Investigation of the state of polarization distribution generated by polarization scramblers on the Poincarè sphere

Perlicki, Krzysztof

doi:10.1016/j.optcom.2005.04.002

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…For example, grating-based spectrometers are sensitive to the polarization of collected light [1], and the input polarization may cause errors to space-based instruments for earth observation [2]. In optical communications, especially in long-haul and high bit-rate fiber transmission systems, polarization may lead to impairments such as polarization mode dispersion, polarization dependent loss/gain, and polarization hole burning [3,4]. To address these issues, depolarizing has to be introduced.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal depolarizer based on photoalignment technology

Wei¹,

Chen²,

Ge³

et al. 2016

Photon. Res.

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We propose a depolarizer based on the principle of a collection of half-wave plates with randomly distributed optic axes. The design is demonstrated by means of dynamically photopatterning liquid crystal into randomly aligned homogeneous domains. We characterize the liquid crystal depolarizer for 1550 nm and C-band (1520-1610 nm). A degree of polarization of less than 5% is obtained for any linearly polarized light. This study provides a practical candidate for high-performance depolarizers.

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Section: Introductionmentioning

confidence: 99%

Liquid crystal depolarizer based on photoalignment technology

Wei¹,

Chen²,

Ge³

et al. 2016

Photon. Res.

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“…Therefore it is possible to determine, via process tomography, voltage settings that realize a required quantum channel, and use them in further experiments. Moreover, further improvement could be made by using a larger number of squeezing elements, equal to 5 or 6, which, as suggested in [19], should significantly improve the performance of the polarization controller.…”

Section: Resultsmentioning

confidence: 99%

“…We note that scrambling the SOP of optical fields is an important technique in fiber optic communications, which can reduce the impact of deleterious polarizationdependent effects in practical transmission systems [18][19][20]. Compared to applications in high bit rate fiber communication systems, requirements set by proof-of-principle demonstrations of quantum protocols are somewhat different.…”

Section: Introductionmentioning

confidence: 99%

Fiber-optic realization of anisotropic depolarizing quantum channels

2008

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We employed an electrically-driven polarization controller to implement anisotropic depolarizing quantum channels for the polarization state of single photons. The channels were characterized by means of ancilla-assisted quantum process tomography using polarization-entangled photons generated in the process of spontaneous parametric down-conversion. The demonstrated depolarization method offers good repeatability, low cost, and compatibility with fiber-optic setups. It does not perturb the modal structure of single photons, and therefore can be used to verify experimentally protocols for managing decoherence effects based on multiphoton interference.Comment: 7 pages, 6 figure

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“…The convolution has regular algebraic properties, e.g., it is commutative, associative, distributive over addition and associative with scalar multiplication. In many areas of applications, such as signal processing or computer vision, the convolution of discrete functions is used: (2) where f : Z → Z and g : Z → Z.…”

Section: Convolutional Neural Networkmentioning

confidence: 99%

“…The following methods are currently used to monitor parameters in the physical layer: eye chart, methods based on monitoring of the signal subcarrier, asynchronous amplitude histogram technique, techniques of measuring relative delay between sidebands, parametric asynchronous eye diagram, asynchronous delay-tap sampling (ADTS). Each of the mentioned methods is characterized by different properties and limitations [2][3][4][5]. Very good properties are characterized by asynchronous techniques, which are char-T a b l e 1.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous monitoring of chromatic dispersion and optical signal to noise ratio in optical links using convolutional neural network and asynchronous delay-tap sampling

Mrozek¹,

Perlicki²,

Jakubiak³

2020

Optica Applicata

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The article presents a method for image analysis using asynchronous delay-tap sampling (ADTS) technique and convolutional neural networks (CNNs), allowing simultaneous monitoring of many phenomena occurring in the physical layer of the optical network. The ADTS method makes it possible to visualize the course of the optical signal in the form of characteristics (so-called phase portraits), which change their shape under the influence of phenomena (including chromatic dispersion, amplified spontaneous emission noise and other). Using the VPIphotonics software, a simulation model of the ADTS technique was built. After the simulation tests, 10 000 images were obtained, which after proper preparation were subjected to further analysis using CNN algorithms. The main goal of the study was to train a CNN to recognize the selected impairment (distortion); then to test its accuracy and estimate the impairment for the selected set of test images. The input data consisted of processed binary images in the form of two-dimensional matrices, with the position of the pixel. This article focuses on the analysis of images containing simultaneously the phenomena of chromatic dispersion and optical signal to noise ratio.

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Investigation of the state of polarization distribution generated by polarization scramblers on the Poincarè sphere

Cited by 7 publications

References 4 publications

Liquid crystal depolarizer based on photoalignment technology

Liquid crystal depolarizer based on photoalignment technology

Fiber-optic realization of anisotropic depolarizing quantum channels

Simultaneous monitoring of chromatic dispersion and optical signal to noise ratio in optical links using convolutional neural network and asynchronous delay-tap sampling

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