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Slab laser with optical pumping from a source having a narrow emitting area

  • US 4,984,246 A
  • Filed: 01/03/1990
  • Issued: 01/08/1991
  • Est. Priority Date: 01/03/1989
  • Status: Expired due to Fees
First Claim
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1. A slab laser with optical pumping from a source having a narrow emitting area, a laser comprising:

  • a laser slab having two main faces each having two edges which extend along a longitudinal direction and which are separated in a transverse direction by the width of said slab, said slab also having thickness in a pumping direction and sections in a transverse direction and the pumping direction, material of said slab being excited by pumping light arriving along said pumping direction to amplify light propagating along said longitudinal direction;

    at least one pumping source facing at least one of said main faces of said laser slab to deliver said pumping light distributed over said longitudinal direction, each of said sources emitting said light via an emitting area which is narrow relative to a laser plate, at least in said transverse direction; and

    a reflector system suitable for reflecting said pumping light to avoid cavity losses;

    wherein said emitting area of each of said pumping sources is disposed in an emission strip extending longitudinally, and facing one of said main faces at a distance from said face constituting a pumping distance d, said emission strip having two longitudinal edges; and

    said reflector system includes, for each of said emission strips, two reflectors which extend longitudinally and which interconnect, along said pumping direction, the two said edges of said emission strip with respective ones of the two said edges of a same main face facing said strip, thereby forming a light duct conveying said pumping light from said emission strip to said main face over said pumping distance, said pumping distance selected to be sufficiently great to ensure that said pumping light is substantially uniform over the width of said main face.

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