Patent ID: 9497843
Filing Date: 2016-11-15
CPC Classification: G21B,H05H,Y02E

Claim Text:
1. A method for forming a laser guiding structure, comprising: activating a plurality of gas flows from a corresponding plurality of gas nozzles arranged at equal angular intervals around a central axis, the gas nozzles being configured to produce a plurality of gas flows that intersect with one another along the central axis to controllably form a gas channel from the neutral gas, the gas channel having gas density depression at a center of the gas channel; and at time t wherein at least one of a geometric configuration of the gas nozzles and a backing pressure of the gas flows is configured to cause the gas channel to have a predetermined gas density profile such that the ionized gas channel forms a plasma channel having a predetermined spatial profile, the plasma channel forming a laser guiding structure configured to guide a laser pulse having predetermined spatial parameters fired into the gas along the central axis at time t