Abstract
In this paper, we report the fabrication of an optical-beam combiner for stellar interferometry by means of
direct ultraviolet (UV) writing. The component is shown to have good performance (fringe contrast
> 95%, total loss ~
0.7, -40-dB crosstalk, broadband operation
covering at least the range 1.49–1.65 μm, and
low differential chromatic dispersion). The overall performance exceeds that of similar components currently used
for astronomical research. This result, combined with the fast-prototyping ability of UV writing, opens up new
possibilities for the realization of highly optimized integrated-optical components for astronomical research.
© 2007 IEEE
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