Full dispersion measurement with
FRINGER
a powerful 2D interferogram processing software

 

 

Features ·        Captures and evaluates interferograms ·        High precision measurement of material dispersion and angular dispersions ·        Triggerable ·        Real time operation ·        Save images in various formats ·        Cross section evaluation ·        Region of interest (ROI) ·        Easy control of camera functions ·        Requires low input laser power / pulse energy

 

            There are numerous ways how Spectrally and Spatially Resolved Interferometry (SSRI) can be useful for you. Designed for capturing and evaluation of spectrally and spatially resolved interference fringes, Fringer can measure spectral phase shift and angular dispersion of ultrashort pulses by extreme accuracy. The two-dimensional feature of the detector allows you to explore any spatial dependence along the beam diameter. Real-time evaluation of the interference patterns and triggered exposition of images are also possible with CEOptics’ Fringer.

            Although an SSRI measurement requires a two-beam interferometer with the object of interest positioned into the sample arm before the spectrograph; non-interferometric measurements also provide great opportunity for beam diagnostics and alternative angular dispersion measurement (with only an extra achromat needed for focusing).

 

Possible optical layouts for measurements with FRINGER.

 

Phase dispersion measurement feature	Angular dispersion measurement feature

 

 

Specifications:

Group delay (GD) 3):                            range                                                           accuracy	-300 to 300 fs < 0.5 %
Group delay dispersion (GDD) 3):          range                                                           accuracy	-103 to 103 fs2 < 1 %
Third order dispersion (TOD) 3):            range                                                           accuracy	-4·104 to 4·104 fs3 < 3 %
Fourth order dispersion (FOD) 3):           range                                                           accuracy	-107 to 107 fs3 < 15 %
Propagation direction angular dispersion 3), 4):	< 0.1 µrad/nm
Phase front angular dispersion 3):	< 0.1 µrad/nm
Spectral range 3) :	150 nm – 20 µm
Image formats:	bmp, jpeg, png, tif, ascii
Operation system 5):	Windows XP Linux
Minimum system requirements 5):	P4 processor, 1GB RAM

¹⁾ : Inverted Mach-Zehnder Interferometer: PhADIM

²⁾ : Available on request

³⁾: The range and accuracy depend on the specifications of the imaging spectrograph. The displayed values are for color depth of 10 bit, spectral resolution of 0.1 nm, spatial resolution of 3.3 μm and around 800 nm.

⁴⁾: For an achromatic lens of a focal length 50cm and a beam size of 3 mm.

⁵⁾: Depends also on the detector specifications of the spectrograph.

 

Accessories (optional)

• PhADIM, a phase front angular disperion measurement unit.
• MePS, high accuracy beam rotator for 2D characterisation of the beam.
• Combined with a real 2D spectrograph (e.g. CEO-2D-800 by CEOptics).