Novel and Improved Methods of Writing Bragg Gratings with Phase Masks
Date
1995ISSN
1041-1135Source
IEEE Photonics Technology LettersVolume
7Issue
10Pages
1183-1185Google Scholar check
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The authors demonstrate the importance of spatial coherence of the writing beam for inscribing Bragg gratings with a phase mask. Bragg gratings were written using a normal excimer laser with the fiber placed at various distances away from the phase mask. This was repeated with an excimer laser that was modified to improve the beam spatial coherence showing dramatic improvement in the ability to inscribe gratings. ‘Tunability of the inscribed Bragg grating wavelength, utilizing a single phase mask in conjunction with the improved spatial coherence of the excitation source, is demonstrated. © 1995 IEEE