The transmission of quantum noise through the basic systems used in optical computing is discussed. Multipliers, linear algebra processors, nonlinear elements, and cascaded systems involving detection and regeneration of light are examined.
Bahaa E. A. Saleh,
"Quantum noise in optical computing", Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); doi: 10.1117/12.23420; https://doi.org/10.1117/12.23420