Rapid Passage Signals from CO2 at 1.6 µm Using a Dual Chirped- Pulse Electro-Optic Comb System with High-Order Interleaving

Abstract

We demonstrate a method for interleaving high-order sidebands in a fast-sweeping electro-optic dual-comb system. We probe CO2 at 1.6 µm and show sweep-rate dependent rapid- passage effects modeled with the Maxwell-Bloch equations.(/p)(p)Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States.

Interleaved electro-optic dual comb generation to expand bandwidth and scan rate for molecular spectroscopy and dynamics studies near 1.6 µm

“…Typically, to reduce contamination from the higher order modes, low MW amplitudes (<Vπ/4) are used which limits the 1 st -order coverage of EOMs to twice the bandwidth of the MW source [43,44]. To take advantage of the order scaling of chirped pulse EO-DOFCs, a new method for interleaving [45,46] is needed to ensure the unique one-to-one mapping of each order into the RF region. An additional element of agility of chirped pulse EO-DOFCs is the precise control of the speed of coverage or sweep rate which can be easily changed by several orders of magnitude depending on the desired application [23].…”