arXiv subjects

Muqian Wen

Publications and source records attributed to Muqian Wen.

4 recordsLinked to original sources

arXiv2023

Impact of mechanical disturbances to the placement of reference light in Fourier transform interferometers

Fourier transform interferometers usually need a dedicated reference light to precisely track optical path difference changes. There are a few different ways to incorporate the reference light into the optical system. This paper conducted experiments to give a test of how different ways of incorporating reference light are affected by mechanical disturbances. It found that placing the reference light in different path than the test light can be very sensitive to mechanical disturbance errors while propagating the reference light together with the test light can be very robust against mechanical vibrations of optical components.

physics.ins-det↗

arXiv2022

Application of non-uniform Fourier transform to non-uniform sampling Fourier transform spectrometers

Resampling by interpolation is the traditional method to process interferograms from non-uniformly sampled Fourier transform spectrometers. The non-uniform fast Fourier transform (NUFFT) is an alternative approach that has been mostly overlooked. With the aid of experiments on a high-resolution interferometer with a variety of optical sources, these two methods are compared. It is found that the NUFFT is comparable to interpolation in spectral profile shape and spectral noise levels and is better in spectral amplitude and computer performance. A significant advantage is also found in the case of under-sampling and noise performance by NUFFT due to the unique non-periodic nature of non-uniform sampling. In addition, a novel implementation of NUFFT is presented and analysed.

physics.ins-det↗

arXiv2020

Birefringence effect in Raman scattering of anisotropic materials

This paper adds birefringence consideration to the conventional classical Raman scattering theory commonly found in literature to address birefringence and interference effects in Raman spectroscopy. It is hoped that the new results can be useful for ab initio calculations as well as experimental studies.

physics.optics↗

arXiv2020

A simple practical quantum bit commitment protocol

This paper devises a simple quantum bit commitment protocol that is just as easy to implement as any existing practical quantum bit commitment protocols but will be more secure. It will be infinitely close to being unconditionally fully secure although neither perfectly binding nor perfectly concealing.

quant-ph↗