US 12,332,539 B2
Reconfigurable all-optical activation functions having normalized output power
Yuan Yuan, Milpitas, CA (US); Yiwei Peng, Houston, TX (US); Stanley Cheung, Milpitas, CA (US); and Zhihong Huang, Milpitas, CA (US)
Assigned to Hewlett Packard Enterprise Development LP, Spring, TX (US)
Filed by HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP, Houston, TX (US)
Filed on Oct. 25, 2022, as Appl. No. 17/972,927.
Prior Publication US 2024/0134247 A1, Apr. 25, 2024
Prior Publication US 2024/0231180 A9, Jul. 11, 2024
Int. Cl. G02F 1/35 (2006.01); G02F 1/355 (2006.01); G02F 1/365 (2006.01); H01S 5/34 (2006.01); H01S 5/343 (2006.01)
CPC G02F 1/3517 (2013.01) [G02F 1/3503 (2021.01); G02F 1/3556 (2013.01); G02F 1/365 (2013.01); H01S 5/3412 (2013.01); H01S 5/343 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A nonlinear activation device, comprising:
an interferometer comprising a first branch formed of a first waveguide and a second branch formed of a second waveguide;
a resonator cavity coupled to the first waveguide;
at least one phase-shift mechanism coupled to one of the second waveguide and the resonator cavity, the at least one phase-shift mechanism configured to control biases of the interferometer to achieve a desired activation function at an output of the interferometer; and
an optical amplification mechanism coupled to the output of the interferometer and configured to add optical gain to the desired activation function, wherein the optical amplification mechanism comprises:
a cathode formed on a third waveguide coupled to the output of the interferometer;
a mesa structure formed on the cathode, the mesa structure comprising an optically active medium; and
an anode formed on the mesa structure,
wherein the cathode is formed between the third waveguide and the anode, and
wherein the optically active medium emits light based on a bias applied between the cathode and the anode.