Chongfan Technology
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24
2026
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06
Integrated Programmable All-Optical Signal Processor
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The team led by Chaoran Huang at the Chinese University of Hong Kong has proposed an integrated programmable optical signal processor (OSP) that can serve as a nonlinear universal equalizer and perform all-optical, DSP-free real-time equalization. A cursor‑based scheme, employing all‑optical readout in deep‑level memory cells, achieves a sampling resolution of approximately 1 picosecond (ps) with a tunable storage window. This OSP can simultaneously equalize eight wavelength‑division multiplexing (WDM) channels, delivering a total throughput of 1.6 terabits per second while maintaining a latency below 60 picoseconds and consuming only tens of femtojoules per bit. Operating prior to detection, it provides superior dispersion compensation, alleviates transceiver bandwidth constraints and fiber‑optic nonlinearities, and expands the usable WDM window by a factor of 6.8.
The research findings were published in Science on June 11, 2026, under the title “An all-optical signal processor enabling terabit-per-second real-time equalization.”
Figure 1: OSP Architecture and Implementation
Figure 2: Dispersion-Dominated Link Compensation
Figure 3: Compensation for Bandwidth-Limited and Nonlinear Links
Figure 4: OSP Programmability
Figure 5: Implementation of 1.6T WDM DCIs
Source: Optics World
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