US Patent No. 10,218,145

VORTEX LASER GENERATION DEVICE IN DEGENERATE CAVITY WITH SPIRAL PHASE ELEMENT AND VORTEX LASER GENERATION METHOD


Patent No. 10,218,145
Issue Date February 26, 2019
Title Vortex Laser Generation Device In Degenerate Cavity With Spiral Phase Element And Vortex Laser Generation Method
Inventorship Yuan-Yao Lin, Kaohsiung (TW)
Yen-Yin Lin, Kaohsiung (TW)
Shou-Tai Lin, Kaohsiung (TW)
An-Chung Chiang, Kaohsiung (TW)
Assignee NATIONAL SUN YAT-SEN UNIVERSITY, Kaohsiung (TW)

Claim of US Patent No. 10,218,145

1. A vortex laser generation device in a degenerate cavity with a spiral phase element, comprising:a degenerate cavity, including:
a resonator mirror configured to receive a pump beam;
a gain medium disposed behind the resonator mirror;
an optical element configured to break an azimuthal symmetry of lasers and be disposed behind the gain medium; and
an output coupler disposed behind the optical element;
wherein the pump beam is emitted into the gain medium through the resonator mirror so that the gain medium absorbs the pump beam to generate the lasers, and then the lasers pass through the optical element and reflect between the resonator mirror and the output coupler for thus being a multiple pass transverse mode to form vortex lasers, and the vortex lasers are output by transmitting through the output coupler.