2021-03-03T14:04:49Z
https://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/173715
2019-01-04T01:55:17Z
com_10261_2855
com_10261_4
col_10261_2864
http://hdl.handle.net/10261/173715
10.1109/CLEOE-EQEC.2017.8086462
353503
A complex network of 1600 holographically coupled opto-electronic oscillators: Network dynamics and utilisation for reservoir computing
Institute of Electrical and Electronics Engineers
2017
Brunner, Daniel
Jacquot, Maxime
Larger, Laurent
Fischer, Ingo
rp08321
Photonics
Couplings
Laser beams
Complex networks
Oscillators
Reservoirs
Chaos
2017
Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).-- Date of Conference: 25-29 June 2017.-- Conference Location: Munich, Germany.
Networks of photonic elements are a key enabling technology for the realization of multiple next generation photonic systems. Phased beam arrays, coherent beam combining or neuromorphic computing in photonic networks: all these high-impact applications fundamentally require coupling between a large number of photonic components. Recently, a small network of ~20 semiconductor lasers based on coupling via a holographic element was reported [1]. However, the demonstration of large-scale complex photonic networks is lacking.Here, we demonstrate the scalability of holographic coupling, creating a large scale complex network of 1600 opto-electronic oscillators. The network's nonlinear nodes are implemented using a spatial light modulator (SLM) operated in intensity modulation mode. Imaging the SLM-surface through a polarizing beam splitter (PBS) onto a camera and closing the loop between camera and the SLM, we realize a nonlinear iterative map. The state of SLM pixel n is then given by I n (t + 1) = sin 2 (κI n (t) + φ 0 ). Here, I n (t)is the nth pixel intensity at time t, κ the feedback gain and φ 0 a constant phase offset. This equation corresponds to a simplified version of the Ikeda map. Figure 1 (a) schematically illustrates the experimental implementation. An exemplary bifurcation diagram for node (23, 8) is shown in Fig. 1 (b). The route to chaos shown in Fig. 1(b) exhibits the period-doubling behaviour expected from such an Ikeda system.