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FluoPulse™ Cube is one of the core components of the FluoPulse (Fluorescence lifetime fiber photoemtry (FLiP)) system. The cube contains optics, excitation lasers, and photodetectors for high temporal precision lifetime measurements. In addition, the cube comes with swappable bandpass and neutral density filters. Two 1-color configuration cubes can be driven by a single FluoPulse™ console.

Users can customize the FluoPulse™ Cube according to experimental needs (see Biosensor Tab):

  • Up to three excitation lasers (405, 450, 488nm)
  • Up to two detection windows
    • cyan: 475-525 nm
    • green: 500-540 nm
    • red: 580-600 nm*
    • custom**
  • Optional Optogenetic port (628-642mm) for a 638nm laser

For simplicity and optimal measurements, we recommend using the FluoPulse™ Calibration Sample when calibrating the system.

* In the configuration with red fluorophore, please note that Doric does not provide the 561 nm laser source. Contact us for more details on the laser requirements.
**contact us for custom excitation window and excitation lasers, e.g. yellow, far-red & infrared

Here is a list of some of the most common fluorescence lifetime biosensors. In particular, we've highlighted the biosensors that have already been successfully used by clients with the FluoPulse™ system. Note that we've also included some bioRxiv papers showcasing latest innovations.

This paper, also has a more exhaustive summary: https://www.mdpi.com/2079-6374/13/10/939 but it's from 2023.

Lifetime Biosensor Substrate Excitation Δ tau (ns) ΔF/F0 < 2x* Test with Doric Reference
Tq-Ca-FLITS Calcium 450 nm ~1.6 ns https://www.nature.com/articles/s41467-021-27249-w
G-Ca-FLITS Calcium 488 nm ~1 ns   https://www.biorxiv.org/content/10.1101/2024.11.05.622032.full.pdf
RCaMP1h Calcium 560 nm ~0.1 ns x   https://www.cell.com/cell-metabolism/fulltext/S1550-4131(17)30421-7
LifeCamp Calcium 488 nm ~1 ns ?   https://www.biorxiv.org/content/biorxiv/early/2025/12/25/2025.12.23.696288.full.pdf
dLight3.8 Dopamine 488 nm ~0.1 ns x ✓ (can saturate)* https://www.biorxiv.org/content/biorxiv/early/2024/11/11/2024.11.11.622990.full.pdf
GRAB-Ach3.0 Ach 488 nm ~0.1 ns x   https://www.science.org/doi/full/10.1126/sciadv.adi0643
Rncp-iGluSnFR1 Glutamate 560 nm ∼0.6 ns x   https://www.sciencedirect.com/science/article/abs/pii/S0026265X25009257
FLIM-AKAR PKA 488 nm ~0.2 ns https://www.nature.com/articles/s41598-024-53313-8
CKAR3 PKC 450 nm ~0.4 ns   https://www.nature.com/articles/s41467-025-61729-7.pdf#page=1.25
sDarken Serotonin 488 nm ~0.5 ns x   https://www.biorxiv.org/content/10.1101/2024.01.04.574197.full.pdf
iGlucoSnFR-TS Glucose 405 nm ~0.1 ns https://pmc.ncbi.nlm.nih.gov/articles/PMC6565483/pdf/nihms-1526614.pdf
LiLac Lactate 450 nm ~1.2 ns   https://static-content.springer.com/esm/art%3A10.1038%2Fs41467-022-30685-x/MediaObjects/41467_2022_30685_MOESM1_ESM.pdf
sR-TOLLEC pH 450 nm 0.8 ns   https://www.biorxiv.org/content/10.64898/2025.12.25.693346v1.full.pdf
qMaLioffG ATP 488 nm 488 ns   https://www.biorxiv.org/content/10.1101/2023.08.29.555275v1.full.pdf#page=9.74

*An ideal biosensor should have an intensity change under two-fold, for optimal FluoPulse™ detector range (prevent saturation) and for accurate lifetime measures. Generally, FRET-FLIM biosensors meet this criterion, while biosensors that were generated from intensity biosensors do not. When using biosensors with large intensity changes, care must be taken to avoid saturation (adjust titre, detector gain and excitation power).

FluoPulse™ Cube

Built-in detectors
Wavelength detection range F1 500 to 540 nm
Wavelength detection range F2 580 to 600 nm
Built-in laser diodes
Excitation wavelength options 405, 450, 488 nm
Maximum Average Power - 40 µW @ 405 nm
- 30 µW @ 450 nm
- 20 µW @ 488 nm
Pulse Duration 450 ps
Pulse Repetition Rate 400 kHz
Fiber connection
Optical fiber core diameter 200 or 400 µm
NA 0.37
Optical fiber port connector Sample Port:FC/APC
Optogenetic port (optionnal): FC/PC
Physical properties
Dimensions Cube (width x depth x height) without knobs, connectors 165 x 76 x 51 mm
Mass Cube 950 g
Drawing

Fluorescence Lifetime Photometry Cube 4

Fluorescence Lifetime Photometry Cube 6

Fluorescence Lifetime Filter

User Manuals Fr En

FluoPulse™



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