Research of two-dimensional beam steering in LCOS-based wavelength selective switch

Yang, Dongtang; He, Cheng; Jing, Zean; Luo, Fengguang

doi:10.1364/ao.54.004411

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Further, the total optical efficiency of the phase-only LCOS device was improved by a multi-layer dielectric mirror coating to maximize its reflectance from 80% to >96%, which is 12%-18% higher than the standard LCOS device [13]. Also, researchers have reported various approaches to increasing the diffraction efficiency and steering angle of the LCOS device [14], [15], [16], [17]. However, a wider beam steering angle with an easy fabrication process is needed for a solid-state LiDAR system.…”

Section: Introductionmentioning

confidence: 99%

Wide Optical Beam Steering LCOS Device for Solid-State LiDAR Applications

Son,

Meetei,

Park

et al. 2024

IEEE Photon. Technol. Lett.

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We demonstrate one-dimensional beam steering in a liquid crystal on silicon (LCOS) device with a large birefringence (∆n = 0.2028 at 1550 nm) of the liquid crystal (LC) mixture. The experimental analysis of the optical beam steering angles at different LCOS grating periods is reported. A maximum beam steering angle of ±15.6 o is measured for the fine grating pitch of 3.6 µm with a 1 st -order diffraction efficiency (η1) of 2.28%. Also, the experimental results obtained were verified with the grating equation and numerical simulation. The wide optical beam steering capabilities of our fabricated LCOS device show great potential applications in solid-state LiDAR for future autonomous vehicles.

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Section: Introductionmentioning

confidence: 99%

Wide Optical Beam Steering LCOS Device for Solid-State LiDAR Applications

Son,

Meetei,

Park

et al. 2024

IEEE Photon. Technol. Lett.

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“…Commercially, micro-electromechanical systems (MEMS) and liquid crystal on silicon (LCoS) spatial light modulator (SLM) switches are two primary competing technologies used in 1 × N WSS systems [6][7][8]. As early as in 2002, American researchers at Bell Laboratories combined multiplexer, demultiplexer, optical attenuator, and other optical components to create WSS based on planar lightwave circuit(PLC) [9].…”

Section: Introductionmentioning

confidence: 99%

Optical Design of an LCoS-Based 1 × 10 WSS with High Coupling Efficiency and Compact Light Paths

Ji,

Shan,

et al. 2023

Photonics

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In the field of communication, the utilization of Liquid Crystal On Silicon (LCoS) in Wavelength Selective Switch (WSS) systems holds great promise. However, the lack of research on the optical path design of LCoS-based WSS makes it challenging to realize high-port-count and perfect performance with a compact structure. In this paper, the conceptual optical path design method of a compact LCoS-based 1 × 10 WSS system working in C-band (1529 nm–1568 nm) is proposed, where there exists 1 input port and 10 output ports in the same array. The optical powers in both the wavelength and deflection directions have been meticulously considered separately, while the polarization-independent structure has been designed novelty, which boost system compactness and lowers manufacturing costs. Finally, a high fiber-to-fiber coupling efficiency of an idealized system ranging from 95.07 to 99.18% with only five components is achieved. Furthermore, a brief tolerance analysis to demonstrate the instrumentation feasibility is also conducted and the additional losses that will be introduced by real experiments are discussed. Our work is pioneering in providing a more straightforward methodology and conceptual model for WSS system design and offering reference significant for high-port-count systems.

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“…Commercially, micro-electromechanical systems(MEMS) and liquid crystal on silicon (LCoS) spatial light modulator (SLM) switches are two primary competing technologies used in 1×N WSS systems [5][6][7]. As early as in 2002, American researchers at Bell Laboratories combined multiplexer, demultiplexer, optical attenuator, and other optical components to create WSS based on planar lightwave circuit(PLC) [8].…”

Section: Introductionmentioning

confidence: 99%

Optical Design of an LCoS-based 1×10 WSS with High Coupling Efficiency and Compact Light Paths

Ma¹,

Ji²,

Shan³

et al. 2023

Preprint

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In the field of communication, liquid crystal on silicon (LCoS) wavelength selection switches (WSS) systems are of great significance but the lack of research on its optical path design makes it challenging to realize high-port-count and perfect performance with a compact structure. In this paper, the optical path design method of a compact LCoS-based 1×10 WSS system working in C-band (1529nm~1568nm) is proposed, where there exists 1 input port and 10 output ports in the same array. The distribution of optical power in the two directions is taken into account independently, boosting system compactness, lowering assembly and manufacturing costs. Finally, a high fiber-to-fiber coupling efficiency ranging from 95.07% to 99.18% is achieved, corresponding to ultra-low simulation loss of less than 0.22dB. Furthermore, a brief tolerance analysis to demonstrate the instrumentation feasibility is also conducted. Our work is pioneering in providing a more straightforward evaluation method and a more workable solution for the optical design of WSS systems.

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Research of two-dimensional beam steering in LCOS-based wavelength selective switch

Cited by 6 publications

References 14 publications

Wide Optical Beam Steering LCOS Device for Solid-State LiDAR Applications

Wide Optical Beam Steering LCOS Device for Solid-State LiDAR Applications

Optical Design of an LCoS-Based 1 × 10 WSS with High Coupling Efficiency and Compact Light Paths

Optical Design of an LCoS-based 1×10 WSS with High Coupling Efficiency and Compact Light Paths

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