Analysis and optimum design of a polymer Y-fed coupler electro-optic switch using double-section reversed electrodes

Zheng, Chuantao; Ma, Chunsheng; Yan, Xin; Wang, Xian-Yin; Zhang, Daming

doi:10.1080/09500340903165658

Journal of Modern Optics

2009

DOI: 10.1080/09500340903165658

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Analysis and optimum design of a polymer Y-fed coupler electro-optic switch using double-section reversed electrodes

Chuantao Zheng

Chunsheng Ma

Xin Yan

et al.

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Cited by 5 publications

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References 15 publications

(30 reference statements)

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“…In our previous reports, based on rib/rectangular waveguides and the poled polymer AJ309 [1,2] , different non-resonant electro-optic (EO) switches have been numerically proposed, and they usually exhibit a switching voltage of 2-5 V and an EO region length of 3-6 mm, which indicates a voltage-length product of 5-30 V·mm [3][4][5] . For a lower EO coefficient, a long active region is required to drop the switching voltage below 1 V, but this will lead to long waveguide length, which is not allowed in low-voltage, ultra-compact and chip-level interconnection.…”

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A Mach-Zehnder interferometer electro-optic switch with ultralow voltage-length product using poled-polymer/silicon slot waveguide

Huang

Dang

et al. 2015

Optoelectron. Lett.

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By using poled-polymer/silicon slot waveguides in the active region and the Pockels effect of the poled-polymer, we propose a kind of Mach-Zehnder interferometer (MZI) electro-optic (EO) switch operated at 1 550 nm. Structural parameters are optimized for realizing normal switching function. Dependencies of switching characteristics on the slot waveguide parameters are investigated. For the silicon strip with dimension of 170 nm×300 nm, as the slot width varies from 50 nm to 100 nm, the switching voltage can be as low as 1.0 V with active region length of only 0.17-0.35 mm, and the length of the whole device is only about 770-950 µm. The voltage-length product of this switching structure is only 0.17-0.35 V·mm, and it is at least 19-40 times smaller than that of the traditional polymer MZI EO switch, which is 6.69 V·mm. Compared with our previously reported MZI EO switches, this switch exhibits some superior characteristics, including low switching voltage, compact device size and small wavelength dependency.In recent years, optical switching devices have received more and more attention due to their wide applications in optical communication and optical signal processing systems. In our previous reports, based on rib/rectangular waveguides and the poled polymer AJ309 [1,2] , different non-resonant electro-optic (EO) switches have been numerically proposed, and they usually exhibit a switching voltage of 2-5 V and an EO region length of 3-6 mm, which indicates a voltage-length product of 5-30 V·mm [3][4][5] . For a lower EO coefficient, a long active region is required to drop the switching voltage below 1 V, but this will lead to long waveguide length, which is not allowed in low-voltage, ultra-compact and chip-level interconnection. Besides polymer EO switches, silicon EO switches also have shown great potential for being compatible with standard complementary metal-oxide-semiconductor (CMOS) processing technology. So far, silicon EO switches have been widely demonstrated based on free carrier depletion [6][7][8] or injection [9,10] in diode structures or CMOS structures [11] . To meet the needs of optical communication, an optical switch should possess some important characteristics, involving small device dimension, suitable electrical and optical bandwidth, large voltagelength product, high extinction ratio and low power consumption.Compared with other waveguide structures, such as rib waveguide and rectangular waveguide, the slot waveguide has been proven to be a good candidate to design and fabricate integrated optical devices. In this paper, we propose a kind of Mach-Zehnder interferometer (MZI) EO switch operated at 1 550 nm by using poled-polymer/ silicon slot waveguides in the active region and silicon waveguides in the passive region, and the Pockels effect is exploited via the poled-polymer cladding in the slot waveguide. Through optimization, the device can perform normal switching functions. An impressive advantage of this structure is that its voltage-length product is reduced by at least 19-40 ti...

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confidence: 99%

A Mach-Zehnder interferometer electro-optic switch with ultralow voltage-length product using poled-polymer/silicon slot waveguide

Huang

Dang

et al. 2015

Optoelectron. Lett.

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Investigation on push-pull polymer Mach-Zehnder interferometer electro-optic switches using improved 3-D mode propagation analysis method

Zheng

Cui

et al. 2011

Opt Quant Electron

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By introducing normalized mode excitation coefficient and total mode excitation coefficient, we improve the 3-D mode propagation analysis (MPA) method for convenient design and analysis of multimode interference (MMI) coupler. With the improved 3-D MPA method and point-matching method, we present a novel formulation technique to analyze the low-and high-frequency characteristics for the impedance-matched polymer Mach-Zehnder interferometer electro-optic (EO) switch based on MMI couplers. As an application, under 1550 nm, optimization and simulation performed for the designed device reveal low driving voltage of 1.375 V with short EO region length of 5 mm. The insertion loss and extinction ratio are less than 3.75 dB and more than 42 dB, respectively. The microwave characteristic impedance is about 49.6 , and due to the less mismatch between lightwave velocity and microwave velocity, the estimated cutoff switching frequency is up to 263 GHz with the 10-90% rise time and fall time about 1.90 ps under the operation of step-style square-wave switching signal. This theoretical cutoff switching frequency is almost 1.53 times of that of our previous reported shielded EO switch with similar design technique.

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Investigation on an ultra-compact Mach–Zehnder interferometer electro-optic switch using poled-polymer/silicon slot waveguide

et al. 2015

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Analysis and optimum design of a polymer Y-fed coupler electro-optic switch using double-section reversed electrodes

Cited by 5 publications

References 15 publications

A Mach-Zehnder interferometer electro-optic switch with ultralow voltage-length product using poled-polymer/silicon slot waveguide

A Mach-Zehnder interferometer electro-optic switch with ultralow voltage-length product using poled-polymer/silicon slot waveguide

Investigation on push-pull polymer Mach-Zehnder interferometer electro-optic switches using improved 3-D mode propagation analysis method

Investigation on an ultra-compact Mach–Zehnder interferometer electro-optic switch using poled-polymer/silicon slot waveguide

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