Dual Tunable MZIs Stationary-Wave Integrated Fourier Transform Spectrum Detection

Sensors

Xinyang Chen¹  Yong Zhu¹  Jie Zhang¹  Peijian Huang¹  Ning Wang¹ 

[1] The Key Laboratory of Optoelectronic Technology & System, Education Ministry of China, Chongqing University, Chongqing 400044, China;

关键词: DTM-SWIFT;    optical distribution characteristics;    high spectral resolution;    Raman spectrum;   

DOI  :  10.3390/s21072352

来源: DOAJ

【 摘 要 】

In order to resolve spectral alias due to under sampling in traditional stationary-wave integrated Fourier transform (SWIFT) spectrometers, an all-on-chip waveguide based on dual tunable Mach-Zehnder interferometer (MZI) stationary-wave integrated Fourier transform technology (DTM-SWIFT) is proposed. Several gold nanowires are asymmetrically positioned at two sides of zero optical path difference and scatter the interference fringes information, which can avoid aliasing of spectral signals and help to gain high spectral resolution. A systematic theoretical analysis is carried on in detail, including the optical distribution characteristics based on multi-beam interference, stationary-wave theorem and signal reconstruction method based on the FT technology. The results show that the method can complete a resolution of 6 nm for Gauss spectrum reconstruction using only 6 gold nanowires, and a resolution of 5 cm⁻¹ for Raman spectrum reconstruction using 25 gold nanowires.

【 授权许可】

Unknown