Bandwidth-Unlimited, Dispersion-Free Tunable Optical Delay Using a Prism Pair

TL;DR

This paper introduces a novel prism pair system that provides nearly unlimited bandwidth, dispersion-free, tunable optical delays with a high delay-bandwidth product, overcoming traditional limitations of optical delay methods.

Contribution

The authors demonstrate a nearly perfect, bandwidth-unlimited, dispersion-free tunable optical delay system using a prism pair, breaking conventional constraints on delay-bandwidth product and tunability.

Findings

Delay-bandwidth product of ~7x10^4 with 25-fs pulses

Delay time is independent of signal bandwidth

Technique overcomes traditional optical delay limitations

Abstract

We report a nearly perfect bandwidth-unlimited, dispersion-free tunable optical delay system using a prism pair. The observed delay-bandwidth product using a 25-femtosecond light pulse is ~7x104, where the delay time is independent of the signal bandwidth. The present technique breaks from the conventional methods constrained by delay-bandwidth product, nontunability, and delay time dependent optical loss.