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A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

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Static FT imaging spectrometer based on a modified waveguide MZI array.

Minyue Yang, Mingyu Li, Jian-Jun He

|July 15, 2017

Summary

This summary is machine-generated.

We developed a compact Fourier transform (FT) imaging spectrometer on a silicon-on-insulator platform. This device offers high spectral resolution for remote sensing applications, integrating optics and spectroscopy onto a single chip.

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Area of Science:

Photonics
Spectroscopy
Remote Sensing

Background:

Hyperspectral imaging requires sophisticated spectroscopic systems.
Miniaturization is crucial for portable remote sensing instruments.
Fourier transform (FT) spectroscopy offers high spectral resolution.

Purpose of the Study:

To propose a novel large aperture push-broom static FT imaging spectrometer.
To demonstrate an on-chip FT spectrometer for hyperspectral imaging.
To provide a compact solution for high spectral resolution remote sensing.

Main Methods:

Utilized a silicon-on-insulator (SOI) platform.
Integrated spot size converters, a Mach-Zehnder interferometer (MZI) array, and a detector array.
Employed linearly varied arm length differences in 201 MZI arrays.

Main Results:

Achieved operation across a broad spectral range (1100–1700 nm).
Obtained a spectral resolution of 24 cm⁻¹.
Designed a compact chip with dimensions of 11 mm × 15 mm.

Conclusions:

The waveguide-MZI-based FT spectrometer offers a compact solution.
Enables high spectral resolution remote sensing.
Suitable for integration into both fore-optic lenses and spectroscopic systems.