Femtosecond pulse temporal overlap estimation and adjustment in SSFS-based CARS system

We present and verify a residual-pump-based temporal overlap estimation method in soliton self-frequency shift-based coherent anti-Stokes Raman scattering system. The residual pump light, output by a highly nonlinear photonic crystal fiber, acts as a crucial link between the pump and Stokes pulses d...

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Bibliographic Details
Published in:IEEE access 2019-01, Vol.7, p.1-1
Main Authors: Zhang, Yongning, Jiang, Junfeng, Wang, Shuang, Liu, Kun, Ma, Zhe, Gu, Gaofei, Hui, Rongqing, Liu, Tiegen
Format: Article
Language:English
Subjects:
Automobiles
CARS
Coherent scattering
Crystal fibers
Cyclohexane
Delays
Femtosecond pulses
Fiber nonlinear optics
Frequency shift
GNLSE
interference
Nonlinear optics
Optical pulses
Optical pumping
Optical solitons
Photonic crystals
Raman scattering
Raman spectra
Solitary waves
Ultrafast optics
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Summary:We present and verify a residual-pump-based temporal overlap estimation method in soliton self-frequency shift-based coherent anti-Stokes Raman scattering system. The residual pump light, output by a highly nonlinear photonic crystal fiber, acts as a crucial link between the pump and Stokes pulses during the temporal overlap estimation. The wavelength-dependent optical delay is estimated to be 0.141 ps/nm when the Stokes wavelength is 900 nm ∼ 1050 nm according to the temporal overlap estimation method. The actual measurement result is 0.138 ps/nm based on the nonresonant signal from a microscope slide, which is very close to the estimated result. In addition, the Raman resonant signals of liquid cyclohexane at 2853 cm-1, 2923 cm-1 and 2938 cm-1 have also been successfully detected at the predicted optical delays 427.27 ps and 428.17 ps.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2940587