Optical waveguides – Having particular optical characteristic modifying chemical...
Patent
1997-12-22
2000-11-28
Lee, John D.
Optical waveguides
Having particular optical characteristic modifying chemical...
372 6, 359341, G02B 600, H01S 307
Patent
active
061545988
ABSTRACT:
An optical waveguide laser, preferably a fiber laser, has unintentionally incorporated impurities disposed in the lasing medium which upconvert a portion of the lasing radiation to radiation of shorter wavelength, thereby introducing defects in the medium which result in increased absorption due to photodarkening. Suitable rare-earth co-dopants are intentionally incorporated during the manufacture of the fiber for effectively shunting the upconversion process. The lifetime of the fiber laser is thereby increased.
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Gavrilovic Pavle
Goyal Anish K.
Po Hong
Singh Shobha
Grodt Thomas P.
Hao Victoria D.
Lee John D.
Polaroid Corporation
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