An Optical Switch Based on Electro-Optic Mode Deflection in Lithium Niobate Waveguide

Zhang, Xinyue; Chen, Huajiang; Liu, Liling; Shang, Jumei; Yu, Lingyun; Li, Ké; Dong, Jiangli; Qiu, Wentao; Guan, Heyuan; Lu, Huihui; Chen, Zhe

doi:10.1109/lpt.2020.3019962

Cited by 24 publications

(6 citation statements)

References 17 publications

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“…Such a high bandwidth enables 400-QAM and thus realized a record 1.96 Tb∕s total data capacity. By engineering the electrode transmission line 282,295 or introducing more multiplexing dimensions, such as mode division multiplexing, 24 the transmission speed/volume can be further improved.…”

Section: Eo Devices 421 Electro-optic Modulatormentioning

confidence: 99%

Advances in lithium niobate photonics: development status and perspectives

Chen

et al. 2022

Adv. Photon.

138

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Section: Eo Devices 421 Electro-optic Modulatormentioning

confidence: 99%

Advances in lithium niobate photonics: development status and perspectives

Chen

et al. 2022

Adv. Photon.

138

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“…For decades, lithium niobate (LN) has been attracted extensive attention due to its excellent properties, including large electro-optic coefficient, low optical loss, wide transparency window, good temperature stability and so on [19]. However, conventional LN EO switches have large device size due to the small index contrast of the used waveguides formed with the annealed-proton-exchanged (APE) or the Ti indiffusion processes, which do not meet the demand of miniaturization [20,21]. Fortunately, this defect has now been addressed by the new emerging thin-film lithium niobite, i.e.…”

Section: Introductionmentioning

confidence: 99%

Broadband and Low-Random-Phase-Errors 2 × 2 Optical Switch on Thin-Film Lithium Niobate

et al. 2022

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We propose and demonstrate a broadband and lowrandom-phase-errors 22 optical switch on thin-film lithium niobate platform. The proposed switch is based on a typical Mach-Zehnder interferometer constructed with two 22 3-dB multimode interferometer couplers, two few-mode waveguide (FMW) arms, and corresponding input and output waveguides. The use of FMWs can help to reduce the random phase errors and improve the fabrication tolerances. Over a wide optical bandwidth from 1530 nm to 1605 nm, our typical fabricated switch can work on the desired initial operating state and achieve an extinction ratio mostly larger than ~16 dB. The switching voltage is ~7.3 V. The rise and fall times are 134.4 ns and 8.8 ns, respectively. This work can facilitate the development of optical switches on the lithiumniobate-insulator (LNOI) platform.

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“…The implementations of those devices allow to spatially manipulate various spatial modes in an FMF. A mode selective switch can dynamically (de)multiplex the spatial modes between waveguides [ 18 , 19 , 20 , 21 ]. Such an optical switch can be realized via thermo-optic effect based on the high thermo-optic coefficient polymer material platform or via electric-optic effect based on lithium niobate waveguides [ 16 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…A mode selective switch can dynamically (de)multiplex the spatial modes between waveguides [ 18 , 19 , 20 , 21 ]. Such an optical switch can be realized via thermo-optic effect based on the high thermo-optic coefficient polymer material platform or via electric-optic effect based on lithium niobate waveguides [ 16 , 18 ]. By the use of a silicon densely packed waveguide array, an optical switch is reported to manipulate multiple spatial modes [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Low Power Consuming Mode Switch Based on Hybrid-Core Vertical Directional Couplers with Graphene Electrode-Embedded Polymer Waveguides

et al. 2022

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We propose a mode switch based on hybrid-core vertical directional couplers with an embedded graphene electrode to realize the switching function with low power consumption. We designed the device with Norland Optical Adhesive (NOA) material as the guide wave cores and epoxy polymer material as cladding to achieve a thermo-optic switching for the E11, E21 and E12 modes, where monolayer graphene served as electrode heaters. The device, with a length of 21 mm, had extinction ratios (ERs) of 20.5 dB, 10.4 dB and 15.7 dB for the E21, E12 and E11 modes, respectively, over the C-band. The power consumptions of three electric heaters were reduced to only 3.19 mW, 3.09 mW and 2.97 mW, respectively, and the response times were less than 495 µs, 486 µs and 498 µs. Additionally, we applied such a device into a mode division multiplexing (MDM) transmission system to achieve an application of gain equalization of few-mode amplification among guided modes. The differential modal gain (DMG) could be optimized from 5.39 dB to 0.92 dB over the C-band, together with the characteristic of polarization insensitivity. The proposed mode switch can be further developed to switch or manipulate the attenuation of the arbitrary guided mode arising in the few-mode waveguide.

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An Optical Switch Based on Electro-Optic Mode Deflection in Lithium Niobate Waveguide

Cited by 24 publications

References 17 publications

Advances in lithium niobate photonics: development status and perspectives

Advances in lithium niobate photonics: development status and perspectives

Broadband and Low-Random-Phase-Errors 2 × 2 Optical Switch on Thin-Film Lithium Niobate

Low Power Consuming Mode Switch Based on Hybrid-Core Vertical Directional Couplers with Graphene Electrode-Embedded Polymer Waveguides

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