High power high efficiency cladding pumping fiber laser

Details High power high efficiency cladding pumping fiber laser High power high efficiency cladding pumping fiber laser

2008-01-22

2008-01-22

Nguyen, Dung (Department: 2828)

Coherent light generators

Optical fiber laser

C372S066000, C372S700000, C385S123000

Reissue Patent

active

RE040019

ABSTRACT:
delete-start id="DEL-S-00001" date="20080122" ?In the present invention, methods and apparatus for making efficient cladding pumping fiber lasers is disclosed. In particular, new fiber cladding geometry and new method of coupling pumping laser into an optical fiber are disclosed. Both aspects of the present invention will facilitate the realization of high-efficiency and high-power fiber lasers. In the present invention, cladding boundary geometry structures that can prevent the formation of local modes are disclosed. Besides the cladding geometry, methods for efficient coupling of diode lasers into a laser fiber for high power injection are also disclosed. Essentially, the new methods make it possible to transmit diode laser beams for a long distance with substantially the same brightness. In other words, with the methods and apparatus disclosed, a laser beam from a laser diode array with collimating structures can be transmitted for a long distance while the beam spot dimension including beam divergence can be kept substantially unchanged even if the beam from said array is not substantially collimated. With the method taught in the present invention, laser diode array modules can be formed with laser diode arrays (LDA) with collimating structures and relay systems. Because of the brightness conservation nature of the modules, when a plurality of such modules (such as 3, 9 or more than 200 pieces) are combined, the beams from the arrays can be efficiently coupled into an optical fiber. Thus the pumping laser coupling method can be used for the construction of high-efficiency and high-power fiber lasers. Thus, the fiber lasers of this invention may comprise of a fiber laser core doped with active species, a symmetry-broken inner cladding or a multiple-imaging inner cladding surrounding said core, a plurality of brightness substantially-conserved laser diode array module for coupling the beam from said laser diode array module into said inner cladding.delete-end id="DEL-S-00001" ?insert-start id="INS-S-00001" date="20080122" ?An apparatus for a high efficiency cladding pumping fiber laser component includes a laser fiber having a core doped with active species disposed along an axis. A symmetry-broken inner cladding surrounds said core for transmitting optical energy from the inner cladding to said core. The symmetry-broken inner cladding has a substantially rectilinear cross-section with respect to the axis with at least two pair opposing sides. At least one side of each pair of each opposing sides is disposed in nonparallel relationship to its respective opposed side whereby the inner cladding has a symmetry-broken cross-section shape that minimizes local modes in the inner cladding.insert-end id="INS-S-00001" ?

REFERENCES:
patent: 4428647 (1984-01-01), Sprague et al.
patent: 4520472 (1985-05-01), Reno
patent: 4815079 (1989-03-01), Snitzer et al.
patent: 5139609 (1992-08-01), Fields et al.
patent: 5185758 (1993-02-01), Fan et al.
patent: 5333077 (1994-07-01), Legar et al.
patent: 5533163 (1996-07-01), Muendel
patent: 5568577 (1996-10-01), Hardy et al.
patent: 5579422 (1996-11-01), Head et al.
patent: 5592333 (1997-01-01), Lewis
patent: 5594752 (1997-01-01), Endriz
patent: 5612969 (1997-03-01), Dombi
patent: 5619522 (1997-04-01), Dube
patent: 5761233 (1998-06-01), Bruesselbach et al.
patent: 5790310 (1998-08-01), Huang
patent: 5793783 (1998-08-01), Endriz
patent: 5802092 (1998-09-01), Endriz
patent: 5825803 (1998-10-01), Labranche et al.
patent: 5978407 (1999-11-01), Chang et al.
patent: 6075912 (2000-06-01), Goodman
patent: 6215598 (2001-04-01), Hwu
Muendel, “35 Watt CW Singlemode Ytterbium Fiber Laser at 1.1 um.” CLEO '97 Postdeppline Paper CPD 30 Baltimore MD 1997.

Affiliated with

Also associated with

Rating

High power high efficiency cladding pumping fiber laser does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High power high efficiency cladding pumping fiber laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High power high efficiency cladding pumping fiber laser will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2804686