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Optics Letters

Optics Letters


  • Vol. 20, Iss. 6 — Mar. 15, 1995
  • pp: 581–583

Spot size transformer with a periodically segmented waveguide based on InP

F. Dorgeuille, B. Mersali, S. François, G. Hervé-Gruyer, and M. Filoche  »View Author Affiliations

Optics Letters, Vol. 20, Issue 6, pp. 581-583 (1995)

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We report what is to our knowledge the first optimization of a spot size transformer by use of a periodically segmented waveguide for photonic integrated circuits based on InP. It is shown that a nonlinear variation of the segmentation ratio along the propagation direction allows one to make an adiabatic transition of a short length. A simple method based on the study of a beveled edge transition is presented for the optimization of such a device. Internal losses in the transition region as low as 1.2 dB are obtained between a coupling waveguide and a simple heterostructure waveguide, with a very high transition spot size expansion factor.

© 1995 Optical Society of America

Original Manuscript: September 9, 1994
Published: March 15, 1995

F. Dorgeuille, B. Mersali, S. François, G. Hervé-Gruyer, and M. Filoche, "Spot size transformer with a periodically segmented waveguide based on InP," Opt. Lett. 20, 581-583 (1995)

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