摘要:
In a laser module, a laser beam which is emitted from a laser element is focused by a condensing optical system and caused to enter an incidence end of an optical fiber. A laser device is provided with a plurality of these laser modules. Emission end portions of the optical fibers are bundled to form a laser emission portion. A thickness of cladding h of each optical fiber is set to a value calculated in accordance with the following equation: 1 cladding thickness null null null h null ( emission null null null light null null null amount of null null null one null null null laser null null null module null null null W required intensity null null null C null packing ratio null null null P - core diameter null null null t ) null 2 As a result, it is possible to emit a laser-beam with a high intensity that is required for functionality as a laser light source, for the purpose of raising resolution of an exposure apparatus.
摘要:
A combined-laser-light source includes: a plurality of semiconductor lasers; an optical fiber; and an optical system which converges a bundle of laser beams emitted from the plurality of semiconductor lasers, and makes the converged bundle of the laser beams enter the core of the optical fiber so that the laser beams are combined in the optical fiber when the laser beams pass through the optical fiber. The optical system is aligned with the optical fiber so that the converged bundle of the laser beams is incident on an area of an end face of the core when steady temperature control is performed on the combined-laser-light source, where the area is concentric with the end face of the core, and has a diameter equal to or smaller than half of the diameter of the core.
摘要:
A fiber module includes: a package having a structure which allows sealing of the inside of the package; and an optical fiber having a predetermined length and being fixed to the package in such a manner that the first end of the optical fiber appears inside the package. The cladding is exposed (bare) in a vicinity of the second end, and the optical fiber other than a portion of the cladding in the vicinity of the second end is coated with at least one of a metal and an inorganic material.