US 12,244,354 B2
Systems and methods for analog computing using a linear photonic processor
Darius Bunandar, Boston, MA (US); Nicholas C. Harris, Menlo Park, CA (US); Michael Gould, La Honda, CA (US); Carl Ramey, Westborough, MA (US); and Tomo Lazovich, Cambridge, MA (US)
Assigned to Lightmatter, Inc., Boston, MA (US)
Filed by Lightmatter, Inc., Boston, MA (US)
Filed on Feb. 14, 2024, as Appl. No. 18/441,231.
Application 18/441,231 is a continuation of application No. 18/139,431, filed on Apr. 26, 2023, granted, now 11,936,434.
Application 18/139,431 is a continuation of application No. 17/840,515, filed on Jun. 14, 2022, granted, now 11,671,182, issued on Jun. 6, 2023.
Application 17/840,515 is a continuation of application No. 16/940,900, filed on Jul. 28, 2020, granted, now 11,398,871, issued on Jul. 26, 2022.
Claims priority of provisional application 62/939,480, filed on Nov. 22, 2019.
Claims priority of provisional application 62/879,936, filed on Jul. 29, 2019.
Prior Publication US 2024/0187111 A1, Jun. 6, 2024
Int. Cl. H04B 10/80 (2013.01); G06F 1/28 (2006.01); H03K 19/21 (2006.01)
CPC H04B 10/801 (2013.01) [G06F 1/28 (2013.01); H03K 19/21 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A photonic processor configured to perform a matrix-vector multiplication operation between an input vector and a matrix, the photonic processor comprising:
a first plurality of optical modulators configured to generate first optical signals by each encoding a value of a vector element of the input vector into one of a plurality of received input optical signals, wherein received input optical signals have different wavelengths;
a second plurality of optical modulators, each optically coupled to an optical modulator of the first plurality of optical modulators and configured to generate second optical signals by encoding values of matrix elements of the matrix into the first optical signals;
a first plurality of optical combiners each optically coupled to an output of an optical modulator of the second plurality of optical modulators, the first plurality of optical combiners configured to generate a first combined optical signal using the second optical signals; and
a first optical detector optically coupled to an output of the first plurality of optical combiners and configured to generate a first photocurrent based on the first combined optical signal, the first photocurrent representing a portion of the matrix-vector multiplication operation.