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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 34 — Dec. 1, 1990
  • pp: 5090–5095

MgO/Ti bilaterally diffused LiNbO3 optical switch

Nobuyuki Tanaka, Tatsuya Banno, Koichi Takahashi, Takao Shiota, and Koichi Inada  »View Author Affiliations


Applied Optics, Vol. 29, Issue 34, pp. 5090-5095 (1990)
http://dx.doi.org/10.1364/AO.29.005090


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Abstract

A MgO/Ti bilaterally diffused optical waveguide is proposed. It features controlling the waveguide spot size and strengthening the optical confinement. It is experimentally shown that the coupling loss with single-mode fiber is reduced to 0.6 dB/facet. The bending loss is also suppressed from 2.2 dB of the Ti diffused waveguide to 0.2 dB at a 30-mm bending radius. The performance of the switch using this method is demonstrated. Total insertion loss is 2.6 dB. Driving voltage is 5.6 V with no degradation of the EO effect.

© 1990 Optical Society of America

History
Original Manuscript: November 13, 1989
Published: December 1, 1990

Citation
Nobuyuki Tanaka, Tatsuya Banno, Koichi Takahashi, Takao Shiota, and Koichi Inada, "MgO/Ti bilaterally diffused LiNbO3 optical switch," Appl. Opt. 29, 5090-5095 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-34-5090


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References

  1. I. Kaminow, “Metal Diffused Optical Waveguide,” Appl. Phys. Lett. 25, 458–460 (1974). [CrossRef]
  2. R. Chen, C. S. Tsai, “Thermally Annealed Single-Mode Proton-Exchanged Channel-Waveguide Cutoff Modulator,” Opt. Lett. 11, 546–548 (1986). [CrossRef] [PubMed]
  3. S. K. Korotky, E. A. J. Marcatili, J. J. Veselka, R. H. Bosworth, “Greatly Reduced Losses for Small-Radius Bends in Ti:LiNbO3 Waveguides,” Appl. Phys. Lett. 48, 92–94 (1986). [CrossRef]
  4. K. Komatsu, S. Yamazaki, M. Kondo, Y. Ohta, “Low-Loss Broad-Band LiNbO3 Guided-Wave Phase Modulators Using Titanium/Magnesium Double Diffusion Method,” IEEE/OSA J. Lightwave Technol. LT-5, 1239–1245 (1987). [CrossRef]
  5. R. Keil, F. Aurachher, “Coupling of Single Mode Ti-Diffused LiNbO3 Waveguides to Single-Mode Fibers,” Opt. Commun. 30, 23–28 (1978). [CrossRef]
  6. J. Noda, M. Fukuma, Y. Ito, “Phase Matching Temperature Variation of Second-Harmonic Generation in Li Out-Diffused LiNbO3 Layers,” J. Appl. Phys. 51, 1379 (1980). [CrossRef]
  7. J. Noda, M. Fukura, S. Saito, “Effect of Mg Diffusion on Ti-Diffused LiNbO3 Waveguides,” J. Appl. Phys. 49, 3150 (1978). [CrossRef]

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