Optical-fiber amplifier having high-saturation output

Details Optical-fiber amplifier having high-saturation output Optical-fiber amplifier having high-saturation output

1996-10-30

1999-03-02

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

372 6, 372 10, H01S 300, H01S 311

Patent

active

058778900

ABSTRACT:
The present invention features a light-pumped, single-mode, pulse- or continuous-wave amplifier, or a Q-switch, with each having a high-saturation output power. The amplifier or Q-switch has a light-pumped, optical fiber having active ions that are either annularly located within the cladding or adjacent the core/cladding interface. Pump-light and an input signal are coupled to the fiber via a dispersive or biconically-tapered coupler. The light-pumped fiber provides stored energy, with an induced emission in the excited-state population that is relatively low for the given amount of energy stored. The central part of the core both stores and propagates whatever light is present, due to induced emission, which takes place only in the annular region. The light that is incident on the fiber is of sufficient intensity so that, despite the low rate of induced emission per unit of light intensity, a significant power increase occurs.

REFERENCES:
patent: 3636473 (1972-01-01), Young
patent: 5058976 (1991-10-01), DiGiovanni et al.
patent: 5155621 (1992-10-01), Takeda et al.
patent: 5291501 (1994-03-01), Hanna
patent: 5373576 (1994-12-01), Minns et al.
patent: 5467218 (1995-11-01), Takeda et al.
patent: 5469292 (1995-11-01), Bjarklev et al.
patent: 5485480 (1996-01-01), Kleinerman
patent: 5491581 (1996-02-01), Roba

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