JPWO2018236664A5

JPWO2018236664A5 -

Info

Publication number: JPWO2018236664A5
Application number: JP2019561885A
Authority: JP
Publication date: 2023-01-05
Anticipated expiration: 2038-06-14

Description

この例では様々な比が定められ、この比は、システム１００の他の反復に適用することができる。例えば、明らかにしたように、反射面１１２Ａの曲率半径は、反射面１１７の曲率半径のほぼ３分の１とすることができ、第１の距離Ｌ１は、第２の距離Ｌ２にほぼ等しいとすることができ、第４の距離Ｌ４は、距離Ｌ１、Ｌ２、及びＬ３の合計よりも大きいとすることができる。
Various ratios are defined in this example and can be applied to other iterations of system 100 . For example, as disclosed, the radius of curvature of reflective surface 112A may be approximately one-third the radius of curvature of reflective surface 117 , and first distance L1 may be approximately equal to second distance L2. and the fourth distance L4 can be greater than the sum of the distances L1, L2, and L3.

Claims

A laser system,
a plurality of laser cavities, each cavity operable to emit an input laser beam;
a relay assembly including at least one curved reflective surface that redirects each input laser beam and reduces the beam size of the redirected beam;
a galvanometer including a curved reflective surface receiving each redirected beam and outputting a combined laser beam at a power level higher than the power level of each input laser beam;
a coupling assembly that directs the combined laser beam into an optical fiber;
including
the combined laser beam has a maximum beam parameter product that is lower than the minimum beam parameter product of the optical fiber;
The at least one curved reflective surface of the relay assembly has a first radius of curvature and the curved reflective surface of the galvanometer has a second radius of curvature, the first radius of curvature being equal to the second radius of curvature. is approximately ⅓ of the radius of curvature of the laser system.

2. The laser system of claim 1, wherein said second radius of curvature reduces spherical aberration of said combined laser beam.

each input laser beam extends (i) a first distance from one of the plurality of laser cavities to the at least one curved reflective surface of the relay assembly; (ii) the at least one of the relay assembly; emitted along a beam path comprising a second distance extending from one curved reflective surface to said reflective surface of said galvanometer; and (iii) a third distance extending from said reflective surface of said galvanometer to an optical fiber. Item 3. The laser system according to Item 1 or 2.

4. The laser system of claim 3, wherein said first distance is approximately equal to said second distance and said third distance is greater than the sum of said first and second distances.

The laser system of any one of claims 1-4, wherein the coupling assembly includes one aspheric lens or two spherical lenses.

further comprising an additional optical component positioned between the galvanometer and the coupling assembly;
The laser system of any one of claims 1-5, wherein the additional optical component comprises at least one of a beam splitter, a beam combiner, a shutter, or a black shield.

the coupling assembly outputs the combined laser beam onto an input face of an optical fiber;
The laser system of any one of claims 1-6, wherein the beam parameter product of the coupled laser beam is at least 10% less than the beam parameter product of the optical fiber at the input plane.

the relay assembly further comprising a planar reflective surface;
the at least one curved reflective surface redirects the input laser beam toward the flat reflective surface and reduces the beam size of the input laser beam at the flat reflective surface;
2. The laser system of claim 1, wherein the flat reflective surface redirects the input laser beam toward the curved reflective surface of the galvanometer.

9. The laser system of claim 8, wherein said plurality of laser cavities are fixed to a surface relative to which each reflective surface of said relay assembly is movable in at least two degrees of freedom.

each input laser beam extends (i) a first distance from one of the plurality of laser cavities to a first reflective surface; (ii) from the first reflective surface to a second reflective surface; (iii) a third distance extending from the second reflective surface to the reflective surface of the galvanometer; and (iv) a fourth distance extending from the curved reflective surface of the galvanometer to an optical fiber. 10. The laser system of claim 9, emitted along a beam path including

11. The laser system of Claim 10, wherein said first distance is approximately equal to said second distance and said fourth distance is greater than the sum of said first, second and third distances.