Folded-beam design for a Martin-Puplett interferometer with substrate polarizers

Area of Science:

• Optics
• Interferometry
• Polarization optics

Background:

• Polarizing interferometers require specific polarizer orientations for efficient operation.
• Substrate polarizers typically demand p-polarization transmission for maximum efficiency.
• Standard in-plane configurations can present challenges in achieving desired polarization states.

Purpose of the Study:

• To present an out-of-plane configuration for polarizing interferometers.
• To satisfy the 45° rotation requirement between input and beam-splitter polarizers.
• To ensure highest efficiency by maintaining p-polarization transmission.

Main Methods:

• Development of an out-of-plane optical setup.
• Utilizing substrate polarizers.
• Analysis of polarization states and transmission efficiencies.

Main Results:

• The proposed out-of-plane configuration successfully achieves the 45° polarizer rotation.
• Consistent p-polarization transmission is maintained through both polarizers.
• High efficiency is demonstrated, overcoming limitations of conventional designs.

Conclusions:

• The out-of-plane configuration is an effective solution for polarizing interferometers.
• This design enhances efficiency by optimizing polarization management.
• It provides a practical approach for applications requiring precise polarization control.