Broadband and High-Resolution Static Fourier Transform Spectrometer with Bandpass Sampling

Area of Science:

• Spectroscopy
• Optical Engineering
• Signal Processing

Background:

• Fourier transform spectrometers (FTS) are crucial for spectral analysis.
• Traditional FTS face limitations related to the Nyquist sampling rate.
• Wideband spectral recording often requires high resolution, posing a challenge.

Purpose of the Study:

• To experimentally demonstrate a novel static Fourier transform spectrometer (static-FTS).
• To address Nyquist sampling rate limitations in spectral analysis.
• To achieve high-resolution, wideband spectral recording.

Main Methods:

• Developed a static Fourier transform spectrometer (static-FTS).
• Employed a bandpass sampling technique.
• Divided the spectrum into multiple narrowband signals for analysis.

Main Results:

• Successfully demonstrated the static-FTS experimentally.
• The bandpass sampling technique overcame Nyquist sampling rate limitations.
• Achieved high-resolution recording of a wideband spectrum.
• Demonstrated potential resolution better than 2 cm^-1.

Conclusions:

• The proposed static-FTS design is a viable solution for high-resolution spectral analysis.
• This novel approach enables overcoming fundamental sampling limitations.
• The spectrometer shows potential for wide spectral range operation and high resolution.