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Two-photon absorption-induced effects in femtosecond coherent anti-Stokes Raman-scattering microspectroscopy of silicon photonic components |
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| Authors: | V P Mitrokhin A B Fedotov A A Ivanov A A Podshivalov P K Kashkarov M V Alfimov K Sakoda A M Zheltikov |
| Institution: | (1) Physics Department, Moscow State University, Moscow, 119992, Russia;(2) International Laser Center, Moscow State University, Moscow, 119992, Russia;(3) Center of Photochemistry, Russian Academy of Sciences, ul. Novatorov 7a, Moscow, 117421, Russia;(4) Kurchatov Institute Russian Research Center, pl. Kurchatova 1, Moscow, Russia;(5) National Institute for Materials Science, Tsukuba University, 1-1 Namiki, Tsukuba 305-0044, Japan |
| Abstract: | We study the effects related to two-photon absorption (TPA) in the microspectroscopy of the silicon photonic components based on coherent anti-Stokes Raman scattering (CARS) of femtosecond pulses. With 300-fs pulses of 1.24-μm Cr:forsterite laser radiation delivering pump and probe fields and a frequency-shifted soliton output of a large-mode area photonic-crystal fiber employed as a Stokes field, pronounced TPA effects have been observed in the CARS microspectroscopy of silicon components for pump-pulse intensities exceeding 10 GW/cm2. |
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