This PDF file includes:

• Section S1. Device characterizations using balanced splitters
• Section S2. Experimental setup
• Section S3. Noise
• Section S4. Offset correction
• Section S5. Error propagation
• Section S6. Proposed matrix-vector multiplication architecture
• Fig. S1. Balanced splitter characterization.
• Fig. S2. Diagram of the experimental pump-probe setup.
• Fig. S3. Diagram of the experimental setup for matrix-vector multiplication.
• Fig. S4. Noise for up to 20-μs measurements using a 125-MHz (New Focus, 1811) photodetector for different case scenarios.
• Fig. S5. Noise for up to 2-min measurements using a 200-kHz (New Focus, 2011) photodetector.
• Fig. S6. Example design of 2 × 2 matrix-vector multiplication.

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