Optical-Pump THz-Probe Systems

Time-domain terahertz platform synchronized with a femtosecond laser
Our Optical-Pump THz-Probe (OPTP) Systems enable high-precision time-resolved terahertz spectroscopy, providing direct insight into ultrafast material dynamics. By exciting a sample with a femtosecond optical pump pulse and probing its response with a synchronized terahertz pulse, OPTP measurements reveal changes in conductivity, refractive index, and transmission on sub-picosecond timescales. This makes the technique ideally suited for studying charge carrier dynamics, phonons, and light-matter interactions in semiconductors, molecular systems, and advanced functional materials.
The systems combine a femtosecond pump laser with our TeraFlash pro terahertz platform, both systems being optically synchronized to ensure excellent timing stability and minimal jitter. Pump wavelengths from the UV, visible and infrared range provide flexibility for a wide range of excitation schemes. An integrated delay stage allows precise control of the pump–probe timing, enabling reproducible and intuitive time-domain measurements.
With broadband terahertz detection covering approximately 0.1 to 6.5 THz at a superior dynamic range, our OPTP systems deliver reliable, non-contact, and non-destructive probing. Modular configurations and customization options allow the system to be tailored to specific experimental requirements, from fundamental research to applied material characterization. 

Your Benefits

The right pump laser for your material
Depending on the bandgap of the material under test, you can choose a "pump" laser across a wide wavelength range, from the ultraviolet to the infrared.
Excellent time resolution, minimum jitter
The femtosecond "pump" pulses and the THz "probe" pulses are generated by the same oscillator, in other words: optically synchronized. This ensures the lowest possible jitter between pump excitation and probe detection. TOPTICA's proprietary synchronization technology is compatible with the entire portfolio of FemtoFiber lasers at 80 MHz (repetition rate of the TeraFlash pro).

Applications

THz material research
Semicon inspection & metrology

Options

Chose your pump laser
Pick the right femtosecond laser wavelength from our FemtoFiber ultra product family. From 390 nm to 1560 nm.
Optical-Probing
For experiments requiring two synchronized ultrafast optical pulses without terahertz probing, customized optical-pump optical-probe solutions are also available. 
Integrated delay line
Adjust the relative timing between optical pump and THz probe pulses. This optional delay line integrated in the TeraFlash pro dual gives you 500 ps total scan range.
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