Self-reference shot-noise-limited phase demodulator with 1530 nm acetylene absorption line

Diaz, Jordan; Степанов, С. И.; Casillas, Nayeli; Ocegueda, Manuel; Hernández, Eduardo; Лебедев, В. В.; Agruzov, P. M.; Shamrai, A.

doi:10.1016/j.rio.2022.100316

Cited by 1 publication

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“…Если такой фазомодулированный сигнал подать на фотодетектор, то на его выходе не будет наблюдаться СВЧ-сигнал, так как биение боковых гармоник с несущей будет компенсировать друг друга. Недавно было предложено использовать ацетиленовую газовую ячейку для демодуляции фазомодулированных сигналов при настройке частоты оптической несущей на склон линии поглощения ацетилена [33]. В данной работе для создания перестраиваемого фильтра частота оптической несущей настраивается вне линии поглощения, а ячейка используется для подавления одной из боковых оптических гармоник на частоте f c -f GC , где f c -частота оптической несущей;…”

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Investigation of a Tunable Microwave Photonic Filter Based on an Acetylene Reference Cell

Tatsenko

Shamray

Stepanov

et al. 2023

Izv. vysš. učebn. zaved. Ross., Radioèlektron.

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Introduction. Recently, the development of tunable microwave photonic filters has attracted great scientific and practical interest. Such microwave photonic filters are a good alternative to traditional electrical solutions, due to low losses, wide operating frequency range and such filters can be easily integrated into various telecommunication systems. By using an acetylene reference cell and a laser with tunable wavelength can make it possible to create tunable microwave photonic filter with wide operating frequency range.Aim. Investigation of the characteristic of a tunable microwave photonic filter based on an acetylene reference cell, as well as research possible solution to reduce losses in filter bandwidth; numerical simulation of microwave photonic filter characteristics.Materials and methods. Experimental study was carried out on an experimental prototype of a tunable microwave photonic filter. The filter consisted of a laser with a tunable wavelength, a phase modulator, an acetylene reference cell, an optical fiber connecting the gas cell with a photodetector, and a photodetector. Theoretical study was carried out by modeling of the transmission characteristics of the microwave photonic filter.Results. Experimental transmission characteristics of a tunable microwave photonic filter were obtained. The tuning of the filter bandwidth by tuning laser wavelength was studied. Modeling of transmission characteristics of microwave photonic filter was performed. Possible solution to reduce losses in filter bandwidth was proposed.Conclusion. A tunable microwave photonic filter based on an acetylene reference cell is proposed. Losses in the filter bandwidth was about −30 dB. Using high-power laser and a photodetector with a high photocurrent can reduce losses in the filter bandwidth.

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