Ashton BJ, Canning J, Groothoff N. Two-point source interferometric grating writing.
APPLIED OPTICS 2004;
43:3140-3144. [PMID:
15176203 DOI:
10.1364/ao.43.003140]
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Abstract
A novel grating-writing interferometer is demonstrated. This interferometer is compact, stable, and tunable well over 1000 nm and does not suffer from the inherent path-length differences that are present in other methods. It allows for high-quality gratings to be inscribed by preventing light from unwanted orders from affecting the fringe pattern. This technique is used to introduce a novel method of apodization based on removing the Fresnel end reflections in a grating. The experimental evidence proves the concept and shows that the technique is potentially useful for Bragg-grating inscription.
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