Figure 1 | Principle of Bessel light bullet enabled-stimulated Raman scattering microscopy. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Principle of Bessel light bullet enabled-stimulated Raman scattering microscopy.

Caption

By introducing positive and negative angular dispersions on the Fourier plane, forward- and backward-propagating Stokes and pump Bessel light bullets are generated. The generated Bessel light bullets have much slower group velocities and much shorter beam lengths than conventional Bessel beam pulses. Thus, the depth-encoded SRS signal can be immediately retrieved by decoding the spatial information whereby the two Bessel light bullets meet in the sample for SRS 3D imaging.

To accomplish the task, they developed angular dispersion control schemes to generate counter-propagating Stokes and pump Bessel light bullets with positive and negative vg, respectively. The phase pattern displayed on the SLM is made up of two annular gratings with different grating periods and opposite blazed angles for the Stokes and pump beams.

Credit

by Shulang Lin, Li Gong, Zhiwei Huang

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License

CC BY

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