High-power tunable sub-nm narrowband near-diffraction-limited superfluorescent fiber source based on a single-lens spectral filter

Gao, Wei; Wang, Fan; Zhang, Yanpeng; Ju, Pei; Zhao, Baoyin; Wu, Peng; Li, Gang; Gao, Qi; Li, Zhe

doi:10.1016/j.optcom.2020.125359

Cited by 5 publications

(1 citation statement)

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“…In the actual production process of grating, production deviations are inevitable [35][36][37][38][39]. In our work, in order to understand multi-channel optics deeply, grating profile parameters need to be analyzed.…”

Section: Investigation Of Manufacturing Tolerance For Nine-channel Be...mentioning

confidence: 99%

Compact silica-based equal nine-channel generated by triple-layer arrays

Fang

Wang

2021

Phys. Scr.

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In order to achieve the demands of multi-beam splitting in the optical communication system, a compact high-efficiency silica-based nine-channel beam splitter grating (BSG) at infrared wavelength is proposed based on a three-layer array structure. The grating profile parameters are investigated by the rigorous coupled-wave analysis (RCWA) and the finite-element method (FEM). The total efficiency of the nine-channel beam splitter reaches 96.98%, and the error of uniformity is reduced to 2.98%. The results show that the theoretical values of the two optimization methods are in good agreement. Moreover, the presented grating has a good performance against fabrication tolerances. The modal method is used for detailed physical explanation of the energy exchange and propagation modes inside the grating. The proposed high-efficiency nine-channel beam separation by three-layer arrays should be helpful for developing the multi-beam splitting of the optical system of the lithography machine and the new ultra-precision optical devices.

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