Draw Tower Gratings (DTG®s) are fibre Bragg gratings produced using a process that combines the drawing of the optical fiber with the writing of the grating. This process of simultaneously drawing the fiber, writing the grating and coating the fiber directly after the grating inscription, results in high strength grating chains. As such the commonly used stripping and recoating process of standard FBGs is not necessary and the pristine fiber strength is maintained during the DTG® manufacturing process.


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