Abstract

Modal conversion between the fundamental mode and the first-order (leaky) mode has been experimentally investigated in high-index-contrast integrated-optical bent waveguides. The matched bend condition has been experimentally confirmed on cascaded bends, and the effect of both matched and unmatched bends on Y branches has been investigated. Good agreement between theoretical predictions and experimental results for both monomode and multimode waveguides is achieved. It is demonstrated that, in bent waveguides, the modal conversion between the fundamental mode and the first (leaky) mode can be accurately controlled to avoid additional losses and transfer function impairments.

© 2004 Optical Society of America

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  1. S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
    [CrossRef]
  2. A. Melloni, F. Carniel, R. Costa, and M. Martinelli, J. Lightwave Technol. 19, 571 (2001).
    [CrossRef]
  3. A. Melloni, P. Monguzzi, R. Costa, and M. Martinelli, J. Opt. Soc. Am. A 20, 130 (2003).
    [CrossRef]
  4. T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
    [CrossRef]
  5. T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
    [CrossRef]
  6. LioniX BV, Enschede, The Netherlands, http://www.lionixbv.nl .

2003

2002

S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
[CrossRef]

2001

1998

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

1995

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

Ankiewiez, A.

S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
[CrossRef]

Carniel, F.

Costa, R.

Hirono, T.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

Kawachi, M.

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

Kitoh, T.

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

Kohtoku, M.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

Love, J. D.

S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
[CrossRef]

Lui, W. W.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

Martinelli, M.

Melloni, A.

Monguzzi, P.

Takato, N.

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

Tomljenovic-Hannic, S.

S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
[CrossRef]

Yasu, M.

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

Yokoyama, K.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

Yoshikuni, Y.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

Electron. Lett.

S. Tomljenovic-Hannic, J. D. Love, and A. Ankiewiez, Electron. Lett. 38, 220 (2002).
[CrossRef]

IEEE Photon. Technol. Lett.

T. Hirono, M. Kohtoku, Y. Yoshikuni, W. W. Lui, and K. Yokoyama, IEEE Photon. Technol. Lett. 10, 982 (1998).
[CrossRef]

J. Lightwave Technol.

A. Melloni, F. Carniel, R. Costa, and M. Martinelli, J. Lightwave Technol. 19, 571 (2001).
[CrossRef]

T. Kitoh, N. Takato, M. Yasu, and M. Kawachi, J. Lightwave Technol. 13, 555 (1995).
[CrossRef]

J. Opt. Soc. Am. A

Other

LioniX BV, Enschede, The Netherlands, http://www.lionixbv.nl .

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Figures (5)

Fig. 1
Fig. 1

(a) Cascade of N identical curved waveguides. (b) Cascade of four bends with R=1000 µm followed by a symmetrical Y branch.

Fig. 2
Fig. 2

Simulated evolution of the fundamental mode intensity along the test structure of Fig. 1, with R=300 µm and for two bending angles. Numbers 1–6 correspond to bent waveguides section.

Fig. 3
Fig. 3

Comparison between measured (filled circles) and simulated (curves) insertion losses in excess of those of a straight waveguide for the structure of Fig. 1. (a) R=300 µm, N=6. (b) R=900 µm, N=18.

Fig. 4
Fig. 4

Comparison between measured (filled circles) and simulated (curve) Y-branch imbalance as a function of bending angle θ. λ=1480 nm.

Fig. 5
Fig. 5

Experimental spectral behavior of the Y-branch imbalance for θ=0°, θ=θB, and θ=θB/2.

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