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

<table>Short-term annealing of type II-IR (white square), type I-IR (black square), type I-UV (black cirlce), grating held at each temperature for 1 hour.</table>

Laser Chemistry

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Figure 3

Figure 3: Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask 