Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask

<table>Isochronal annealing study of an FBG in the polyimide coated OFS fiber.</table>

Laser Chemistry

Figure 15: Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask 