2014英特爾ISEF獲獎作品摘要 物理學和天文學 Intel Finalist Abstract Physics and Astronomy

獲獎作品基本信息

年份	2014
學科	物理與天文學 Physics and Astronomy
國家/州	United State of America

獲獎作品名稱

Optimizing the Process of Single Photons Coupling into Single-Mode Fibers by Using a Genetic Algorithm and Spatial Light Modulation

獲獎作品摘要

The purpose of the experiment was optimizing the process of coupling single photons into single-mode fibers.?

The reason I chose polarization-entangled photons was that they are widely used in quantum Physics. They are produced within Spontaneous Parametric Down Conversion type II. Coupling photons into fibers is very challenging due to many variables which impact propagation paths. I decided to optimize the process by modulating? the paths by using a Spatial Light Modulator (SLM). The major difficulty was to optimize diffraction patterns displayed on the SLM. To achieve that I chose a genetic algorithm because it requires little knowledge about experimental setup and despite that it is highly efficient. No other algorithm would be so universal. My research shows this algorithm is suitable for all kinds of single-photons optimizing applications. Having done numerous experiments I obtained about 9000 detected single photons/second coupled into the fiber, starting from about 3400 detected single photons/second coupled into the fiber, after running my algorithm for about 2 hours. That confirms the algorithm is time-efficient and increases the number of coupled photons by about 2.5 times. Moreover, it significantly stabilizes the signal.

To conclude, the genetic algorithm can be very useful in all types of quantum laboratories using photonic qubits as well as quantum systems using photons, as it lowers operating expenses and saves time. Specialists’ visits will no longer be needed. Automatization of optimizing processes could also increase commercial use of quantum devices. Therefore I intend to continue working on a fully-integral FPGA device.

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高中生科研學術活動 英特爾 Intel ISEF 簡介

英特爾國際科學與工程大獎賽，簡稱 "ISEF"，由美國 Society for Science and the Public（科學和公共服務協會）主辦，英特爾公司冠名贊助，是全球規模最大、等級最高的中學生的科研科創賽事。ISEF 的學術活動學科包括了所有數學、自然科學、工程的全部領域和部分社會科學。ISEF 素有全球青少年科學學術活動的“世界杯”之美譽，旨在鼓勵學生團隊協作，開拓創新，長期專一深入地研究自己感興趣的課題。

學科簡介：物理與天文學 Physics and Astronomy

Physics is the science of matter and energy and of interactions between the two. Astronomy is the study of anything in the universe beyond the Earth.

Subcategories:

Atomic, Molecular, and Optical Physics?(AMO):?The?study of atoms, simple molecules, electrons, light, and their interactions.? Projects studying?non-solid state?lasers and masers also belong in this subcategory.

Astronomy and Cosmology?(AST):?The study of space,? the universe as a whole, including its origins and evolution, the physical properties of objects in space and computational astronomy.

Biological Physics?(BIP):?The study of the physics of biological processes and systems.

Condensed Matter and Materials?(MAT):?The study of the properties of solids and liquids. Topics such as superconductivity, semi-conductors, complex fluids, and thin films are studied.

Mechanics?(MEC):?Classical physics and mechanics, including the macroscopic study of forces, vibrations and flows; on solid, liquid and gaseous materials.?Projects studying aerodynamics or hydrodynamics also belong in this subcategory.

Nuclear and Particle Physics?(NUC):?The study of the physical properties of the atomic nucleus and of fundamental particles and the forces of their interaction.?Projects developing particle detectors also belong in this subcategory.

Theoretical, Computational, and Quantum Physics?(THE):?The study of nature, phenomena and the laws of physics employing mathematical or computational methods?rather than experimental processes.

Other?(OTH):?Studies that cannot be assigned to one of the above subcategories. If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.

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