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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

A broadband picometer resolution visible CCD spectrometer based on virtually imaged phased array technology.

Hao Zhou^1,2, Weixiong Zhao¹, Bo Fang¹

¹Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, Anhui, China. wxzhao@aiofm.ac.cn.

|August 8, 2023

Summary

This summary is machine-generated.

We developed a high-resolution visible spectrometer using the virtually imaged phase array (VIPA) technique. This system achieves broadband spectral coverage and high resolution, ideal for spectroscopy and trace detection.

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Area of Science:

Spectroscopy
Optical Engineering
Photonics

Background:

Achieving both broadband spectral coverage and high resolution in spectrometers is a significant challenge.
Existing spectrometer designs often face limitations in simultaneously meeting these requirements.

Purpose of the Study:

To develop a high-resolution visible spectrometer utilizing the virtually imaged phase array (VIPA) technique.
To achieve broadband spectral coverage and high resolution within a single, simple spectrometer system.

Main Methods:

Employed the virtually imaged phase array (VIPA) technique with a thin glass plate and reflective grating for two-dimensional cross-dispersion.
Investigated the impact of VIPA etalon surface quality, CCD pixel size, input beam pinhole size, and imaging lens focal length on spectrometer resolution and spot size.
Validated simulation accuracy by comparing experimental results with theoretical calculations.

Main Results:

Achieved broadband spectral coverage of approximately 14.94 THz.
Obtained a high resolution of approximately 1 GHz at 632.996 nm.
Demonstrated a simple spectrometer structure with effective two-dimensional cross-dispersion.

Conclusions:

The developed VIPA spectrometer successfully integrates broadband coverage and high resolution.
The study provides valuable insights into simulating and constructing VIPA spectrometers.
The instrument serves as a powerful tool for high-resolution spectroscopy and simultaneous multi-species trace detection.