  Light with transverse polarization structure, such as radial and azimuthal
polarization, enables and revives lots of applications based on light-matter
interaction due to their unique focal properties. To date, studies referring to
this topic mainly concentrate in weak-light domain, yet it should have gained
more attention in strong-light domain. A main factor contributing to the
current situation is that the generation devices cannot afford high power.
Here, in this proof-of-principle work, we demonstrate the generation of strong
single-longitudinal-mode (SLM) cylindrical vector (CV) short pulses via
stimulated Brillouin amplification, specifically, the energy is transferred
from a 700 ps pump to a 300 ps Stokes pulse via parametrically generated
coherent phonons. After amplification, a 100 mJ-level SLM CV pulse light with
300 ps duration is obtained. Meanwhile, the phase and polarization structures
are high fidelity maintained. This result provides a practicable way to
generate strong CV light, and by extending this mechanism into multi-pump beam
combing system, even an ultra-high intensity CV light can be expected.

Optics