Patent ID: 11914267
Assignee: POLITECNICO DI MILANO
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A method for generating a mid-infrared laser beam with a laser source, the method comprising:
injecting a first laser beam having a first wavelength into a non-linear crystal;
injecting a second laser beam having a second wavelength, which is different from the first wavelength, into the non-linear crystal; and
moving the non-linear crystal, perpendicular to the first and second laser beams, to generate a third laser beam that has a third wavelength, which is larger than each of the first and second wavelengths,
wherein the non-linear crystal has a length and a width, and a variable poling period is distributed across the width so that the third wavelength varies within a given wavelength range, and
wherein the given wavelength range is between 11.56 and 15 μm.