Solid-block stationary Fourier-transform spectrometer.

Area of Science:

• Spectroscopy
• Optical instrumentation
• Fourier-transform spectroscopy

Background:

• Traditional Fourier-transform spectrometers can be sensitive to environmental perturbations.
• There is a need for rugged, portable spectrometers for field measurements.
• Moderate-resolution spectroscopy is crucial for detecting time-varying signatures.

Purpose of the Study:

• To describe a novel solid-block stationary Fourier-transform spectrometer (SBSFTS).
• To highlight the SBSFTS's suitability for portable, moderate-resolution applications.
• To demonstrate its capability in detecting temporally variant signatures.

Main Methods:

• Development of a solid-block stationary Fourier-transform spectrometer (SBSFTS).
• Utilizing a source-doubling, square-and-triangle common-path topology.
• Integration with a fiber-optic input for compact form factor.

Main Results:

• The SBSFTS is demonstrated to be low-cost and extremely rugged.
• The spectrometer exhibits exceptional alignment stability, immune to perturbations.
• Experimental results confirm the design's feasibility and performance.
• Compact form factor achieved when coupled with fiber optics.

Conclusions:

• The SBSFTS is a viable, robust, and cost-effective instrument for moderate-resolution spectroscopy.
• Its design is well-suited for portable applications and harsh operating environments.
• The spectrometer effectively detects temporally variant signatures.