Computation using a network of optical parametric oscillators
In one aspect, a computational machine includes an optical device configured to receive energy from an optical energy source and generate a number N 1 of optical signals, and a number N 2 of coupling devices, each of which controllably couples a plurality of the number N 1 optical signals. The coupling devices are individually controlled to simulate a computational problem. In another aspect, a computational machine includes a number N 1 of parametric oscillators and a number N 2 of coupling devices, each of which controllably couples a plurality of the number N 1 of parametric oscillators together. The coupling devices are individually controlled to simulate a computational problem.
1. A computational machine, comprising:
an optical device configured to receive energy from an optical energy source and generate a number N 1 of optical signals, N 1 is 2 or greater; and
a number N 2 of coupling devices, each of which controllably couples a plurality of the number N 1 of optical signals, N 2 is 1 or greater;
wherein the coupling devices are individually controlled to simulate a computational problem.
2. The computational machine of claim 1 , wherein the optical energy source is a laser.
3. The computational machine of claim 1 , further comprising a controller configured to control the optical energy source to produce energy in a predefined pattern.
4. The computational machine of claim 1 , wherein the number N 2 is equal to one half of the value N 1 squared minus N 1 (N 2 =(N 1 ^2−N 1 )/2.
5. The computational machine of claim 1 , wherein the number N 2 is equal to the value N 1 minus one (N 2 =N 1 −1).
6. The computational machine of claim 1 , wherein the number N 2 is equal to one (N 2 =1).
7. The computational machine of claim 1 , wherein the N 1 optical signals are generated from a plurality of optical parametric oscillators (OPOs).
8. The computational machine of claim 7 , wherein the OPOs are implemented using microresonators.
9. The computational machine of claim 1 , configured to produce and maintain the N 1 optical signals within one resonant cavity or one optical fiber.
10. The computational machine of claim 1 , wherein the coupling devices include electro-optic modulators (EOMs).
11. The computational machine of claim 1 , wherein the computational problem is one of a nondeterministic polynomial (NP) problem, an Ising problem, or an optimization problem.
12. The computational machine of claim 1 , configured to produce a set of numbers from a plurality of the N 1 signals, wherein the produced numbers contain information about a solution of the computational problem.
13. The computational machine of claim 12 , wherein the produced numbers determine a solution to the computational problem.
14. The computational machine of claim 12 , wherein the produced numbers are generated from the phases of a plurality of the N 1 signals.
15. The computational machine of claim 12 configured to provide a phase reference, wherein at least one of the N 1 optical signals is compared to the phase reference to produce the numbers.
16. The computational machine of claim 12 , wherein at least two of the N 1 signals are compared to each other to produce the numbers.
17. A computational machine, comprising:
a number N 1 of parametric oscillators, N 1 is 2 or greater; and
a number N 2 of coupling devices, each of which controllably couples a plurality of the number N 1 of parametric oscillators together, N 2 is 1 or greater;
wherein the coupling devices are individually controlled to simulate a computational problem.
18. The computational machine of claim 17 , wherein the parametric oscillators are optical parametric oscillators.
19. The computational machine of claim 18 , wherein the optical parametric oscillators are selected from continuous wave degenerate optical parametric oscillators and pulsed degenerate optical parametric oscillators.
20. The computational machine of claim 17 , wherein the parametric oscillators are time-multiplexed in one optical cavity or optical fiber.