Patent ID: 6043930
Filing Date: 2000-03-28
Classification: G02B,H01S

Abstract:
An optical amplifier, comprising:an optical waveguide structure including a first region in which a first dopant is doped in a first glass composition and a second region in which a second dopant and a third dopant are doped in a second glass composition;first means for pumping said first dopant so that said optical waveguide structure provides a first gain characteristic determined by said first glass composition and said first dopant; andsecond means for pumping said third dopant so that said optical waveguide structure provides a second gain characteristic determined by said second glass composition and said second dopant, said second gain characteristic being different from said first gain characteristic;one of said first and second regions being surrounded by the other;said second dopant being pumped by energy transfer from said third dopant pumped with said second means.