US 12,076,276 B2
Cutting device with optical coupler including a polarisation corrector
Emmanuel Baubeau, Saint Etienne (FR); and Sylvie Nadolny, Saint Etienne (FR)
Assigned to KERANOVA, Saint Etienne (FR)
Appl. No. 17/627,827
Filed by KERANOVA, Saint Etienne (FR)
PCT Filed Jul. 17, 2020, PCT No. PCT/EP2020/070302
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/013734, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 1908208 (FR), filed on Jul. 19, 2019.
Prior Publication US 2022/0257413 A1, Aug. 18, 2022
Int. Cl. A61F 9/008 (2006.01); A61B 18/20 (2006.01); A61B 18/22 (2006.01)
CPC A61F 9/008 (2013.01) [A61B 18/201 (2013.01); A61B 2018/2227 (2013.01); A61F 2009/0087 (2013.01); A61F 2009/00872 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A cutting apparatus for cutting human or animal tissue, said apparatus including:
a laser source configured for emitting a treatment laser beam in the form of pulses,
a shaping system positioned downstream of the laser source, configured for transforming the treatment laser beam into a single phase-modulated treatment laser beam, wherein the shaping system modulates the phase of the wavefront of the treatment laser beam according to a modulation set value calculated to distribute the energy of the single phase-modulated treatment laser beam into at least two impact points forming a pattern in a focusing plane,
an optical coupler between the laser source and the shaping system, wherein the optical coupler includes a photonic crystal fiber, and
a polarization corrector mounted between the laser source and the shaping system, and configured for modifying the polarization of the treatment laser beam upstream of the optical coupler, wherein the polarization of the treatment laser beam downstream of the optical coupler corresponds to a desired reference polarization, and wherein the polarization corrector comprises:
a sensor configured for measuring a polarization variation between an input end of the optical coupler and an output end of the optical coupler, and
a polarization modifier configured for modifying the polarization of the treatment laser beam upstream of the optical coupler so as to compensate for the measured polarization variation.