Micro-SPIDER is an implementation of Spectral phase interferometry for direct electric-field reconstruction (SPIDER). It has also been termed ARAIGNEE (Another Ridiculous Acronym for Interferometric Geometrically simplified Noniterative E-field Extraction). In Micro-SPIDER the spectral shear required for a SPIDER measurement is generated in a thick nonlinear crystal with carefully engineered phasematching function.
References
Micro SPIDER Wikipedia(Text) CC BY-SA