| 主权项 |
1. A method for joining together a first and a second optical component, each or said first and second optical components having a respective bonding surface, the method comprising the steps of:
a) assembling the first and second optical components by direct bonding of the respective bonding surfaces thereof together, thereby defining a direct-bonded interface therebetween; and b) reinforcing said direct-bonded interface with a weld seam comprising at least one reinforcing weld line forming a closed shape enclosing a sealed direct-bonded region, said sealed direct-bonded region forming an optical transmission window, said reinforcing comprising, for each of said at least one weld line, the steps of:
1) propagating ultrashort laser pulses along an optical axis through the first optical component toward the direct-bonded interface, the ultrashort laser pulses having a spectral bandwidth within which at least the first optical component is substantially transparent, focusing said ultrashort laser pulses on a focal spot inside the second optical component near the direct-bonded interface and controlling a peak power and a repetition rate of said ultrashort laser pulses at the direct-bonded interface so as to form, through a balance between self-focusing and plasma defocusing of said ultrashort laser pulses, an optical filament across the direct-bonded interface said optical filament creating a plasma channel that induces a localized junction between said first and second optical components; and2) translating the focal spot of the ultrashort laser pulses with respect to the direct-bonded interface in a pattern defining said closed shape. |
