Fig. 4: Proposed integrated silicon photonic WDM crossbar-based comparison unit. | Nature Communications

Fig. 4: Proposed integrated silicon photonic WDM crossbar-based comparison unit.

From: Nonlinear optical vector processing using linear silicon photonic circuits for 50 Gb/s memory and string similarity functions

Fig. 4

a Schematic diagram of the proposed WDM comparison cell, operating with N number of wavelength values. b Microscope image of the WDM-enabled silicon photonic HD processor. Highlighted: Search \({{{\rm{Bit}}}}\) and \(\overline{{{{\rm{Bit}}}}}\) EAMs (Search Vector Encoding Unit), comparison cell EAMs, Multiplexer and De-multiplexer modules. c Circuit schematic and experimental setup of the 3 wavelength (λ1,λ2 and λ3) 2 × 1 HD processor. The orange highlighted area depicts the optical Search Vector Encoding Unit. WDM wavelength division multiplexing, HD hamming distance.

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