Abstract
Proper alignment is critical to obtain the desired performance from focused spatially chirped beams, for example in simultaneous spatial and temporal focusing (SSTF). We present a simple technique for inspecting the beam paths and focusing conditions for the spectral components of a broadband beam. We spectrally resolve the light transmitted past a knife edge as it was scanned across the beam at several axial positions. The measurement yields information about spot size, , and the propagation paths of different frequency components. We also present calculations to illustrate the effects of defocus aberration on SSTF beams.
© 2015 Optical Society of America
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