Temat: Mach-Zehnder interferometer

Skocz do pozycji: 1.

Tytuł:: Design of a photonic unitary neural network based on MZI arrays
Autorzy:: Zhang, Ye
Wang, Ruiting
Zhang, Yejin
Su, Yanmei
Wang, Pengfei
Luo, Guangzhen
Zhou, Xuliang
Pan, Jiaoqing
Tematy:: optical neural network
unitary matrix
Mach-Zehnder interferometer; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/58970251.pdf Link otwiera się w nowym oknie
Opis:: In recent years, optical neural networks have attracted widespread attention, due to their advantages of high speed, high parallelism, high bandwidth, and low power consumption. Photonic unitary neural network is a kind of neural networks that utilize the principles of unitary matrices and photonics to perform computations. In this paper, we design a photonic unitary neural network based on Mach–Zehnder interferometer arrays. The results show that the network has a good performance on both triangular and circular binary classification datasets, where most of the data points are correctly classified. The accuracies achieve 97% and 95% for triangular and circular datasets, with the loss function values of 0.023 and 0.046, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Phase coding of information in the optical fibre sensor
Autorzy:: Życzkowski, M.
Karol, M.
Pałka, N.
Tematy:: optical fibre sensors
Mach-Zehnder interferometer
quantum sensors; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/1818224.pdf Link otwiera się w nowym oknie
Opis:: Determining the dependence of phase difference modulations between light pulses in a modified Mach-Zehnder interferometer was used to develop an optical system coding the information and working as an eavesdropping sensor for an optical fibre information exchange system. The basic challenge in the system development is to maintain stable operation in changing environmental conditions, as well as to ensure optimal parameters of the phase modulator. The system was tested for various many-kilometer long transmission lines of single-mode fibres. The research was focused on achieving the normative Bit Error Rate for the system in the 100 Mbit/s range (STM-1). Such a system can be used in commercial applications for the code key secure transmission in the physical layer of the link.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Vibration sensing with the optical fibre Mach-Zehnder interferometer
Autorzy:: Kurzych, Anna T.
Jaroszewicz, Leszek R.
Tematy:: Mach-Zehnder interferometer
vibration sensor
optical fibre technology; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/27315693.pdf Link otwiera się w nowym oknie
Opis:: Vibration is a ubiquitous phenomenon that occurs in everyday life and people are exposed to it almost all the time. Most often, vibration is measured using electromechanical devices such as piezoelectric, piezoresistive, or capacitive accelerometers. However, attention should be paid to the limitations of such vibration sensors. They cannot operate in the presence of strong electromagnetic fields. Measurements with electromechanical devices require physical contact between the sensor and the vibrating object, which is not always possible due to the design of the sensor and device. The possibility of a non-contact vibration measurement in harsh environments is provided by the technology of interferometric fibre optic sensors. This paper reports the principle of operation, design aspects, experimentation, and performance of a Mach-Zehnder interferometric setup for the measurement of vibration frequency. There are different sensing arms implemented in the interferometer: single-mode, polarization-maintaining, and tapered optical fibre. The paper emphasises the simplicity of the set-up structure and the detection capabilities based on the interferometric sensing giving the possibility of constructing a commercial vibration sensor for all industry demands.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A MZI-based optical neural network for image classification
Autorzy:: Zhang, Ye
Zhang, Saining
Zhang, Danni
Wang, Ruiting
Su, Yanmei
Yi, Junkai
Wang, Pengfei
Luo, Guangzhen
Zhou, Xuliang
Pan, Jiaoqing
Tematy:: optical neural network
image classification
Mach-Zehnder interferometer; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/58970215.pdf Link otwiera się w nowym oknie
Opis:: In recent years, with the expansion of information, artificial intelligence technology has been developed and used in various fields. Among them, optical neural network provides a new type of special neural network accelerator chip solution, which has the advantages of high speed, high bandwidth, and low power consumption. In this paper, we construct an optical neural network based on Mach–Zehnder interferometer. The experimental results on the image classification of MNIST handwritten digitals show that the optical neural network has high accuracy, fast convergence and good scalability.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A microfluidic system for analysis of electrochemical processing using a highly sensitive optical fiber microcavity
Autorzy:: Śmietana, Mateusz
Janik, Monika
Krześniak, Andrzej
Koba, Marcin
Gabler, Tomasz
Jönsson-Niedziółka, Martin
Wydawca:: Elsevier
Cytata wydawnicza:: Optics and Lasers in Engineering 158 (2022) 107173. https://doi.org/10.1016/j.optlaseng.2022.107173
Opis:: National Science Centre Poland (NCN), NCN 2018/29/B/ST7/02552
Microfluidics provide unique possibilities to control tiny volumes of liquids and their composition. In this work we combined a microfluidic system with a microcavity in-line Mach-Zehnder interferometer (μIMZI) induced in the side surface of a single-mode optical fiber using a femtosecond laser micromachining. The μIMZI shows capability for investigating optical properties of volumes down to picoliters with an exceptionally high refractive index sensitivity. Here we report numerical analysis and experimental results that show that when the μIMZI is incorporated with the microfluidic system the measurements can be performed with sensitivity exceeding 14,000 nm/RIU which is similar to measurements done under static conditions. In a flow injection system, we show the influence of flow rate and injection volume on the response, and that the orientation of the cavity versus the flow direction has only a minor impact on the results. Finally, we have supported the system by band electrodes making it possible to induce redox reactions in the microchannel to detect the flowing products of the reactions optically. It has been found that thanks to the high sensitivity of the μIMZI the products of the reactions can be clearly detected both electrochemically and optically even when the only part of the flowing redox probe is oxidized at the band electrode. The capability for monitoring the products was shown for a standard redox probe, potassium ferricyanide, as well as for the neurotransmitter dopamine. This work shows that the proposed solution may offer highly sensitive optical measurements, even when the chemical reactions are not effective in the whole volume of the system.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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na półce

Skocz do pozycji: 6.

Tytuł:: A CROW/MZI-based switch for silicon photonics applications
Autorzy:: Elkattan, Mohamed
Gad, Michael
Tematy:: silicon photonics
integrated optics
switching
modulation
ring resonators
Mach-Zehnder interferometer; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:: https://bibliotekanauki.pl/articles/59112877.pdf Link otwiera się w nowym oknie
Opis:: In this work, the authors propose the design of an electro-optical silicon-photonics hitless switch that follows wavelength-division multiplexing (WDM) conditions in terms of channel bandwidth, shape factor, and free spectral range. Through a careful step-by-step design, the authors study a switch device composed of a coupled-resonator optical waveguide (CROW) structure merged with a Mach-Zehnder interferometer (MZI) modulator. The MZI modulator controls the coupling to the CROW and hence turns the switch on and off. The traditional matrix analysis of the CROW structure is modified to accommodate the MZI modulator section. The proposed switch requires a chip area of less than 0.01225 mm². The switch transmission satisfies WDM requirements with a channel-free spectral range of 100 GHz, channel flat-top response with a passband for the through/drop ports of 64.6 GHz/33 GHz, and a shape factor of 0.76/0.6. Besides, the switch transmission features an insertion loss for the through/drop ports of 0.23/1 dB, a switching speed of 100 GHz, and a competitive switch-on/off ratio of 33 dB.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: In-fiber Mach–Zehnder interferometer based on polarization-maintaining fiber for displacement and temperature sensing
Autorzy:: Cheng, Jun-Ni
Jiang, Xiao-Yan
Tematy:: displacement sensing
polarization-maintaining fiber
graded-index multimode fiber
Mach-Zehnder interferometer; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2202764.pdf Link otwiera się w nowym oknie
Opis:: A displacement sensor based on polarization-maintaining fiber has been proposed and proved in experiment. The polarization-maintaining fiber (PMF) is sandwiched with two graded-index multimode fibers (GI MMF), which form the Mach–Zehnder interferometer (MZI) sensor. Graded-index multimode fiber serve as an optical coupler for modes conversion. The results show that with the increase of displacement, the spectrum moves to the long wavelength direction, but when temperature increases, the spectrum has a red shift, which means that the displacement and temperature can be measured separately according to the wavelength drift direction. The sensor consists of 4 mm GI MMF and 14 mm PMF, which can exhibit the displacement sensitivity of –9.275 pm/μm in the range of 0–600 μm. In addition, temperature will also affect the sensitivity of displacement measurement, so the sensitivity of the sensor to temperature is also measured. The results show that the selected monitoring dip provides a better temperature sensitivity of 33.605 pm/°C in the range of 35–75°C. The sensor is easy to fabricate and does not has any functional coating, which make it become a good candidate in the industrial field.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 8.

Tytuł:: Investigation of liquids with microcavity in-line Mach-Zehnder interferometers – impact of the microcavity shape on the sensing performance
Autorzy:: Śmietana, Mateusz
Wang, Ying
Janik, Monika
Koba, Marcin
Liao, Changrui
Myśliwiec, Anna
Gabler, Tomasz
Jönsson-Niedziółka, Martin
Wydawca:: Elsevier
Cytata wydawnicza:: Optical Fiber Technology 73 (2022) 103059. https://doi.org/10.1016/j.yofte.2022.103059
Opis:: In this work, we review microcavity in-line Mach-Zehnder Interferometers (µIMZI) obtained in optical fibers using femtosecond (fs) laser micromachining. These structures can be considered as a great solution satisfying the requirements mentioned above for small-volume RI sensing applicable in label-free biosensing. Furthermore, application of the femtosecond laser facilitates tailoring of the microcavity’s shape with high degree of flexibility. Over the years, various µIMZI have been reported, where RI sensing has been mainly analyzed but no impact of the microcavity shape has been shown up to date. Thus, on top of the review on µIMZIs, in this work, we discuss the impact of the shape of the on the sensing performance of the device. We use two representative examples of microcavity shapes, i.e., U-shape and V-trench, made in a standard single-mode fiber. Despite different shapes, both structures offer similar and high RI sensitivity (exceeding 13,000 nm/RIU in the RI range 1.333–1.340 RIU). However, the performance of the structures in microfluidic systems is different. Based on the experimental results and numerical simulations, the advantages and disadvantages of different shapes are discussed for their application in investigations of liquids and biosensing.
This work was supported by the National Science Centre (NCN), Poland, under grant No. 2018/29/B/ST7/02552 and the internal grant of Warsaw University of Technology (Poland) supporting scientific activity in Automatics, Electronics and Electrotechnics received in 2020. M. Janik acknowledges the support from the Foundation for Polish Science within the START 2021 program.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 9.

Tytuł:: Application of the Mach-Zehnder interferometer to measure the quadratic electro-optic effect in nonpolar liquids
Zastosowanie interferometru Macha-Zehndera do pomiarów kwadratowego efektu elektrooptycznego w cieczach niepolarnych
Autorzy:: Ledzion, R.
Górski, P.
Kubiak, K.
Kucharczyk, W.
Tematy:: Mach-Zehnder interferometer
electro-optic effect in liquids
Kerr constant
interferometr Macha-Zehndera
efekt elektrooptyczny w cieczach
stała Kerra; Pokaż więcej
Wydawca:: Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Powiązania:: https://bibliotekanauki.pl/articles/296613.pdf Link otwiera się w nowym oknie
Opis:: A modification of Mach-Zehnder interferometer is proposed. It is shown that by introducing an additional time dependent phase shift in one of the interferometer arms, its sensitivity may be significantly increased. The method is applied to measure the quadratic electrooptic effect in transformer oil.
Zaproponowano metodę pomiaru kwadratowego efektu elektrooptycznego w cieczach przy wykorzystaniu interferometru Macha-Zehndera. Pokazano, że dodatkowa modulacja fazy w jednym z ramion interferometru znacząco zwiększa czułość pomiaru. Metodę zastosowano do pomiaru składowych tensora kwadratowego efektu elektrooptycznego w oleju transformatorowym.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: All-optical parity generator and checker circuit employing semiconductor optical amplifier-based Mach–Zehnder interferometers
Autorzy:: Kaur, S.
Shukla, M. K.
Tematy:: optical computing
semiconductor optical amplifier (SOA)
semiconductor optical amplifier -based Mach–Zehnder interferometer (SOA-MZI)
XOR gate
parity generator
parity checker; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/173209.pdf Link otwiera się w nowym oknie
Opis:: Checking the parity of the data signal during transmission and reception is one way to ensure errorless transmission of data. In this communication the authors propose a method to implement an all-optical parity generator and checker using semiconductor optical amplifier-based Mach–Zehnder interferometers. The scheme, able to process input signals at the same wavelength, is characterized using return-to-zero modulated signals at 10 Gb/s. Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved. Simple structure and potential for integration make this architecture an interesting approach in photonic computing and optical signal processing.
Dostawca treści:: Biblioteka Nauki

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