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Method and system for homogenizing diode laser pump arrays

Patent ·
OSTI ID:1107571
An optical amplifier system includes a diode pump array including a plurality of semiconductor diode laser bars disposed in an array configuration and characterized by a periodic distance between adjacent semiconductor diode laser bars. The periodic distance is measured in a first direction perpendicular to each of the plurality of semiconductor diode laser bars. The diode pump array provides a pump output propagating along an optical path and characterized by a first intensity profile measured as a function of the first direction and having a variation greater than 10%. The optical amplifier system also includes a diffractive optic disposed along the optical path. The diffractive optic includes a photo-thermo-refractive glass member. The optical amplifier system further includes an amplifier slab having an input face and position along the optical path and separated from the diffractive optic by a predetermined distance. A second intensity profile measured at the input face of the amplifier slab as a function of the first direction has a variation less than 10%.
Research Organization:
LLNL (Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States))
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344;
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Number(s):
8,547,632
Application Number:
12/544,147
OSTI ID:
1107571
Country of Publication:
United States
Language:
English

References (4)

Rational design of a diffractive homogenizer for a laser beam journal January 2002
Efficient beamshaper homogenizer design combining diffractive optical elements, microlens array and random phase plate journal January 1999
Diffractive optical elements in photosensitive inorganic glasses
  • Efimov, Oleg M.; Glebov, Leonid B.; Smirnov, Vadim I.
  • International Symposium on Optical Science and Technology, SPIE Proceedings https://doi.org/10.1117/12.446892
conference November 2001
Laser beam shaping by holographic optical elements conference February 2012

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