Dual frequency comb photon echo spectroscopy

• DOI: 10.1364/josab.36.000223
• Publication Date: 2019-01-09T15:23:15Z
• Authors: Jonggu Jeon; JunWoo Kim; Tai Hyun Yoon; Minhaeng Cho
• Keywords: Echo (communications protocol); SIGNAL (programming language)

Dual frequency comb (DFC) nonlinear spectroscopy is an emerging technique that can be used to study a variety of molecular responses by exploiting the automatic pulse-to-pulse time delay scanning and fast data acquisition characteristics DFC techniques. Here, we propose DFC-based photon echo (DFC-PES), where two optical lasers have slightly different repetition rates are also allowed carrier frequencies. We first demonstrate our theoretical approach for linear spectroscopy. Then, signals expected from proposed DFC-PES theoretically calculated. The slight offset in pulse enables asynchronous sampling intervals between field–matter interaction events, making tuning unnecessary. Analytic expression third-order signal demonstrated dimensions simple two-level model system. has well-defined connection underlying response function exhibits down-conversion features into radio region with factor experimentally controllable.