Off Capability
  • Multiplexing Capability
  • Internal Power Stabilisation
  • Control Integrated in LabView TCSPC Software

Multi-Detector Assemblies

  • Crates with Eight PMCS-150 Detectors
  • Thermo-Electric Cooling
  • NIR Photocathode
  • 100 to 120 ps FWHM IRF Width
  • Internal Overload Shutdown
  • Low Susceptibility to Magnetic Fields




NIRS and fNIRS applications require a large number of laser and detection channels with high time resolution and high timing stability. Especially in fNIRS, effects under investigation cause changes in the DTOFs of no more than a few picoseconds. It is therefore mandatory that the timing drift and, especially, the low-frequency timing wobble of the TCSPC modules is in the sub-picosecond range. Moreover, a parallel architecture is desirable to achieve high throughput and low channel crosstalk.
The bh NIRS subsystems combine the extraordinarily high timing stability of the SPC-150NX with the high throughput of a multichannel system. The systems are complemented by 8-channel laser modules and 8-channel detector modules. Each laser module contains eight BDS-MM lasers with high power, perfect pulse shape, high intensity stability, and extremely low timing drift. Each detector module contains eight PMCS-150-20 detectors with high sensitivity, fast IRF, extremely low timing shift with the count rate, and low susceptibility to magnetic fields.



The bh TCSPC Handbook
10th edition, September 2023


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