US 12,259,632 B2
Optical assembly for enlarging spectral bandwidths and reducing ultrashort pulses
Keming Du, Aachen (DE)
Appl. No. 18/017,675
Filed by Keming Du, Aachen (DE)
PCT Filed Jun. 30, 2021, PCT No. PCT/EP2021/000074
§ 371(c)(1), (2) Date Jan. 24, 2023,
PCT Pub. No. WO2022/022847, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 10 2020 004 501.4 (DE), filed on Jul. 26, 2020.
Prior Publication US 2023/0296959 A1, Sep. 21, 2023
Int. Cl. G02F 1/35 (2006.01)
CPC G02F 1/3525 (2013.01) [G02F 1/3503 (2021.01); G02F 1/3542 (2021.01); G02F 1/3505 (2021.01); G02F 2203/50 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical arrangement for enlarging spectral bandwidths by nonlinear self-phase modulation for shortening ultrashort pulses, wherein a multipass cell and a nonlinear medium are used, wherein the nonlinear medium is arranged within the multipass cell, and a laser beam having ultrashort pulses passes through the nonlinear medium multiple times, wherein the laser beam is coupled into the multipass cell by way of a shaping optical unit, wherein the laser beam is shaped into an astigmatic beam and coupled into the multipass cell by way of the shaping optical unit.