Ultra-Broadband Polarization Beam Splitter Based on Cascaded Mach-Zehnder Interferometers Assisted by Effectively Anisotropic Structures

Lin, Zongxing; Chen, Kaixuan; Huang, Qiangsheng; He, Sailing

doi:10.1109/jphot.2021.3050114

Cited by 22 publications

(4 citation statements)

References 28 publications

(20 reference statements)

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“…In the context where the TE input mode is launched and directed through the upper port of the MZI switch, it exits as the TE mode at the output of the PR and PBS, preserving its initial characteristics; whereas, in the event of applying a π phase shift to the MZI switch, the TE input mode undergoes redirection through the lower port of the MZI switch, subsequently undergoing a mode conversion to the TM mode facilitated [14].…”

Section: • 𝜙 Fixes Contributions Of Fabrication Errorsmentioning

confidence: 99%

Design and analysis of SiN optical waveguide for 2D beam steering

Zhou,

Shimeno,

Kawai

et al. 2023

Laser Beam Shaping XXIII

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This paper presents a method for achieving 2D beam steering using 16-phased array grating couplers through FDTD simulation. The method begins by designing a single grating coupler with a silicon nitride material (depth = 0.15 um, width = 0.2 um, grating pitch = 0.34 um) to achieve 1D beam steering of around 7.6° by changing the input wavelength from 500 nm to 550 nm and changing the TE or TM mode source. The grating pitch of 0.34 um was selected because the input wavelength at 532 nm through the NV center can measure the magnitude field, resulting in a reflected angle of 0°. By changing the input wavelength, positive and negative beam steering directions can be achieved. Subsequently, a total of 16 phased arrays were established, and a multimode interferometer (MMI) was used to split the input beam into 16 grating couplers. With the 16 waveguides, the phase can be changed from 0 to π/8, allowing the 2D steering angle to be altered from 0° to 1.72°. The method was validated using 3D simulations to ensure that the results match those obtained through 2D simulation.

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Section: • 𝜙 Fixes Contributions Of Fabrication Errorsmentioning

confidence: 99%

Design and analysis of SiN optical waveguide for 2D beam steering

Zhou,

Shimeno,

Kawai

et al. 2023

Laser Beam Shaping XXIII

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show abstract

“…Multimode interference can realize high extinction ratio but with a large footprint and a high insertion loss [17][18][19]. Mach-Zehnder interference structure is somewhat complex and the working bandwidth is usually limited [20][21][22]. Grating waveguide-based device can achieve a high extinction ratio and wide working bandwidth but the insertion loss is usually high [23][24][25], though some tilted nanograting structure has a compact size [26].…”

Section: Introductionmentioning

confidence: 99%

Nano-wire bridge waveguide-assisted silicon polarizing beam splitter

Liu,

Feng,

Chen

et al. 2023

Holography, Diffractive Optics, and Applications XIII

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“…To overcome the birefringence issue on silicon, the polarization diversity circuit is often used where a polarization beam splitter (PBS) is one of the key devices to divide and combine optical waves with orthogonal polarizations. The on-chip silicon PBS has been widely studied and demonstrated at C-band using various techniques including multi-mode interference (MMI) couplers [15][16][17], Mach-Zehnder interferometers (MZIs) [18], 2D grating couplers [19][20][21], asymmetrical directional couplers (ADCs) [22][23][24], inversely designed meta-structure [25] and so forth. The MMI and MZI structures allow for high polarization extinction ratios (PER), which is normally >20 dB, but they normally occupy too much chip area.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Broadband Polarization Beam Splitter Based on the Digital Meta-Structure at the 2 µm Waveband

Liu

Guo

et al. 2022

Photonics

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The 2 μm waveband is considered to have great potential in optical communications. Driven by the demands on high-performance functional devices in this spectral band, various integrated photonic components have been demonstrated. In this work, an analog and digital topology optimization method is proposed to design an ultra-broadband polarization beam splitter at the 2 μm waveband. Within an optical bandwidth of 213 nm, the excess losses of TE and TM modes are <0.53 dB and 0.3 dB, respectively. The corresponding polarization extinction ratios are >16.5 dB and 18.1 dB. The device has a very compact footprint of only 2.52 µm × 5.4 µm. According to our best knowledge, this is a benchmark demonstration of an ultra-broadband and ultra-compact polarization beam splitter enabled by the proposed optimization method.

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Ultra-Broadband Polarization Beam Splitter Based on Cascaded Mach-Zehnder Interferometers Assisted by Effectively Anisotropic Structures

Cited by 22 publications

References 28 publications

Design and analysis of SiN optical waveguide for 2D beam steering

Design and analysis of SiN optical waveguide for 2D beam steering

Nano-wire bridge waveguide-assisted silicon polarizing beam splitter

An Ultra-Broadband Polarization Beam Splitter Based on the Digital Meta-Structure at the 2 µm Waveband

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