Photoplethysmography (PPG) is a simple optical technique for detection of blood volume changes in the microvascular bed of a biological tissue 1. Currently, PPG is actively used to assess different ...
We demonstrate how a scheme called advanced dual-chirped optical parametric amplification (DC-OPA) that employs two kinds of nonlinear crystal (BiB 3 O 6 and MgO-doped lithium niobate) can generate ...
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