READ ME File For 'coherent network phase stabilization dataset'

Dataset DOI: 10.5258/SOTON/D1305


This dataset supports the publication:
Salih Yanikgonul, Ruixiang Guo, Angelos Xomalis, Anton N. Vetlugin, Giorgio Adamo, Cesare Soci, and Nikolay I. Zheludev (2020). 
Phase stabilization of a coherent fibre network by single-photon counting 
in Optics Letters


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This research data description should be read and understood in the context of the corresponding manuscript. The figure numbers correspond to the figure numbers of the manuscript and the data corresponds to the data as shown in the figures.


The figure descriptions as given in the corresponding manuscript are given below.  

The file contains the data for figures 2-4 (Figure 1 being a schematic diagram)


Figure 1: Long-term phase stabilization in a fully-fiberized MZI. a) The noise spectral density of phase fluctuations of the unstabilized system, measured by sending a CW-laser of µW power through the same interferometer, decreases by 1/f^2.9 until 1 Hz beyond which a broadband noise dominates. b) The long-term phase stabilization where the system is stabilized for 7 hours, followed by another 7 hours without stabilization (only one hour is shown). Each blue circle corresponds to single-photon counts with the red line being the corresponding phase delay retrieved from these counts. The black line represents the stabilization point. c) The corresponding phase distributions for the stabilized (blue) and unstabilized (red) periods, where the blue line is the Gaussian fit curve.

Figure 2: Single-photon manipulation in coherent optical fibre networks stabilized by single-photons. a) Single-photon interference in a fully-fiberized MZI (Fig. 1(b)). Out-of-phase oscillation of Nc and Nd is in a good agreement with Eqs. (1,2). b) Single-photon absorption control with a CPA (Fig. 1(c)). As each point corresponds to a single measurement, the dispersion is defined by the Poisson distribution.

Figure 3: Dissipative single-photon switching. The raw data: a) The modulation signal applied to the fibre stretcher driving the system between coherent absorption (CAR) and transmission regimes (CTR). b) The coincident photon detection signal between SPD-c & SPD-h and SPD-d & SPD-h. ((a) and (b) share the x-axis, of which broken parts correspond to phase stabilization periods.) c) The coincidence counts distribution of coherent absorption (red) and transmission (blue) cycles.



Geographic location of data collection: Nanyang Technological University, Singapore

Related projects:
Singapore A*STAR QTE program (SERC A1685b0005)
Singapore Ministry of Education (MOE2016-T3-1-006 (S)) 
UK Engineering and Physical Sciences Research Council (EP/M009122/1)


Dataset available under a CC BY 4.0 licence


Publisher: University of Southampton, U.K.


Date: March 2020