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

<table>Schematic representation of lens-fiber-phase mask geometry for waveguide exposures.</table>

Laser Chemistry

Figure 1: Induced Bragg Gratings in Optical Fibers and Waveguides Using an Ultrafast Infrared Laser and a Phase Mask 