# Synthesis of ultrafast waveforms using coherent Raman sidebands

## TL;DR

This paper demonstrates the synthesis of ultrafast, near-single-cycle visible pulses around 5 femtoseconds by coherently combining six Raman sidebands generated in diamond, with phase control and interferometric measurement.

## Contribution

It introduces a method to generate and phase-control multiple Raman sidebands in diamond to produce extremely short, visible-range optical pulses.

## Key findings

- Achieved 5 fs pulse duration in the visible range.
- Successfully synchronized and phase-tuned six Raman sidebands.
- Demonstrated pulse synthesis using interferometric cross-correlation techniques.

## Abstract

In this work, we implement a scheme to combine six coherent, spatially separated Raman sidebands generated in single-crystal diamond into a collinear beam. With appropriate phase tuning, this results in a pulse much shorter than the generating pump. We elucidate the characteristics of the synthesized pulse by using an interferometric collinear cross-correlation frequency-resolved optical gating setup (ix-FROG). The beating of the synchronized sidebands results in an additional component in the signal, which we use to optimize the relative phases of our sidebands. In this way, we synthesize and measure visible-range, near-single cycle isolated pulses of approximately 5 fs total pulse duration.