Coherent light generators – Optical fiber laser
Patent
1999-03-09
2000-02-29
Lee, John D.
Coherent light generators
Optical fiber laser
65477, 372 68, H01S 307
Patent
active
060318503
ABSTRACT:
A fiber laser 10 with square inner cladding 12, 29 may have a single core 11 codoped either with Ytterbium or Erbium or with Thulium and Holmium at a ratio of at least 10:1 operating in a single mode to provide eye-safe radiation with wavelengths above 1.5 micron. The single core laser has a pump clad cross sectional area about 2(10).sup.3 greater than the cross sectional area of the core. A multi-core laser has a plurality of single mode cores 28 doped with any rare earth ions, the cores equally spaced by at least two core diameters in an isometric array, in a cavity having a finesse of greater than ten, to produce a single, very bright phase-locked beam in the fundamental supermode. A method starts with hexagonal cladded-core rods 35, 36 in an isometric array, which are then fused and drawn down.
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patent: 5309452 (1994-05-01), Ohishi et al.
patent: 5473622 (1995-12-01), Grubb
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patent: 5530710 (1996-06-01), Grubb
patent: 5533163 (1996-07-01), Muendel
patent: 5566196 (1996-10-01), Scifres
Lee John D.
PC Photonics Corporation
Williams M. P.
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