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

Claim 17:
18. A sensing system comprising:
a laser source configured to generate a mid-infrared laser beam based on (1) a first laser device, which generates a first laser beam having a first wavelength, (2) a second laser device, which generates a second laser beam having a second wavelength, which is different from the first wavelength, and (3) a non-linear crystal that receives simultaneously the first and second laser beams and generates a mid-infrared laser beam having a third wavelength, which is larger than each of the first and second wavelengths;
a moving mechanism configured to move the non-linear crystal along a direction perpendicular to the first and second laser beams to change the third wavelength within a given wavelength range, which is defined by an incident position of the first and second laser beams along the width of the non-linear crystal, and the given wavelength is between 11.56 and 15 μm;
a chamber configured to receive a chemical element to be measured, wherein the mid-infrared laser beam is configured to enter the chamber; and
a sensor configured to receive the mid-infrared laser beam after exiting the chamber and also configured to determine a wavelength or intensity of the mid-infrared laser beam.