Wavefront curvature sensor

The department Optics and Short Wavelengths started the ZIM project WKALAS (retention period 2012-2014) in order develop an innovative sensor concept for comprehensive laser beam characterization. By recording two beam profiles at neighbouring z-positions successively, it is possible to reconstruct the wavefront with high spatial resolution from the solution of the transport of intensity equation without the requirement of any external reference. The principle is applicable to a broad spectral range and for the visible and the near infrared, a very compact sensor has been realized. Beyond, in cooperation with DESY, the method has also been applied to the extreme UV at the free-electron laser FLASH in 2015. For the first time, it became possible to characterize the wavefront of the focused FEL beam at its waist position reaching a spatial resolution of below 1 µm.

 

 

 

Further information:

Produktflyer Wellenfront-Krümmungssensor (PDF)

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Laser-Laboratorium Göttingen e.V. (LLG)

Contact person:

Head of department
Dr. Klaus Mann
"Optics / Short Wavelengths"

Tel.: +49(0)551/5035-41
FAX: +49(0)551/5035-99
kmann(at)llg-ev.de