Simulative study on speckle-spectral properties of a random pixelated grating

Area of Science:

• Optics and Photonics
• Spectroscopy
• Nanotechnology

Background:

• Speckle spectrometers utilizing disordered media are gaining attention for their potential.
• Existing designs face challenges in bandwidth and light-energy utilization.

Purpose of the Study:

• To propose a novel speckle spectrometer scheme with enhanced performance.
• To improve bandwidth and light-energy utilization ratio using a random pixelated grating.

Main Methods:

• Derivation of the speckle generation mechanism for the random pixelated grating.
• Analysis of speckle-spectral correlation properties via numerical simulation.
• Investigation of system parameter influences (grating periods, orientations, lens focal length, pixel size, pixel number).

Main Results:

• Successful derivation and analysis of the speckle generation and correlation properties.
• Identification of optimal system parameters through comprehensive simulations.
• Demonstration of a speckle spectrometer system with a spectral resolution up to 0.01 nm.

Conclusions:

• The proposed random pixelated grating speckle spectrometer scheme is effective.
• The optimized system achieves high spectral resolution and improved light-energy utilization.
• This advancement holds promise for next-generation optical sensing applications.