Teraxion Inc.

Jason Zweiback

Joshua E Rothenberg

Jan Popelek

Hongpu Li

William H Wang

Gershon Perelman

Mario Pacheco

Steve Montesanto

Russell Wilcox

Yunlong Sheng

Roger F Caldwell

Alexis Mendez

Yao Li

Ying Wang

HongPu Li

The invention reduces the effects of stitching errors from re-scaling or re-positioning in the fabrication of fiber Bragg gratings or the mask used in such fabrication. A first embodiment of the invention preferably uses characteristics of stitching errors to compensate for the stitching errors themselves. By increasing the number of stitching errors, errors caused by the stitching errors can be reduced. A second embodiment uses continuous writing of the desired pattern, wherein the desired pattern is snapped to a grid that can be written by the fabrication equipment. Using continuous writing eliminates stitching errors in the resulting gratings.

Lithographic method for manufacturing a mask used in the fabrication of a fiber Bragg grating

The present invention is directed to a system and method for tuning an optical fiber Bragg grating by using a circular mechanism which uniformly stretches the fiber along its length while at the same time preserving the minimal size for stretching.

Optical fiber Bragg grating tuning device

Techniques for designing efficient gratings with multiple frequency response channels based on sampled patterns based predominantly on phase modulation of the underlying grating structure. Each period of the phase sampled patterns may include contiguous, discrete phase segments with different phase values, or alternatively, a continuous spatial phase pattern that changes the phase of the underlying grating structure. Moderate amplitude modulation of the underlying grating structure by the sampling structure may also be used together with phase modulation. The grating period or the sampling period may be chirped.

Efficient sampled bragg gratings for WDM applications

The present invention is directed to a system and method for designing efficient multi-channel FBG gratings using a pre-compensated phase mask for diffracting light for side-writing the grating on an optical fiber core. A desired phase function of the FBG is generated, specifically tailored to an effective spacing between the phase mask and the optical fiber core. From the phase function a phase mask is pre-compensated to offset diffraction effects associated with each longitudinal position of the FBG receiving light from two corresponding longitudinal positions of the phase mask substantially symmetrically spaced longitudinally relative to each particular longitudinal position of the FBG. The two corresponding longitudinal positions of the phase mask are spaced longitudinally from each other by a spacing determined by the effective spacing between the phase mask and fiber core and by the first order diffraction angle of light through the phase mask.

Diffraction compensation of FBG phase masks for multi-channel sampling applications

Techniques for optically evaluating phase masks for fabricating waveguide Bragg gratings by measuring diffraction orders.

Free-space diffraction measurement of a phase mask for fabrication of a waveguide Bragg grating

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Fremont, CA, United States of America

Jason Zweiback