High-resolution spectrometry with a masked Fabry-Perot interferometer.

Area of Science:

• Optics and Photonics
• Interferometry
• Optical Engineering

Background:

• Real-world Fabry-Perot interferometers suffer performance degradation due to surface irregularities.
• Existing designs are sensitive to imperfections, limiting their practical applications.

Purpose of the Study:

• To propose and theoretically evaluate a new Fabry-Perot interferometer configuration.
• To mitigate the impact of surface irregularities on interferometer performance.
• To enhance key performance metrics such as finesse and contrast.

Main Methods:

• A novel configuration involving appropriate masking of the interferometer plates was designed.
• Theoretical analysis was conducted to predict the performance of the new configuration.
• The impact of nonnormal incidence on the proposed design was also investigated.

Main Results:

• The proposed masking technique theoretically increases finesse by up to a factor of 10.
• Contrast factor is shown to increase by as much as a factor of 100.
• The luminosity-finesse product remains preserved, indicating maintained overall efficiency.

Conclusions:

• The proposed plate masking configuration offers a significant improvement over traditional Fabry-Perot interferometers.
• This method effectively addresses performance limitations caused by surface irregularities.
• The findings suggest a practical approach to enhance optical instrument precision and reliability.