Femtosecond Fluorescence Upconversion and TCSPC Module HARPIA-TF

  • Femtosecond-to-microsecond measurements
  • Automated switching between fluorescence upconversion and TCSPC
  • Automated spectral scanning and calibration
  • Optional operation as a stand-alone unit


  • Femtosecond-to-microsecond measurements
  • Automated switching between fluorescence upconversion and TCSPC
  • Automated spectral scanning and calibration
  • Optional operation as a stand-alone unit

The HARPIA-TF is a time-resolved fluorescence measurement module that combines fluorescence upconversion and TCSPC techniques. In fluorescence upconversion, the signal from the sample is mixed in a nonlinear crystal with a gating femtosecond pulse to achieve high temporal resolution, which is limited by the duration of the gate and pump pulses. For fluorescence decay times in the nanosecond to microsecond range, the instrument can be used in time-correlated single‑photon counting (TCSPC) mode to measure kinetic traces up to 5 μs. The combination of the two methods enables the measurement of spectrally-resolved fluorescence decay in the femtosecond to microsecond range. Using a high repetition rate PHAROS or CARBIDE laser, the fluorescence dynamics can be measured while exciting the samples with pulse energies down to several nanojoules.

Extension Module HARPIA-TF
Mode Kerr gate Fluorescence upconversion TCSPC
Spectral range 250 – 1000 nm 330 – 1600 nm 320 – 820 nm 1)
Temporal resolution 400 – 500 fs ≤ laser pulse duration or better < 180 ps 2)
Max measurement range 8 ns ∞ 3)
Delay resolution 8.3 fs
Gate beam requirements 15 – 25 μJ n/a
Compatible with TCSPC Kerr gate or fluorescence upconversion
  1. Spectral range is extendable to NIR; contact sales@lighton.com for details.
  2. High-speed detector available (< 50 ps); contact sales@lighton.com for details.
  3. Maximum measurement range depends on the phosphorescence signal.
Extension Module Physical dimensions (L × W × H)
HARPIA-TF 571 × 275 × 183 mm

Dopamine Photochemical Behaviour under UV Irradiation

A. Falamaş, A. Petran, A. Hada, and A. Bende, International Journal of Molecular Sciences 10 (23), 5483 (2022).

Electron–Hole Binding Governs Carrier Transport in Halide Perovskite Nanocrystal Thin Films

M. F. Lichtenegger, J. Drewniok, A. Bornschlegl, C. Lampe, A. Singldinger, N. A. Henke, and A. S. Urban, ACS Nano (2022).

Intrachain photophysics of a donor–acceptor copolymer

H. Nho, W. Park, B. Lee, S. Kim, C. Yang, and O. Kwon, Physical Chemistry Chemical Physics 4 (24), 1982-1992 (2022).

Large π-Conjugated Metal–Organic Frameworks for Infrared-Light-Driven CO2 Reduction

J. Zeng, X. Wang, B. Xie, Q. Li, and X. Zhang, Journal of the American Chemical Society 3 (144), 1218-1231 (2022).

Novel Synthetic Dopamine Analogues: Carbon-13/Nitrogen-15 Isotopic Labeling and Fluorescence Properties

C. Lar, S. Radu, E. Gál, A. Fălămaş, J. Szücs‑Balázs, C. Filip, and A. Petran, Analytical Letters, 1-13 (2022).

Size-dependent spectroscopic insight into the steady-state and time-resolved optical properties of ZnO photocatalysts

A. Falamas, I. Marica, A. Popa, D. Toloman, S. Pruneanu, F. Pogacean, F. Nekvapil, T. D. Silipas, and M. Stefan, Materials Science in Semiconductor Processing 145, 106644 (2022).

Light-Modulated Cationic and Anionic Transport Across Protein Biopolymers

A. Burnstine‑Townley, S. Mondal, Y. Agam, R. Nandi, and N. Amdursky, (2021).

Long-range light-modulated charge transport across the molecular heterostructure doped protein biopolymers

S. Mondal, N. Ghorai, S. Bhunia, H. N. Ghosh, and N. Amdursky, Chemical Science (2021).


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HARPIA-TF Femtosecond Fluorescence Upconversion and TCSPC Module

Product datasheet.

Rev. 05/01/2022. Size 395 KB.

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Broshure & datasheet.

Rev. 06/09/2022. Size 8.1 MB.

HARPIA Selection Guide

HARPIA components selection guide.

Rev. 14/11/2021. Size 1.1 MB.

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Product catalog.

Rev. 16/09/2022. Size 15.2 MB.


Product catalog in Chinese.

Rev. 16/09/2022. Size 15.8 MB.