Abstract
The efforts for developing systems which allow for fast and sensitive acquisition of Raman spectra are part of ongoing research. For instance narrowband stimulated Raman scattering (SRS) microscopy with an OPO rapidly tuned by an electro-optical modulator over of a span of 115 cm−1 has been reported just recently [1]. We present the fast acquisition of broadband Raman spectra covering a lager range of 3400-960 cm−1 via SRS with an update rate of 19.6 Hz. For realization this fast acquisition a rapidly tunable ultra-broadband phase-matched non-collinear optical parametric oscillator (NOPO) is employed [2] which provides the required range of excitation frequencies. The NOPO is pumped by a frequency-doubled high power Yb:KLu(WO4)2 thin-disk laser oscillator with a repetition rate of 34 MHz and a pulse duration of 500fs at 1030nm [3].
© 2013 IEEE
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