Abstract

We demonstrate a novel hollow waveguide optical switch composed of an multi-mode interference (MMI) coupler with a variable air core. The numerical simulation and experiment of the proposed optical switch is carried out for investigating the operation of the switch. Switching operation can be obtained by the mechanical displacement of the air core of an MMI hollow waveguide. A hollow waveguide consists of Au mirrors deposited on two GaAs substrates for optical confinement. The measured result shows a possibility of switching of about 85% optical power fraction with a switch length of 1.1 mm and small displacement (ΔDcore=3 µm) of an air core thickness. The measured insertion losses of a 1.1 mm long hollow waveguide with 12 and 9 µm air core are 5.4 dB and 5.7 dB respectively.

© 2005 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  13. C. H. Bae and F. Koyama, �??Modeling of hollow waveguide optical switch with variable air core,�?? IEICE ELEX, 1, 551-555 (2004).
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    [CrossRef]

Appl. Phys. Lett.

S. Nojima, �??Enhancement of excitonic electro-refraction by optimizing quantum well materials and structures,�?? Appl. Phys. Lett. 55, 1868- 1870 (1989).
[CrossRef]

T. Pertsch, T. Zentgraf, U. Peschel, A. Brauer, F. Lederer, �??Beam steering in waveguide arrays,�?? Appl. Phys. Lett. 80, 3247-3249 (2002).
[CrossRef]

Jianyi Yang, Qingjun Zhou, and Ray T. Chen, �??Polymide-waveguide-based thermal optical switch using total-internal-reflection effect,�?? Appl. Phys. Lett. 81, 2947-2949 (2002).
[CrossRef]

T. Nikolajsen, K. Leosson, and S. I. Bozhevolnyi, �??Surface plasmon polariton based modulators and switches operating at telecom wavelengths,�?? Appl. Phys. Lett. 85, 5833- 5835 (2004).
[CrossRef]

ECOC 2003

R. N. Jenkins, M. E. McNie, A. F. Blockly, N. Price, and J. McQuillan, �??Hollow waveguides for integrated optics,�?? Proc. 29th ECOC, Rimini, Italy, Tu1.2.4, 162-163 (2003).

Electron. Lett.

B. Liu, A. Shakier, P. Abraham and J. E. Bowers, �??Fused vertical coupler switches,�?? Electron. Lett. 34, 2160-2161 (1998).
[CrossRef]

S. Toyoda, N. Ooba, Y. Katoh, T. Kurihara and T. Maruno, �??Low crosstalk and low loss 2x2 thermo-optic digital optical switch using silicone resin waveguides,�?? Electron. Lett. 36, 1803-1804 (2000).
[CrossRef]

IEEE J. Quantum Electron

E. V. Tomme, Peter P. Van Daele, Roel G. Baets and Paul E. Lagasse, �??Integrated optic devices based on nonlinear optical polymers,�?? IEEE J. Quantum Electron 27, 778-787 (1991).
[CrossRef]

IEEE Photon. Technol. Lett.

U. Fischer, B. Schuppert, and K, Petermann �??Optical waveguide switches in silicon based on Ge-indiffused waveguides,�?? IEEE Photon. Technol. Lett. 6, 978-980 (1994).
[CrossRef]

A. Yehia, K. Madkour, H. Maaty, and D. Khalil, �??Multiple-imaging in 2-D MMI silicon hollow waveguides,�?? IEEE Photon. Technol. Lett. 16, 2072-2074 (2004).
[CrossRef]

IEICE ELEX

C. H. Bae and F. Koyama, �??Modeling of hollow waveguide optical switch with variable air core,�?? IEICE ELEX, 1, 551-555 (2004).
[CrossRef]

J. Lightwave Technol.

L. B. Soldano and E. C. M. Pennings, �??Optical multi-mode interference devices based on self-imaging: Principles and applications,�?? J. Lightwave Technol. 10, 615-627 (1995).
[CrossRef]

Jpn. J. Appl. Phys.

T. Miura, F. Koyama, Y. Aoki, A. Matsutani and K. Iga, �??Hollow optical waveguide for temperature-insensitive photonic integrated circuits,�?? Jpn. J. Appl. Phys. 40, L688-L690 (2001).
[CrossRef]

T. Miura, F. Koyama, and A. Matsutani, �??Modeling and fabrication of hollow optical waveguide for photonic integrated circuits,�?? Jpn. J. Appl. Phys. 41, 4785-4789 (2002).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Schematic structure of proposed hollow waveguide optical switch composed of a MMI coupler with a variable air core.

Fig. 2.
Fig. 2.

Schematic cross-sectional view of the hollow waveguide MMI coupler optical switch.

Fig. 3.
Fig. 3.

Calculated field distribution of an MMI coupler. Top view and cross-sectional view for (a-1) 12 µm and for (a-2) 10 µm, respectively. Calculated optical intensity distribution at a distance of 1.2mm.

Fig. 4.
Fig. 4.

Measured field distribution of MMI coupler (a) Dcore=12 µm, (b) Dcore=9 µm

Fig. 5.
Fig. 5.

Measured optical intensity distribution at a distance of 1.1 mm for 9 µm and 12 µm air core.

Equations (1)

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L π = π β 0 β 1 4 n r W e 2 3 λ 0 ,

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