FemtoFiber Technology for Pump-Probe Spectroscopy
- Time resolved spectroscopy
- Multi-beam configuration
- Coherent, synchronized beams
- Ultrashort pulses < 15 fs
- Wavelength coverage 488 nm – 2200 nm
Pump-probe spectroscopy was honored with the 1999 nobel prize awarded to Ahmed Zewail. In femtochemistry, ultrafast dynamics of molecules are visualized with snap shots delivered by femtosecond lasers: in a first step, a laser pulse pumps the population of a molecule into an excited state. The state itself exhibits relaxation dynamics in the femtosecond or picosecond time regime. In a second step, another laser pulse probes the population in the excited state at different time delays in respect to the excitation. This step-by-step analysis reveals the dynamics of the excited state and led to the term "pump-probe". During the last decade the focus shifted from pure observation to active control and manipulation of dynamical reactions: So-called coherent control methods are employed. These are based on shaping the spectral phase of the laser pulses with spatial light modulators. The excitation with shaped laser pulses results in quantum interference phenomena like the specific break of chemical bonds in molecules.
TOPTICA contributes to this field with newest fiber technology which is outstanding in performance and versatility. A single laser system can be equipped with up to three outputs that are optically synchronized down to the attosecond level. These can be configured individually to adapt to the experimental needs: Pulse durations as short as 15 fs or broad tuning ranges of 490 nm to 700 nm, 850 nm to 1000 nm or 980 nm to 2200 nm are available.
- Brochures: Ultrafast Fiber Lasers
- Publications: Synthesis of a single cycle of light with compact erbium-doped fibre technology
- Publications: Femtosecond few-fermion dynamics and deterministic single-photon gain in a quantum dot
- Publications: 8-fs pulses from a compact Er:fiber system: quantitative modeling and experimental implementation
- Publications: Attosecond relative timing jitter and 13 fs tunable pulses from a two-branch Er:fiber laser