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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 34 — Dec. 1, 1990
  • pp: 5096–5102

Practical method of waveguide-to-fiber connection: direct preparation of waveguide endface by cutting machine and reinforcement using ruby beads

N. Mekada, M. Seino, Y. Kubota, and H. Nakajima  »View Author Affiliations


Applied Optics, Vol. 29, Issue 34, pp. 5096-5102 (1990)
http://dx.doi.org/10.1364/AO.29.005096


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Abstract

We propose and demonstrate new practical methods of waveguide end fabrication and fiber attachment for Ti:LiNbO3 waveguides. We fabricated waveguide endfaces with a cutting machine, which simplifies the manufacture of waveguide devices and provides a low excess loss of 0.3 dB or less. Our proposed fiber attachment method features fibers that protrude slightly from the reinforcement. It provides easy alignment, low excess loss (<0.1 dB), high strength (>600 gf), and high thermal stability (−10 to 60°C). We also developed an easy way to reduce the backreflection from the joint without using anti-reflection coating. Instead, a tapered hemispherical end fiber and an angled waveguide endface are used. Backreflection is easily reduced to less than −30 dB.

© 1990 Optical Society of America

History
Original Manuscript: November 17, 1989
Published: December 1, 1990

Citation
N. Mekada, M. Seino, Y. Kubota, and H. Nakajima, "Practical method of waveguide-to-fiber connection: direct preparation of waveguide endface by cutting machine and reinforcement using ruby beads," Appl. Opt. 29, 5096-5102 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-34-5096


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References

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  21. Y. Kubota, N. Mekada, M. Seino, H. Nakajima, “Attachment of Tapered Hemispherical-End Fiber to a Ti:LiNbO3 Mach-Zehnder Modulator with Low Insertion Loss and Small Back-Reflection,” in Technical Digest, Second Microoptics Conference-Eighth Topical Meeting on Gradient-Index Optical Imaging Systems, Tokyo (1989), paper J4.
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