Fiber device having variable refractive index region proximal th

Details Fiber device having variable refractive index region proximal th Fiber device having variable refractive index region proximal th

1998-09-24

2000-08-29

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Input/output coupler

385 10, 385 12, 385124, G02B 634

Patent

active

061119997

ABSTRACT:
A device for changing the power levels of signals transmitted by an optical fiber, along with signal modulation and wavelength routing, comprises a length of optical fiber in which for a predetermined section of the length of the fiber, the fiber core is surrounded by a cladding having one or more variable refractive index (VRI) regions disposed therein in close proximity to the core. A grating region is disposed along the length of the fiber overlapping the VRI region. The VRI regions have an index of refraction lower than that of the core to change the effective index of the guided light and thereby define a tunable grating.

REFERENCES:
patent: 5864641 (1999-01-01), Murphy et al.
patent: 6011886 (2000-01-01), Abramov et al.
patent: 6021240 (2000-02-01), Murphy et al.

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