Abstract-Adaptive spatiotemporal optical pulse front tilt using a digital micromirror device and its terahertz application

Kosuke Murate, Mehraveh Javan Roshtkhari, Xavier Ropagnol, and François Blanchard

https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-9-2090&origin=search

We report a new method to temporally and spatially manipulate the pulse front tilt (PFT) intensity profile of an ultrashort optical pulse using a commercial microelectromechanical system, also known as a digital micromirror device (DMD). For our demonstration, we show terahertz generation in a lithium niobate crystal using the PFT pumping scheme derived from a DMD chip. The adaptive functionality of the DMD could be a convenient alternative to the more conventional grating required to generate a laser beam with a PFT intensity profile that is typically used for efficient optical rectification in noncollinear phase-matching conditions. In contrast to a grating, PFT using DMD does not suffer from wavelength dispersion, and exhibits overlap properties between grating and a stair-step echelon mirror.

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