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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 8 — Mar. 10, 1999
  • pp: 1302–1310

Design, Fabrication, and Evaluation of a Multichannel Diffractive Optic Rotary Joint

Mathias Johansson and Sverker Hård  »View Author Affiliations


Applied Optics, Vol. 38, Issue 8, pp. 1302-1310 (1999)
http://dx.doi.org/10.1364/AO.38.001302


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Abstract

A multichannel diffractive optic rotary joint was designed, fabricated by electron-beam lithography, and evaluated with regard to cross talk and to output signal power variations. High cross-talk margin (>25 dB) and low output signal power variations (<2 dB) were achieved. The sensitivity to input-light-beam wavelength uncertainty was investigated. Two design examples are presented. The first design eliminates cross talk due to unwanted diffraction orders and shows that for a ten-channel joint the wavelength uncertainty of an 850-nm emitting laser must be less than 8 nm. In the second design cross talk due to the second diffraction order is permitted, which results in a tolerance level that is three times better for wavelength uncertainty.

© 1999 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.3740) Optical design and fabrication : Lithography
(230.0230) Optical devices : Optical devices

Citation
Mathias Johansson and Sverker Hård, "Design, Fabrication, and Evaluation of a Multichannel Diffractive Optic Rotary Joint," Appl. Opt. 38, 1302-1310 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-8-1302


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References

  1. J. A. Speer and W. W. Koch, “The diversity of fiber optic rotary connectors (slip rings),” in Components for Fiber Optic Applications II, V. J. Tekippe, eds. Proc. SPIE, 839, 122–129 (1987).
  2. K. Moriya, “Multichannel optical slip ring,” Japanese patent 62–28704 (31 July 1985).
  3. J. W. Corcoran, “A multiple parallel channel rotary optical coupler,” European patent 419 029 (10 August 1990).
  4. G. Spinner, M. Lang, and A. Pautz, “Light-rotation coupling for a plurality of channels,” U.S. patent 4,519,670 (28 May 1985).
  5. M. T. Gale, “Replication,” in Micro-Optics: Elements, Systems and Applications, H. P. Herzig, ed. (Taylor & Francis, London, 1997).
  6. M. Larsson, M. Ekberg, F. Nikolajeff, and S. Hård, “Successive development optimization of resist kinoforms manufactured with direct-writing, electron-beam lithography,” Appl. Opt. 33, 1176–1179 (1994).

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