We report on amorphous organic thin films that exhibit efficient third-harmonic generation at telecommunication wavelengths. At 1550nm, micrometer-thick samples generate up to 17μW of green light with input power of 250mW delivered by an optical parametric oscillator. This high conversion efficiency is achieved without phase matching or cascading of quadratic nonlinear effects. With these films, we demonstrate a low-cost, sensitive third-order autocorrelator that can be used in the time-frequency domain.
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Ramos‐Ortíz et al. (2004) studied this question.
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