Mode-insensitive 3-dB power splitter based on multimode-interference coupler

Sun, Shijie; Che, Yuanhua; Zhu, Mengya; Lian, Tianhang; Sun, Xueqing; Wang, Xibin; Huang, Quandong; Zhang, Daming

doi:10.1016/j.optlastec.2022.109017

Cited by 7 publications

(11 citation statements)

References 32 publications

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“…Additionally, unlike the impact of δ o f f set on port #3, the variation of δ 1 has a more significant effect on the CTs of modes at port #2. Considering the simulation step size, these simulation results are consistent with the GH shift behavior predicted by Equation ( 11) and the transmission shift behavior predicted by Equation (12). Furthermore, from Figure 4a-d, it can be observed that when δ o f f set and δ 1 deviations relative to the target values are within 20 nm, and the changes in EL and CTs are less than 0.02 dB and 0.5 dB, respectively, indicating good manufacturing robustness of the device.…”

Section: Simulation and Analysissupporting

confidence: 81%

“…Additionally, the rapid advancement of MDM technology enables power splitters supporting multiple modes to enhance the transmission and processing speed of high-capacity information greatly. Presently, common multimode power splitters include devices such as multimode interference couplers (MMI) [11,12] and directional couplers (DC) [9,13]. These couplers have limited-wavelength bandwidth support and require complex designs to achieve arbitrary power splitting ratios (PSRs), which significantly restricts their utility in on-chip MDM applications.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Broadband, Compact Arbitrary-Ratio Multimode Power Splitter Based on Tilted Subwavelength Gratings

Chen,

Guo,

Yang

et al. 2023

Photonics

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Mode division multiplexing (MDM) technology is an effective solution for high-capacity optical interconnection, and multimode power splitters, as essential components in MDM systems, have attracted widespread attention. However, supporting a wide range of modes and arbitrary power splitting ratios with large bandwidth in power splitters remains a significant challenge. In this paper, we designed a power splitter based on a subwavelength grating (SWG) structure with tilted placement on a silicon-on-insulator (SOI) substrate. We achieve arbitrary TE0–TE9 mode-insensitive power distribution by altering the filling coefficient of the SWG. Thanks to our specific selection of cladding materials and compensatory design for the optical wave transmission and reflection shifts induced by SWG, our device demonstrates low additional loss (EL < 1.1 dB) and inter-mode crosstalk (−18.8 < CT < −60 dB) for optical modes ranging from TE0 to TE9, covering a wavelength range from 1200 nm to 1700 nm. Furthermore, our proposed device can be easily extended to higher-order modes with little loss of device performance, offering significant potential in MDM platforms.

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Section: Simulation and Analysissupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Ultra-Broadband, Compact Arbitrary-Ratio Multimode Power Splitter Based on Tilted Subwavelength Gratings

Chen,

Guo,

Yang

et al. 2023

Photonics

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“…With the requirement of a range of optical devices in high speed optical communication and instrumentation, more emphasis is given in the design and development of compact planer waveguide device in comparison to bulk and heavy optical devices requiring careful alignment, protection against moisture, ambient temperature fluctuation and vibration. In this direction, Multimode interference couplers is preferred as one of the basic components for power splitting and combining [4,5,14,33,53,62,65,78,98] switching [16,18,24,26,32,38,39,42,50,63,97,98,100,101] coarse wavelength division multiplexing/de-multiplexing [7,19,45,48,52,75] array waveguide grating [56,79] wavelength combiner [60], polarization splitter [61] and tunable waveguide Laser device [21,27,28,31] due to its high fabrication tolerance, compact size and low polarization independent loss.…”

Section: Introductionmentioning

confidence: 99%

“…Since the introduction of MMI couplers, extensive studies have been carried out using silicon based materials [7-11, 29-46, 56-66] III-V semiconductors [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28], polymers [47][48][49][50]67] and lithium niobate (LiNbO 3 ) [51], for its realization in integrated optics circuits. The materials used in integrated optics are of either low index contrast (e.g.…”

Section: Introductionmentioning

confidence: 99%

Multimode interference coupler based on general interference for integrated optical and quantum optic devices: a review

Sahu

2024

Phys. Scr.

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Integrated optics play important role in the development for optical network devices, optical processing, instrumentation and quantum information device. Here, multimode interference (MMI) coupler is one of basic component preferred for these integrated optic devices in which MMI coupler based on general interference (GIMMI) has been focused for large scale integrated optic devices because of compact size in comparison to MMI coupler based restricted interference (RIMMI). In this paper, we have reviewed different GIMMI structures reported previously. Different waveguide materials are mentioned and compared for fabrication of GIMMI device. The coupling behaviors and modal analysis of GIMMI couplers and their different tapered structures are estimated by using simple model based on sinusoidal modes showing reduced coupling lengths in down tapered structures in comparison to other structures. The excess loss, polarization dependence loss and crosstalk versus fabrication tolerances are obtained to compare their performances revealing almost same losses and fabrication tolerance. The paper reports the use of the GIMMI coupler in wavelength multiplexing, power splitting, switching, optical processing. Finally, Quantum optic application of GIMMI coupler is shown indicating high quantum fidelity of 50:50 coupling ratio.

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“…Various multiplexing methods have been proposed for this purpose, such as wavelength division multiplexing (WDM), space division multiplexing (SDM) and polarization division multiplexing (PDM) technologies [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Mode division multiplexing (MDM) has been considered as a promising technology [ 9 , 10 ] that can significantly improve the capacity of optical communication, on-chip interconnect, and computation [ 11 , 12 ]. Since the orthogonal eigenmodes of the same wavelength propagate in a single channel without inter-channel crosstalk, cooperation with WDM technology, MDM technology increases overall transmission capacity dramatically [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

On-Chip E00–E20 Mode Converter Based on Multi-Mode Interferometer

et al. 2023

Self Cite

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Mode converters is a key component in mode-division multiplexing (MDM) systems, which plays a key role in signal processing and multi-mode conversion. In this paper, we propose an MMI-based mode converter on 2%-Δ silica PLC platform. The converter transfers E00 mode to E20 mode with high fabrication tolerance and large bandwidth. The experimental results show that the conversion efficiency can exceed −1.741 dB with the wavelength range of 1500 nm to 1600 nm. The measured conversion efficiency of the mode converter can reach −0.614 dB at 1550 nm. Moreover, the degradation of conversion efficiency is less than 0.713 dB under the deviation of multimode waveguide length and phase shifter width at 1550 nm. The proposed broadband mode converter with high fabrication tolerance is promising for on-chip optical network and commercial applications.

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Mode-insensitive 3-dB power splitter based on multimode-interference coupler

Cited by 7 publications

References 32 publications

Ultra-Broadband, Compact Arbitrary-Ratio Multimode Power Splitter Based on Tilted Subwavelength Gratings

Ultra-Broadband, Compact Arbitrary-Ratio Multimode Power Splitter Based on Tilted Subwavelength Gratings

Multimode interference coupler based on general interference for integrated optical and quantum optic devices: a review

On-Chip E00–E20 Mode Converter Based on Multi-Mode Interferometer

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