Optical spike-timing-dependent plasticity with weight-dependent learning window and reward modulation
- 17 September 2015
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 23 (19), 25247-58
- https://doi.org/10.1364/oe.23.025247
Abstract
Optical spike-timing-dependent plasticity (STDP) synapses form the basis of learning in photonic neuromorphic system. In biological neural systems, STDP synapses generally have multiplicative boundary mechanisms, and can be modulated by a third factor such as dopamine. Analogously, we introduce a third factor into optical STDP: The current-injection of semiconductor optical amplifiers can be modified in an adaptive way according to local or global feedback signals. The local one is present synaptic weight, which elicits an optical weight-dependent STDP, while the global one is a reward signal. We demonstrate that the optical weight-dependent STDP can emulate the behavior of biological STDP synapses more closely, and can be seen as an intermediate configuration between additive and multiplicative STDP, which balances stability and competition among synapses. Simulation studies with scalable photonic neurons further show that optical STDP with reward modulation enables reward-based reinforcement learning.Funding Information
- National Natural Science Foundation of China (NSFC) (61104142, 61371074, 61471010)
This publication has 24 references indexed in Scilit:
- Relative Refractory Period in an Excitable Semiconductor LaserPhysical Review Letters, 2014
- Excitability and optical pulse generation in semiconductor lasers driven by resonant tunneling diode photo-detectorsOptics Express, 2013
- A Leaky Integrate-and-Fire Laser Neuron for Ultrafast Cognitive ComputingIEEE Journal of Selected Topics in Quantum Electronics, 2013
- Pulse lead/lag timing detection for adaptive feedback and control based on optical spike-timing-dependent plasticityOptics Letters, 2013
- Excitability in a semiconductor laser with saturable absorberOptics Letters, 2011
- Ultrafast All-Optical Implementation of a Leaky Integrate-and-Fire NeuronOptics Express, 2011
- STDP-driven networks and the C. elegans neuronal networkPhysica A: Statistical Mechanics and its Applications, 2010
- Nanoscale Memristor Device as Synapse in Neuromorphic SystemsNano Letters, 2010
- Dendritic Excitability and Synaptic PlasticityPhysiological Reviews, 2008
- Competitive Hebbian learning through spike-timing-dependent synaptic plasticityNature Neuroscience, 2000