High power fiber laser system with cladding light stripper

Details High power fiber laser system with cladding light stripper High power fiber laser system with cladding light stripper

2008-12-03

2010-11-23

Harvey, Minsun (Department: 2828)

Coherent light generators

Optical fiber laser

C385S029000, C385S124000, C385S128000

Reexamination Certificate

active

07839901

ABSTRACT:
A powerful fiber laser system is configured with at least one gain block. The gain block includes an input fiber guiding a pump light, a multiclad active fiber receiving the pump light so that a major portion is absorbed in the core of the active fiber while a minor portion of the pump light propagates in the inner cladding of the active fiber, and a multiclad output fiber. The multiclad output fiber is configured with a core, guiding a signal lased by the core of the active fiber upon absorption of the major portion of the pump light, an inner cladding receiving the minor portion of the pump light and an outer cladding. The inner and outer claddings of the multiclad output fiber have respective refractive indexes which are selected so that the refractive index of the outer cladding is higher than that one of the inner cladding. The configuration of the output fiber allows for the removal of substantially the entire light from the inner cladding of the output fiber before the signal is emitted through the downstream end of the output fiber.

REFERENCES:
patent: 5352712 (1994-10-01), Shustack
patent: 5867305 (1999-02-01), Waarts et al.
patent: 7349596 (2008-03-01), Anderergg
patent: 2009/0080835 (2009-03-01), Frith

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