Gakushuin University 1 article published in JoVE Chemistry Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems Tomohisa Takaya*1, Koichi Iwata*1 1Department of Chemistry, Faculty of Science, Gakushuin University Details of signal generation and optimization, measurement, data acquisition, and data handling for a femtosecond time-resolved near-IR stimulated Raman spectrometer are described. A near infrared stimulated Raman study on the excited-state dynamics of β-carotene in toluene is shown as a representative application.