Demonstration of a 3 × 4 tunable bandwidth WSS with tunable attenuation using compact spatial light paths

Xie, Dequan; Liu, Zichen; You, Quan; Yu, Shaohua

doi:10.1364/oe.25.011173

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…LCoS device combing with gratings can be further developed as programmable PSP for processing optical spectrum resources [15]. Recently, demonstrations have been reported on generating a reconfigurable PSP [15][16][17][18]. In [15], Gao et al proposed and demonstrated a flexible PSP based on a 4K LCoS with a minimum pixel spacing of 3.74 µm.…”

Section: Of 11mentioning

confidence: 99%

Programmable High-Resolution Spectral Processor in C-band Enabled by Low-Cost Compact Light Paths

Liu

Tao³

et al. 2020

Photonics

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The flexible photonics spectral processor (PSP) is an indispensable element for elastic optical transmission networks that adopt wavelength division multiplexing (WDM) technology. The resolution and system cost are two vital metrics when developing a PSP. In this paper, a high-resolution 1 × 6 programmable PSP is investigated and experimentally demonstrated by using low-cost compact spatial light paths, which is enabled by a 2 K (1080p) liquid crystal on silicon (LCoS) and two cascaded transmission gratings with a 1000 line/mm resolution. For each wavelength channel, the filtering bandwidth and power attenuation can be manipulated independently. The total insertion loss (IL) for six ports is in the range of 5.9~9.4 dB over the full C-band. The achieved 3-dB bandwidths are able to adjust from 6.2 GHz to 5 THz. Furthermore, multiple system experiments utilizing the proposed PSP, such as flexible spectral shaping and optical frequency comb generation, are carried out to validate the feasibility for the WDM systems.

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Section: Of 11mentioning

confidence: 99%

Programmable High-Resolution Spectral Processor in C-band Enabled by Low-Cost Compact Light Paths

Liu

Tao³

et al. 2020

Photonics

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“…But this system has large insertion loss, about 21 dB. The other is the WSS system based on liquid crystal on silicon spatial light modulator (LCOS-SLM) [9], [10], [11], [12], [13]. Fontaine et al [9] presented LCOS-based 5 × 5 WSS in 2012, insertion loss in extreme cases exceeds 20 dB.…”

Section: Introductionmentioning

confidence: 99%

LCOS-Based 3 × 3 Folded Wavelength Selective Switch With High-Resolution Spectral

Gao

Chen

2023

IEEE Photonics J.

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We propose and experimentally verify a 3 × 3 folded wavelength selective switch (WSS) scheme based on liquid crystal on silicon spatial light modulator (LCOS-SLM). This scheme adopts a concise double-layer folded structure that greatly reduced the structural complexity of the WSS system by using the same set of optical elements to accomplish twice beam deflection. The presented WSS is for the C-band, insertion loss is less than 13.2 dB, the spectral resolution is 1 GHz, the bandwidth tuning range is 16.25∼3750 GHz.

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“…The isolation degree of adjacent ports is greater than 25dB, the insertion loss of polarized light is 8dB, and the flexible configuration of ports is also supported. Nowadays, as a programmable diffractive optical element, LCoS SLM allows WSS systems to handle high-port-count networks and flex grid technology-enabled networks with good performance due to its high flexibility and structural stability [11]. Considering that the unpolarized light transmitted in fibers is not applicable to LCoS, polarization splitter elements are usually introduced into the WSS system to achieve polarization splitting, modulation and polarization combination.…”

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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Demonstration of a 3 × 4 tunable bandwidth WSS with tunable attenuation using compact spatial light paths

Cited by 8 publications

References 9 publications

Programmable High-Resolution Spectral Processor in C-band Enabled by Low-Cost Compact Light Paths

Programmable High-Resolution Spectral Processor in C-band Enabled by Low-Cost Compact Light Paths

LCOS-Based 3 × 3 Folded Wavelength Selective Switch With High-Resolution Spectral

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

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