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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 12 — Apr. 20, 1998
  • pp: 2424–2428

Fabrication of high performance laminated polarization splitters consisting of thick a-Si:H/SiO x :H multilayers

Takashi Sato, Norimitsu Sugiyama, Jun Ohno, and Shojiro Kawakami  »View Author Affiliations


Applied Optics, Vol. 37, Issue 12, pp. 2424-2428 (1998)
http://dx.doi.org/10.1364/AO.37.002424


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Abstract

We report fabrication techniques of a-Si:H/SiO x :H multilayers having ample thickness and flat layer boundaries for high performance laminated polarization splitters (LPS’s). In the new fabrication process we used the following techniques to achieve low stress and high surface flatness: SiO x :H film deposition by rf sputtering with a mixture of Ar/H2, two-step deposition using rf bias sputtering, and elimination of surface roughness and defects by mechanical polishing. This process enabled deposition of a multilayer as thick as 265 μm while preserving layer boundaries as flat as 1 nm (rms). As a result, LPS’s having low loss, a large aperture, and a long splitting distance were successfully obtained. The high optical performance is applicable to functional devices integrated into fibers or planar waveguides.

© 1998 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication

History
Original Manuscript: May 6, 1997
Revised Manuscript: November 17, 1997
Published: April 20, 1998

Citation
Takashi Sato, Norimitsu Sugiyama, Jun Ohno, and Shojiro Kawakami, "Fabrication of high performance laminated polarization splitters consisting of thick a-Si:H/SiOx:H multilayers," Appl. Opt. 37, 2424-2428 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-12-2424

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