Design and analysis of transmission enhanced multi-segment grating in MZI configuration for slow light applications

doi:10.1364/OE.19.007872

Design and analysis of transmission enhanced multi-segment grating in MZI configuration for slow light applications

Shengling Deng and Z. Rena Huang »View Author Affiliations

Optics Express, Vol. 19, Issue 8, pp. 7872-7884 (2011)
http://dx.doi.org/10.1364/OE.19.007872

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Abstract

This paper proposes to use slow light effects near the Brillouin zone band edge of one-dimensional gratings for reducing the size of integrated electro-optic (EO) modulators. The gratings are built within the arms of a Mach-Zehnder Interferometer (MZI) for intensity modulation. To overcome the inherent high reflection and low extinction ratio, we introduce various multi-segment grating designs. We use coupled-mode theory and derive transfer matrices to analyze the spectral transmittance and phase delay of each arm of the interferometer. Calculations show that a size-reduction of a factor of 2 or more can be achieved at λ = 1.574µm with an insertion loss of 0.17dB and an amplitude modulation extinction ratio of 18.84dB. The simulated structure is based on a Si slab-waveguide 0.2 μm thick with 30nm deep grating groves on SiO₂ substrate.

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(230.1480) Optical devices : Bragg reflectors

ToC Category:
Integrated Optics

History
Original Manuscript: November 2, 2010
Revised Manuscript: March 11, 2011
Manuscript Accepted: March 29, 2011
Published: April 8, 2011

Citation
Shengling Deng and Z. Rena Huang, "Design and analysis of transmission enhanced multi-segment grating in MZI configuration for slow light applications," Opt. Express 19, 7872-7884 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-8-7872

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References

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