Patent ID: 7609437
Filing Date: 2009-10-27
Classification: H01S,H04B

Abstract:
1. An optical amplifier apparatus comprising: a first front-end optical fiber amplifier that amplifies incident light; a first front-end pumping light source that generates first pumping light supplied to said first front-end optical fiber amplifier; a first front-end pumping light introducing section that introduces the first pumping light to said first front-end optical fiber amplifier; a first back-end optical fiber amplifier that amplifies outgoing light of said first front-end optical fiber amplifier; a second front-end optical fiber amplifier; a second front-end pumping light source that generates second pumping light supplied to said second front-end optical fiber amplifier; a second front-end pumping light introducing section that introduces the second pumping light to said second front-end optical fiber amplifier from an outgoing side which is opposite to an incident side; a second back-end optical fiber amplifier that amplifies outgoing light of said second front-end optical fiber amplifier; a back-end pumping light source that generates third pumping light supplied to said first back-end optical fiber amplifier; a back-end pumping light introducing section that introduces the third pumping light to said first back-end optical fiber amplifier; and an optical connecting section that (1) connects an outgoing side of said first back-end optical fiber amplifier and said back-end pumping light introducing section to each other, or (2) connects the outgoing side of said first back-end optical fiber amplifier and the incident side of said second front-end optical fiber amplifier to each other and the outgoing side of said second back-end optical fiber amplifier and said back-end pumping light introducing section to each other, wherein said first front-end pumping light introducing section is disposed between said first front-end optical fiber amplifier and said first back-end optical fiber amplifier; and wherein said second front-end pumping light introducing section is disposed between said second front-end optical fiber amplifier and said second back-end optical fiber amplifier.