Large signal three-level superfluorescent fiber sources

Details Large signal three-level superfluorescent fiber sources Large signal three-level superfluorescent fiber sources

1992-06-10

1993-02-09

Epps, Georgia Y.

Coherent light generators

Optical fiber laser

372 69, 372 70, 372 71, 372 75, 385 39, 385 8, 385 9, H01S 330

Patent

active

051857499

ABSTRACT:
There is disclosed a new superfluorescent source comprising a long fiber doped with a lasing material presenting three-level transitions, such as Erbium. Due to the ground state signal absorption present in three-level systems, the source of the present invention can achieve backward signal quantum efficiencies well in excess of the limit of 0.5 exhibited by four-level systems. The source can be used in a Sagnac interferometer which may comprise an optical isolator because of possible high feedback.

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