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A new publication from Opto-Electronic Advances discusses low-loss chip-scale programmable silicon photonic processors.

Integrated optical signal processors have been identified as a powerful engine for optical processing of optical signals. They enable wideband and stable signal processing operations on miniaturized chips with ultimate control precision. Currently, there is a significant interest in providing functional reconfigurability, to match a key advantage of programmable microelectronic processors.

To implement large-scale programmable PICs with a large number of tuning elements, the challenge is to lower the loss of photonic waveguides and minimize the random phase errors caused by the fabrication imperfection for the phase-shifters of those tuning elements.

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