Phase-engineered fibers for use in generating cylindrical...

Details Phase-engineered fibers for use in generating cylindrical... Phase-engineered fibers for use in generating cylindrical...

2011-05-10

2011-05-10

Peng, Charlie (Department: 2883)

Optical waveguides

Polarization without modulation

C385S127000

Reexamination Certificate

active

07941012

ABSTRACT:
A phase-engineered fiber is described for generating a cylindrically polarized beam. The fiber includes a core region, a ring region surrounding the core region, and an outer cladding region surrounding the ring region. The fiber regions are configured to cause the fiber to have a refractive index step proximate to the peak amplitude value of the mode intensity profile of an LP11mode guided by the fiber. The refractive index step is sufficiently steep such that at least one of the cylindrically polarized TM01and TE01eigenmodes has an effective refractive index neffthat is sufficiently separated from the respective effective refractive index of the other eigenmodes to allow coupling to the at least one cylindrically polarized eigenmode with minimal coupling to the other eigenmodes.

REFERENCES:
patent: 5852701 (1998-12-01), Kato et al.
patent: 6181858 (2001-01-01), Kato et al.
patent: 7483612 (2009-01-01), Digiovanni et al.

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