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femtosecond spectroscopy
FOG100 femtosecond fluorescence up-conversion spectrometer
ExciPro femtosecond pump-probe transient absorption spectrometer
TAPPIR transient absorption pump-probe infrared spectrometer
optical scanning microscopy
MoScan-F near field scanning optical microscope platform
femtosecond Oscillators
TISSA one-box Ti: sapphire laser
TISSA Ti: sapphire laser kit
femtosecond amplifiers
MPA50 femtosecond multipass Ti: sapphite amplifier
MPA-XL  femtosecond terawatt Ti: sapphire laser system
CDP2017 optical parametric amplifier
diode laser spectroscopy
QEPAS kits and complete systems
Femtosecond Fluorescence Up-Conversion Spectrometer
  • Turnkey fluorescence up-conversion femtosecond spectroscopy system
  • Fluorescence kinetics in solutions, solid samples and thin films
  • < 100 fs temporal resolution
  • Computer controlled double monochromator
  • Fluorescence anisotropy measurements
  • Computer controlled nonlinear crystal rotation (option)
  • Computer controlled delay line alignment (option)
  • Surface Miner Pro data analysis software
Model FOG 100-DX: operation with femtosecond Ti: sapphire lasers
Model FOG 100-DA: operation with femtosecond amplifier systems


Femtosecond optical gating (FOG) methods gives best temporal resolution in fluorescence spectroscopy. The resolution is determined by a pulse width of femtosecond excitation and gate pulses and doesn't depend on a detector response function. The fluorescence kinetics from femtosecond to nanosecond time range is obtained by a scanning of the gate pulse relative to the fluorescence excitation pulse.

The sum frequency generation (also called up-conversion) in optical nonlinear crystal is used as a gating method in the FOG systems manufactured by the CDP Systems Corp. since 1997. We offer up-conversion systems to match with different types of femtosecond pulse sources and to get best spectral and dynamic ranges, sensitivity and temporal resolution.


  • Fluorescence spectral range: 320 nm – 1600 nm (depends on the excitation wavelength)
  • Pulse repetition rate: 1 kHz - 10 kHz (Model DA), 100 kHz - 100 MHz (Model DX)
  • Maximum delay between gate and excitation pulses: 2.0 ns (4.0 ns or 8.0 ns optionally)
  • Minimum step of the gate pulse: 0.52 fs
  • 106 dynamic range in photon counting mode (DX model)
  • 6x104 dynamic range in analog / digital mode (DA model)

An optional CDP 2015 third harmonic generator is recommended with FOG 100-DX for the UV sample excitation. The second harmonic generator is installed inside the FOG 100-DX optical unit

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