Design of a low-cost and compact 1 × 5 wavelength-selective switch for access networks

Lu, Tianxin; Collings, N.; Robertson, Brian; Chu, Daping

doi:10.1364/ao.54.008844

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…Currently, the spatial light modulator (SLM) utilizing LCoS (LCoS-SLM) is the most competing technique adopted in the design of multiple port WSSs [10][11][12][13][14]. LCoS device combing with gratings can be further developed as programmable PSP for processing optical spectrum resources [15].…”

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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“…Moreover, hologram beam steering switches based on LCoS spatial light modulator (SLM) have been reported as a promising optical switch technology for edge node application [12]. However, the previously demonstrated optical switches based on LCoS devices, even supporting multicasting, were limited to a 1xN switching architecture [13][14][15]. Although an MxN optical wavelength switch based on LCoS-SLM has been reported [16], the evaluation works were only performed through a symmetrical switching architecture.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Optical Wavelength Switch Based on LCoS-SLM for Edge Node of Optical Access Network

Chou

Chen

2021

IEEE Photonics J.

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A novel design of optical wavelength switch, based on an asymmetric switching architecture for edge node implementation, is presented in this paper. Compared to previous research for optical core transport network applications, the proposed work has a unique aspect to build dynamic multicasting and spectral equalization, vital functionalities for optical wavelength switch in the edge of optical access networks. An optical wavelength switch was experimentally implemented and evaluated in a 4x16 switching architecture to demonstrate the concept. This dynamic multicasting and spectral equalization were achieved by utilizing liquid crystal on a silicon spatial light modulator (LCoS-SLM) device. An optimal design of computer-generated holograms (CGHs) through an improved GS algorithm was used to perform the beam steering and wavelength switching. A variety of wavelength switching scenarios has been experimentally evaluated. The measurement results showed an average insertion loss of around -12.5 dB, and the calculated crosstalks were all less than -28 dB. Its applications in digital data transmissions were evaluated to achieve a transmission speed larger than 2.5 Gbps. The eye diagram measurement results showed that most wavelength switching scenarios have nearly bit-error-free transmission. The scenario includes the multicasting with spectral equalization within the proposed asymmetrical switching architecture.

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“…Spatial light modulators (SLMs) are widely used in many integrated photonics and electronic systems for a wide range of applications, from conventional and holographic displays [1][2][3] to telecommunication wavelength-selective switches (WSS) [4,5] and biomedical optical tweezers [6,7].…”

Section: Introductionmentioning

confidence: 99%

Implementation of 10-Bit Phase Modulation for Phase-Only LCOS Devices Using Deep Learning

Tong

Pivnenko

Chu

2020

Adv Devices Instrum

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A deep learning model was built to optimize the phase flicker performance for given pulse width modulation (PWM) driving patterns of a liquid crystal on silicon (LCOS) device. 10-bit phase modulation was physically realized with a phase flicker of 0.055% over 1024 addressed phase levels in respect to the total modulation range of 2π and a separation probability of 62.63% for the phase to stay within its level without overlapping with the adjacent ones. The spatial information bandwidth of the full high-definition (HD) LCOS device at 100 Hz was improved by 25%, from ~1.6 Gb/sec to ~2 Gb/sec.

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Design of a low-cost and compact 1 × 5 wavelength-selective switch for access networks

Cited by 6 publications

References 32 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

Asymmetric Optical Wavelength Switch Based on LCoS-SLM for Edge Node of Optical Access Network

Implementation of 10-Bit Phase Modulation for Phase-Only LCOS Devices Using Deep Learning

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