The Multichannel Optical Spectrometer for Diagnostics of the Liquid Propellant Rocket Engine

Ваганов, М. А.; Kazakov, V. I.

doi:10.1109/weconf.2019.8840114

Cited by 3 publications

References 4 publications

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Multi‐Object Silicon Photonic Spectrometer

Ding,

Zhang,

Liu

et al. 2024

Laser & Photonics Reviews

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A multi‐object silicon photonic spectrometer with N input ports is proposed and realized by integrating a multi‐channel passband optical filter (POF), a tunable narrow‐band optical filter as well as a calibration‐free N × 1 Mach–Zehnder switch (MZS) array. Here, the multi‐channel POF consisting of a multimode waveguide grating (MWG) and a mode (de)multiplexer is used to achieve a broadened working window and an enhanced dynamic range for the present spectrometer, while the narrow‐band optical filter is realized with a thermally‐tunable Euler micro‐ring resonator (EMR) for achieving a very high spectral resolution. The introduction of the N × 1 MZS enables the time‐division‐multiplexed (TDM) spectrum analysis for multiple objects. In this paper, a multi‐object silicon photonic spectrometer with 16 input ports is demonstrated with an on‐chip loss of less than 3 dB and inter‐channel crosstalk as low as −25 dB. This multi‐object spectrometer can be used to analyze the spectra of 16 objects one by one by setting the 16 × 1 MZS, the resolution is as high as 50 pm, and the working window is ≈84 nm.

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Multi‐Object Silicon Photonic Spectrometer

Ding,

Zhang,

Liu

et al. 2024

Laser & Photonics Reviews

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The study of variations in refractive indices of ZnSe single crystals in the range of 1.5-27 microns

Kotlikov

Novikova

Tereshchenko

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The study of using new materials for the production of optical sensors, synthetic vision systems, and modern glasses with specified frequency polarization properties is impossible without their experimental research. Such research is focused on the further solution for the problems of synthesis or optimization of the technological process using accurate data on the parameters of a specific sample of production optical material. Here are the results of measurements and algorithms for processing the data obtained in order to estimate the refractive index of zinc selenide single crystals of the same ZnSe CVD type from different batches. A method for determining the refractive index is developed based on the spectrophotometric method using the reflection and transmittance spectra of plates, as well as the spectrum of the reflection from the sample surface. The results of the study showed not only the correctness of the proposed method. They also showed that in the studied part of the infrared range, the obtained refractive indices for different samples of zinc selenide from the same batch differ more from each other than indicated in reference publications. It should be taken into account when developing products of transmittance optics.

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