One-dimensional linear coherent processing using a single optical element.

Area of Science:

• Optics and photonics
• Signal processing
• Optical engineering

Background:

• Conventional 1-D processors often face limitations such as bulkiness and vignetting.
• The need for efficient and compact optical systems for linear operations is crucial in various applications.

Purpose of the Study:

• To introduce a novel coherent processor capable of executing a wide range of 1-D linear space-variant operations.
• To highlight the advantages of this new processor in terms of compactness and elimination of vignetting.

Main Methods:

• The processor utilizes a 1-D input, a mask with spatially varying transmittance, and an output plane.
• The mask's transmittance is precisely defined to achieve the desired linear operation.

Main Results:

• The processor demonstrated successful implementation of convolution and spectrum scaling operations.
• Experimental validation confirmed the processor's real space compactness.
• The system achieved a total elimination of vignetting, a common issue in other optical processors.

Conclusions:

• The presented coherent processor offers a compact and efficient solution for 1-D linear space-variant operations.
• Its design overcomes key limitations of existing systems, paving the way for advanced optical processing applications.