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| Title | Optical time-domain reflectometry based on second-order interference: выпускная квалификационная работа магистра: направление 11.04.02 «Инфокоммуникационные технологии и системы связи» ; образовательная программа 11.04.02_07 «Лазерные и оптоволоконные системы (международная образовательная программа) / Laser and Fiber Optic System (International Educational Program)» |
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| Creators | Хуан Хуа |
| Scientific adviser | Ушаков Николай Александрович |
| Other creators | Nikolai Alexandrovich Ushakov |
| Organization | Санкт-Петербургский политехнический университет Петра Великого. Институт электроники и телекоммуникаций |
| Imprint | Санкт-Петербург, 2026 |
| Collection | Выпускные квалификационные работы ; Общая коллекция |
| Subjects | super-Poissonian photon statistics ; quantum-inspired interferometry ; photon bunching ; electro-optic modulation ; optical metrology |
| Document type | Master graduation qualification work |
| Language | Russian |
| Level of education | Master |
| Speciality code (FGOS) | 11.04.02 |
| Speciality group (FGOS) | 110000 - Электроника, радиотехника и системы связи |
| DOI | 10.18720/SPBPU/3/2026/vr/vr26-5928 |
| Rights | Доступ по паролю из сети Интернет (чтение, печать, копирование) |
| Additionally | New arrival |
| Record key | ru\spstu\vkr\45339 |
| Record create date | 9/8/2026 |
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Classical spectral interferometry is a cornerstone of modern optical metrology, yet its performance is fundamentally limited by shot noise and parasitic interferences. Quantum and quantum-inspired approaches promise to overcome these limits but often at the cost of system complexity. In this work, we demonstrate a simple and robust method for generating bright optical radiation with super-Poissonian photon statistics using a standard single-mode fiber setup. The source is realized by amplitude-modulating a continuous-wave laser with a broadband electro-optic modulator driven by Gaussian noise. By controlling the DC bias point on the modulator’s cosine transfer function and the amplitude of the modulating noise, the photon-number distribution can be continuously tuned from Poissonian to super-Poissonian. A Hanbury Brown–Twiss interferometer with single-photon detectors is employed to record coincidence histograms and evaluate the normalized second-order correlation function. We show that the highest bunching peak, corresponding to strongly super-Poissonian statistics, appears when the modulator is biased at the minimum transmission point, where the intensity distribution becomes exponential. Interestingly, a comparable enhancement can also be achieved by operating at the linear point with a sufficiently large noise amplitude, leading to a bimodal intensity distribution. This alternative regime offers better signal-to-noise ratio and improved stability, making the source attractive for practical quantum-inspired interferometric measurements.
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