Article

Quantum model for electro-optical amplitude modulation

ITEAM Research Institute, Universidad Politécnica de Valencia, C/ Camino de Vera s/n, 46022 Valencia, Spain.
Optics Express (Impact Factor: 3.53). 11/2010; 18(24):25127-42. DOI: 10.1364/OE.18.025127
Source: PubMed

ABSTRACT We present a quantum model for electro-optic amplitude modulation, which is built upon quantum models of the main photonic components that constitute the modulator, that is, the guided-wave beamsplitter and the electro-optic phase modulator and accounts for all the different available modulator structures. General models are developed both for single and dual drive configurations and specific results are obtained for the most common configurations currently employed. Finally, the operation with two-photon input for the control of phase-modulated photons and the important topic of multicarrier modulation are also addressed.

Download full-text

Full-text

Available from: Carlos R. Fernandez-Pousa, Jul 06, 2015
0 Followers
 · 
132 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Many components that are employed in quantum information and communication systems are well known photonic devices encountered in standard optical fiber communication systems, such as optical beamsplitters, waveguide couplers and junctions, electro-optic modulators and optical fiber links. The use of these photonic devices is becoming increasingly important especially in the context of their possible integration either in a specifically designed system or in an already deployed end-to-end fiber link. Whereas the behavior of these devices is well known under the classical regime, in some cases their operation under quantum conditions is less well understood. This paper reviews the salient features of the quantum scattering theory describing both the operation of the electro-optic phase and amplitude modulators in discrete and continuous-mode formalisms. This subject is timely and of importance in light of the increasing utilization of these devices in a variety of systems, including quantum key distribution and single-photon wavepacket measurement and conformation. In addition, the paper includes a tutorial development of the use of these models in selected but yet important applications, such as single and multitone modulation of photons, two-photon interference with phase-modulated light or the description of amplitude modulation as a quantum operation.
    Laser & Photonics Review 11/2011; 5 (6)(750-772):(2011). DOI:10.1002/lpor.201000038
  • [Show abstract] [Hide abstract]
    ABSTRACT: We develop, to the best of our knowledge, the first model for an array waveguide grating (AWG) device subject to quantum inputs and analyze its basic transformation functionalities for single-photon states. A commercial, cyclic AWG is experimentally characterized with weak input coherent states as a means of exploring its behaviour under realistic quantum detection. In particular it is shown the existence of a cutoff value of the average photon number below which quantum crosstalk between AWG ports is negligible with respect to dark counts. These results can be useful when considering the application of AWG devices to integrated quantum photonic systems.
    Optics Express 06/2013; 21(12):14841-14852. DOI:10.1364/OE.21.014841
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We propose a novel source based on a dual-drive modulator that is adaptable and allows Alice to choose between various practical quantum key distribution (QKD) protocols depending on what receiver she is communicating with. Experimental results show that the proposed transmitter is suitable for implementation of the Bennett and Brassard 1984 (BB84), coherent one-way (COW) and differential phase shift (DPS) protocols with stable and low quantum bit error rate. This could become a useful component in network QKD, where multi-protocol capability is highly desirable.
    Optics Express 08/2013; 21(17):19579-19592. DOI:10.1364/OE.21.019579