Abstract

Novel designs of polarization devices based on Bragg reflector waveguides in a high index contrast silicon-on-insulator (SOI) platform have been proposed. Brewster angle condition is incorporated in the periodic structures. Numerical simulations with a 3D semivectorial beam propagation method demonstrate the device performance as TE mode polarizer with high TE to TM extinction ratio and TE/TM mode polarization splitter and combiner with high polarization splitting efficiency.

© 2003 Optical Society of America

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References

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Appl. Phys. Lett.

M. A. Duguay, Y. Kokubun and T. L. Koch, �??Antiresonant reflecting optical waveguides in SiO2-Si multilayer structure,�?? Appl. Phys. Lett. 49, 13-15 (1986).
[CrossRef]

Electron. Lett.

J. Gehler, A. Brauer and W. Karthe, U. Trutschel and M. A. Duguay, �??ARROW-based optical wavelength filter in silica,�?? Electron. Lett. 31, 547-549 (1995).
[CrossRef]

F. Brechet, P. Roy, J. Marcon and D. Pagnoux, �??Singlemode propagation into depressed-core-index photonic bandgap fibre designed for zero-dispersion propagation at short wavelengths,�?? Electron. Lett. 36, 514-515 (2000).
[CrossRef]

Opt. Comm.

E. Simova, I. Golub and A. Delage, �??Analysis of polarization properties of lateral antiresonant reflecting optical waveguides,�?? Opt. Comm., in press.

Opt. Commun.

P. Yeh and A. Yariv, �??Bragg reflection waveguides,�?? Opt. Commun. 68, 1196-1201 (1978).

Opt. Express

Opt. Lett.

OSA Topical Meeting, Monterey, CA (2003)

E. Simova and I. Golub, �??Polarization devices based on Bragg reflector waveguides,�?? in Bragg Gratings, Photosensitivity and Poling in Glass Waveguides, OSA Topical Meeting, Monterey, CA, USA, Sept. 1-3 (2003), paper MD19.

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Figures (7)

Fig. 1.
Fig. 1.

Design structure of the Bragg reflector waveguide for TE polarizer. Si nhigh =3.476, Si 3 N 4 nlow =1.99, Si O 2 n Si O 2 = 1.5 , dhigh =0.37 µm, dlow =1.14 µm, dcore =6.1 µm, ncore =nlow =1.99 (non-depressed core) or ncore =1.8 (depressed core), height of Si substrate hSi =1µm, SiO2 height h Si O 2 = 1 μm , height of Bragg reflectors region hcore =2.2 µm and hair =1.4 µm air.

Fig. 2.
Fig. 2.

Power in TE (triangles) and TM (dots) modes versus propagation distance in the Bragg reflector waveguide with depressed index core for two and five periods.

Fig. 3.
Fig. 3.

Power in TE (triangles) and TM (dots) modes versus propagation distance in the Bragg reflector waveguide with non-depressed index core for two and five periods.

Fig. 4.
Fig. 4.

Asymmetric structure of coupled Bragg reflector waveguides for polarization splitting/combining. Parameters are the same as given in Fig. 1.

Fig. 5.
Fig. 5.

TE mode distribution versus propagation distance in the waveguides in Fig 4. Light is launched in the upper core.

Fig. 6.
Fig. 6.

TM mode distribution versus propagation distance in the waveguides in Fig 4. Light is launched in the upper core.

Fig. 7.
Fig. 7.

Power in TE (triangles) and TM (dots) modes from Figs. 5 and 6 versus propagation distance in the coupled waveguides.

Equations (3)

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d high = ( 2 k + 1 ) λ 4 ( n high 2 + n low 2 ) 1 2 n high 2 ; d low = ( 2 l + 1 ) λ 4 ( n high 2 + n low 2 ) 1 2 n low 2 , k , l = 0 , 1 , 2 , ,
d core = m λ 2 1 ( n core 2 n eff 2 ) 1 2 , m = 1 , 2 , , .
n eff = n high n low ( n high 2 + n low 2 ) 1 2 and n eff n core n low .

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