femtoControl



Pulse Compression & Dispersion Compensation for Microscopy


Dispersion Control

femtoControl is a compact motorized dispersion compensation unit for optimization of the duration of femtosecond laser pulses in the spectral range of Ti:Sapphire lasers. Femtosecond pulses which pass through any kind of optical material experience dispersion that can lead to temporal broadening of the ultrashort pulses with subsequent reduction in peak power. Thus, the experimental conditions are changed and degraded.

femtoControl compensates for material dispersion by applying the inverse amount of dispersion to the pulse. This is generated by a pair of prisms on motorized translation stages allowing continuous adjustment of the pulse length.

At a Glance

  • Ideal for multi-photon microscopy
  • Wide range of dispersion compensation
  • User-friendly operation
  • Zero GVD (Group Velocity Dispersion) function
  • Automated prism drive corresponding to stored GVD curves
  • Also available as femtoControl Kit to cover extreme GDD (Group Dispersion Delay) ranges as well as special wavelengths

Basics about Pulse Compression

Read about the basics of pulse compression, dispersion, prism & grating compressor, GVD


Dispersion Correction for Multi-photon Microscopy

femtoControl can help to achieve more crisp and clearer microscope images especially for multi-photon microscopy. Laser pulses with a pulse duration in the ultrafast range. i.e. < 10 picoseconds (ps) are stretched by the dispersion of the optical material when passing through optical components like windows or lenses. Elaborate dispersion management by the means of a pulse compressor can compensate this effect. APE developed femtoControl, a compact pulse compressor for efficient, easy-to-use and remote controlled optimization of the pulse duration. FemtoControl operates following the principle of a four-prism compressor. Without further adjustment  and without changing the interval between the prisms femtoControl is able to continuously compensate negative as well as positive dispersion that Ti:Sapphire laser pulses in the wavelength range of 690 to 1100 nm with input lengths between 80 to 200 femtoseconds (fs) may suffer from.


Specifications

femtoControl Specification    
femtoControl KitDispersion Ranges that require very large
beam paths as well as special wavelength ranges
can be easily realized with the femtoControl Kit
Wavelength range680 ... 1080 nm
Other wavelengths can be realized with the femtoControl Kit
Beam diameter< 4 mm
Transmission> 90 % @ 800 nm
Input Polarizationlinear / horizontal (polarization rotator optional)
Laser Repetition Rateany
Bandwidth (for Total Compensation)< 12.5 nm @ 800 nm
(approx. 75 fs transform limited Gaussian pulse;
higher bandwidth on request)
Dispersion RangeCenter Wavelengthminmax
700 nm0 ...approx. 23000 fs^2
800 nm0 ...approx. 13000 fs^2
900 nm0 ...approx. 8000 fs^2
Dispersion Ranges that require very large beam
paths can be easily realized with the
femtoControl Kit
Additional Internal Beam Path1.67 m

Datasheets & Brochures

femtoControl (pdf / english)


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