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US 10,092,980 B1Granted
Method for coupling a laser beam into a liquid-jet
AssigneeAvonisys AG
InventorsJens Guenter Gaebelein, Jeroen Hribar
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Abstract
Reliable coupling of a high-power laser beam into a liquid-jet in a liquid-jet guided laser system can be achieved with high lifetime performance of the nozzle and the protection window, through setting the parameters of the liquid-jet guided laser system according to an optimum relationship that links the focus point of the laser, the focus cone angle, the laser beam energy distribution profile and the nozzle geometry.
Claims9
A method comprising:
- providing a liquid guided laser system, wherein the liquid guided laser system comprises:
- a nozzle with a nozzle inlet for forming a liquid jet,
- a laser beam and a lens for focusing the laser beam, wherein the laser beam passes through the lens, and then through the nozzle inlet, wherein the liquid jet is configured to guide the laser beam;
- determining a laser power density profile;
- calculating a focus point for the laser beam based on a relationship between the laser power density profile and the nozzle inlet diameter;
- setting a focus of the laser beam based on the calculated focus point by adjusting the lens, wherein the adjusting of the lens is such that the lens is moveable in an upward and downward direction in relation to a nozzle inlet plane, such that the focus of the laser beam is adjusted to be below the nozzle inlet plane.
3 more elements
Dependencies are inferred from the claim text.