Spatial–Spectral Correspondence Relationship for Mono–Polychromatic Light Diffraction

Han, Pin

doi:10.1016/bs.po.2017.10.002

Cited by 5 publications

(5 citation statements)

References 94 publications

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“…In the last section, we present a scheme for obtaining the refractive index by finding the ellipticity of the polarization. Here, we would like to show how to use this feature to obtain the dispersion of the material by employing a polychromatic source [18]. It is known that material dispersion is a property such that the refractive index depends on the wavelength of the incident light wave, i.e., the refractive index n is actually a function of wavelength λ , written as ( ) n λ from now on.…”

Section: Dispersion Measurement With Polychromatic Lightmentioning

confidence: 99%

Refractive Index and Dispersion Measurement Principle with Polarization Change in Total Internal Reflection

Chang,

Tsai,

Weng

et al. 2024

Photonics

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Refractive index measurements have been an important task for a long time because that index plays an essential role in describing the optical properties of a material. Many methods have been developed to perform that task. Some of them use interferometry to achieve high precision. However, these configurations are complicated. Some measure the critical angle using simple structures, but their accuracy is unsatisfactory because it is difficult to judge the exact critical angle with intensity variations. Here, we propose several new schemes based on measuring the polarization change in the total internal reflection. The proposed method has the merits of simple structure and easy incident angle determination that gives the maximum phase change. Additionally, it is possible to find the material dispersion by measuring the wavelength dependence of the polarization ellipticity. Some useful formulas relating the refractive index to the maximum phase change are obtained. This work can provide valuable alternatives for refractive index measurement.

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Section: Dispersion Measurement With Polychromatic Lightmentioning

confidence: 99%

Refractive Index and Dispersion Measurement Principle with Polarization Change in Total Internal Reflection

Chang,

Tsai,

Weng

et al. 2024

Photonics

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“…This states that spectral variations occur unless the degree of spectral coherence of the sources meets that law [2]. There were many valuable results, such as singular optics in polychromatic light [3,4] and spatial and spectral correspondence relationships [5]. Some applications were proposed, such as spectra manipulation [6], spectral switches [7,8], and Talbot spectra [9].…”

Section: Introductionmentioning

confidence: 99%

Scalable Optical Frequency Rulers with the Faraday Effect

Chang,

Tsai,

Ding

et al. 2024

Photonics

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Optical frequency rulers (OFRs) can be used as optical wavelengths or frequency references for spectra modulation or to determine unknown wavelengths. In the past, difficult-to-perform and complicated mechanisms were used to make OFRs, such as double slits with a high-speed fluid or an external circuit to control the liquid crystal birefringence. Since then, a later research study introduced a simple structure for producing OFRs by utilizing the optical activity block and two polarizers. This achieved a movable OFR that was controllable by simply rotating one of the polarizers. However, this mechanical rotation hindered its high-speed applicability. In this article, a more advanced, scalable OFR scheme using the Faraday effect is proposed. It is controlled by varying the magnetic field intensity, which is not a mechanical method, and it can be changed at high speeds. The numerical results demonstrate that those OFR spectral ticks can be scaled to reach a higher or lower tick density, greatly benefiting the wavelength decision jobs.

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“…A notable view called the spatial-spectral correspondence relationship for monopolychromatic light was proposed by Han [17], stating that for uniform incident light, the modulated monochromatic light intensity effects can be transferred into those of the corresponding polychromatic spectrum. It turns out that many of the above-mentioned results are based on this correspondence principle, although it was given a formal name later.…”

Section: Introductionmentioning

confidence: 99%

A Data Transmission Method with Spectral Switches via Electroabsorption

et al. 2022

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In the past, the waveguide electroabsorption effect has generally been used as an intensity modulator for quasi-monochromatic light, such as lasers. Here, we study how this effect affects polychromatic light spectra. We find that for light with a Gaussian distribution spectrum, the spectral peak shift (red shift or blue shift) can be controlled by the magnitude of the applied voltage, as long as the center wavelength and the spectral band are properly selected. This result can be used as a data transmission scheme at the integrated chip level or in free space. It may offer a good option for some other light sources, such as low-cost LED or ELED (edge emitting LED), with wider spectral bandwidths.

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Spatial–Spectral Correspondence Relationship for Mono–Polychromatic Light Diffraction

Cited by 5 publications

References 94 publications

Refractive Index and Dispersion Measurement Principle with Polarization Change in Total Internal Reflection

Refractive Index and Dispersion Measurement Principle with Polarization Change in Total Internal Reflection

Scalable Optical Frequency Rulers with the Faraday Effect

A Data Transmission Method with Spectral Switches via Electroabsorption

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