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Updated: May 21, 2026

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
Published on: July 25, 2022
Sensitivity enhancement of fiber-laser-based stimulated Raman scattering microscopy by collinear balanced detection
Keisuke Nose1, Yasuyuki Ozeki, Tatsuya Kishi
1Division of Advanced Science and Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan. nose@photonics.mls.eng.osaka-u.ac.jp
Abstract:
We propose the collinear balanced detection (CBD) technique for noise suppression in fiber laser (FL)-based stimulated Raman scattering (SRS) microscopy. This technique reduces the effect of laser intensity noise at a specific frequency by means of pulse splitting and recombination with a time delay difference. We experimentally confirm that CBD can suppress the intensity noise of second harmonic (SH) of Er-FL pulses by 13 dB.The measured noise level including the thermal noise is higher by only ~1.4 dB than the shot noise limit. To demonstrate SRS imaging, we use 4-ps SH pulses and 3-ps Yb-FL pulses, which are synchronized subharmonically with a jitter of 227 fs. The effectiveness of the CBD technique is confirmed through SRS imaging of a cultured HeLa cell.
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