Fiber optic devices having volume Bragg grating elements
Fiber optic devices including volume Bragg grating (VBG) elements are disclosed. A fiber optic device may include one or more optical inputs, one or more VBG elements, and one or more optical receivers. Methods for manufacturing VBG elements and for controlling filter response are also disclosed. A VBG chip, and fiber optic devices using such a chip, are also provided. A VBG chip includes a monolithic glass structure onto which a plurality of VBGs have been recorded.
1. A method for manufacturing a Bragg grating element, the method comprising:
forming a Bragg grating wafer having a Bragg grating recorded therein, said Bragg grating being characterized by a grating wave vector; and
segmenting the Bragg grating wafer into a plurality of individual Bragg grating elements, wherein each of the individual Bragg grating elements retains the grating wave vector of the Bragg grating wafer.
2. The method of claim 1 , wherein segmenting the Bragg grating wafer comprises dicing the Bragg grating wafer into the plurality of individual Bragg grating elements.
3. The method of claim 1 , wherein the Bragg grating wafer is made of a photosensitive glass.
4. The method of claim 3 , wherein the Bragg grating wafer is made of a photosensitive glass containing at least one of the group consisting of silicon oxide, aluminum oxide, and zinc oxide.
5. The method of claim 3 , wherein the photosensitive glass includes silver, an alkali oxide, fluorine, and at least one of the group consisting of chlorine, bromine, and iodine.
6. The method of claim 5 , wherein the photosensitive glass includes cerium oxide.
7. The method of claim 1 , wherein the Bragg grating wafer contains a reflective Brag grating.
8. The method of claim 7 , wherein the individual Bragg grating elements are reflective Bragg grating elements.
9. The method of claim 1 , wherein the Bragg grating wafer contains a transmissive Bragg grating.
10. The method of claim 9 , wherein the individual Bragg grating elements are transmissive Bragg grating elements.
11. The method of claim 1 , wherein the Bragg grating wafer contains an apodized Bragg grating.
12. The method of claim 1 , wherein the Bragg grating wafer has a dimension of three or more individual Bragg grating elements.
13. The method of claim 1 , wherein segmenting the Bragg grating wafer comprises sawing the Bragg grating wafer into the plurality of individual Bragg grating elements.
14. The method of claim 12 , wherein dicing the Bragg grating wafer comprises dividing the Bragg grating wafer along each of a first direction and a second direction.