Single- and multimode VCSELs operating with continuous relief kinoform for focussed spot-array generation
- 1 November 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (11) , 1466-1468
- https://doi.org/10.1109/68.634710
Abstract
We report the use of both single- and multimode VCSELs operating at 850 nm as the illumination source for a continuous-relief diffractive optical element (DOE) fabricated in resist on quartz. The system produces a 4/spl times/4 array of focussed spots from a single optical input. The uniformity error was found to be /spl sim/10% in all cases, and the overall system efficiency /spl sim/35% A single spot-coupling efficiency of 70% into a multimode fiber placed 20 mm from the DOE was also measured.Keywords
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