Coherent light generators – Optical fiber laser
Patent
1996-09-27
2000-01-25
Bovernick, Rodney
Coherent light generators
Optical fiber laser
385123, H01S 330
Patent
active
060185333
ABSTRACT:
The invention describes a method of single-transverse-mode generation for waveguide lasers of various kinds having a large cross section of their active core and thus providing a possibility of efficient pump of the active core region. This results in a laser beam with enhanced power and high spatial quality for high efficiency coupling to standard single-mode optical fiber networks. It is found that a multimode waveguide having a central dip of special shape in the refractive index profile of its core is able to guide a higher order mode with sharp central peak of its field carrying the considerable part on the mode energy and whose width is well compatible with the width of the fundamental mode of standard single-mode fibers. The useful properties of this higher order mode can be employed to provide the single-transverse-mode regime of generation in optical fiber lasers, integrated optical micro-lasers and various semiconductor laser sources.
REFERENCES:
patent: 5013131 (1991-05-01), Fotheringham
patent: 5170457 (1992-12-01), Jen
patent: 5210816 (1993-05-01), Iino et al.
patent: 5291501 (1994-03-01), Hanna
patent: 5574818 (1996-11-01), Krivoshlykov
Bovernick Rodney
CeramOptec Industries Inc.
Skutnik Bolesh J.
Wise Robert E.
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