Analysis of parameter influence law of waveguide Bragg grating

Zheng, Yu; Yue, Jiangtao; Zhang, Pan; Duan, Ji’an

doi:10.1016/j.optlastec.2021.107576

Cited by 6 publications

(4 citation statements)

References 13 publications

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“…For the Yb 3+ single‐doped sample K 2 NaScF 6 : 0.02Yb 3+ , its diffraction peaks shift to a higher degree compared with the K 2 NaScF 6 host. According to Bragg's law, [ 12 ] the reason is that Yb 3+ preferentially replaces the larger Na + ( r = 1.16 Å) or K + ( r = 1.65 Å) site, resulting in lattice shrinkage. For the Yb 3+ , Mn 2+ co‐doped K 2 NaScF 6 :0.02Yb 3+ , x Mn 2+ ( x = 0.01–0.15), the diffraction peaks first shift to a higher degree and then to the opposite direction as the concentration of Mn 2+ ions increases (Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing

Liu,

Zeng,

Wang

et al. 2024

Advanced Optical Materials

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The realization of dual‐wavelength Mn2+ upconversion (UC) luminescence that exhibits different thermal responsive behaviors is promising for non‐invasive optical temperature sensing applications. However, it remains challenging to achieve such luminescence of Mn2+ ions. Herein, due to the site preference characteristics of Mn2+, color tunable and dual‐wavelength Mn2+ UC luminescence is achieved in K2NaScF6:Yb3+, Mn2+ by simply adjusting the Mn2+ doping concentration. Structural and spectral analysis as well as theoretical calculations reveal that the green and red UC emissions originate from two kinds of face‐sharing Yb3+‐Mn2+ dimers, which exhibit different luminescence properties, including different emission wavelength, excited state lifetime, full width at half maximum (FWHM), and luminescence thermal stability. This unique dual‐wavelength UC luminescence of Mn2+ provides a new type of fluorescence intensity ratio thermometer with absolute and relative sensitivities of up to 0.018 K−1 and 0.525% K−1, respectively. This work not only demonstrates the potential application of K2NaScF6:Yb3+, Mn2+ material in the field of optical thermometry but also provides new perspectives for designing multi‐band Mn2+ UC luminescence.

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Section: Resultsmentioning

confidence: 99%

Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing

Liu,

Zeng,

Wang

et al. 2024

Advanced Optical Materials

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“…The internal cavity (gain chip) optimizes the chip structure. The external cavity (Bragg grating and other optical feedback components [93,108,109]) adjust the structure of the existing optical components and design the optical feedback components with a better performance. In general, WBG-ECSLs are a potential approach for laser output with integration, small size, narrow linewidth, wide tuning range, stable spectral output and high side-mode rejection ratio.…”

Section: Discussionmentioning

confidence: 99%

“…In 2022, Zheng et al [93] reported the influence of various factors on the performances of WBG. The results showed that the minimum linewidth of the WBG was 0.1 nm, the maximum SMSR was 13.2 dB, and the maximum reflectance was 99%.…”

Section: Wbg-ecslsmentioning

confidence: 99%

Research Progress of Wide Tunable Bragg Grating External Cavity Semiconductor Lasers

Shi

Wei

et al. 2022

Materials

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In this paper, we review the progress of wide tunable Bragg grating external cavity semiconductor lasers (BG-ECSLs). We concentrate on BG-ECSLs based on the wide tunable range for multicomponent detection. Wide tunable BG-ECSLs have many important applications, such as wavelength-division multiplexing (WDM) systems, coherent optical communications, gas detection and atom cooling. Wide tunability, narrow linewidth and a high side-mode suppression ratio BG-ECSLs have attracted much attention for their merits. In this paper, three main structures for achieving widely tunable, narrow linewidth, high side-mode suppression ratio BG-ECSLs are reviewed and compared in detail, such as the volume Bragg grating (VBG) structure, fiber Bragg grating (FBG) structure and waveguide Bragg grating (WBG) structure of ECSLs. The advantages and disadvantages of different structures of BG-ECSLs are analyzed. The results show that WBG-ECSLs are a potential way to realize the integration, small size, wide tuning range, stable spectral output and high side-mode suppression ratio laser output. Therefore, the use of WBG as optical feedback elements is still the mainstream direction of BG-ECSLs, and BG-ECSLs offer a further new option for multicomponent detection and multi-atoms cooling.

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“…The scattering effects generated by regular and periodic geometries were initially studied in the field of electromagnetism. This concept follows the regime of Bragg's law, such that the band gap frequency (f BG ) depends on the incident angle of the wave (φ), the lattice constant (α), and the sound speed in the medium (c) [4], as summarized in Equation (1).…”

Section: Introductionmentioning

confidence: 99%

2D Sonic Acoustic Barrier Composed of Multiple-Row Cylindrical Scatterers: Analysis with 1:10 Scaled Wooden Models

et al. 2022

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Theory regarding metamaterials was developed in the 1960s, aiming to control the propagation of electromagnetic waves. Under this scope, research has been focused on the realization of materials having specific characteristics to be invisible to the electromagnetic and optics fields. These principles have been expanded only recently to the acoustic sector, with metamaterials capable of controlling the sound propagation due to the interference effect between the soundwaves and the periodic structural elements composing the system. This paper deals with sound attenuation and analyzes a metamaterial acoustic barrier characterized by multiple rows in different configurations. The variety of configurations depends on different diameters of the wooden scatterers (i.e., 9 mm and 15 mm) and the distance between the sound source and the closest edge of the barrier (i.e., 400 mm and 800 mm). Despite having the same height (i.e., 300 mm) of a scaled model, the combination of different diameters in creating an acoustic barrier highlights an increase of the overall Insertion Loss (IL) and a broadened (instead of sharp) sound attenuation of the band gap, captured between 4 kHz and 12.5 kHz.

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Analysis of parameter influence law of waveguide Bragg grating

Cited by 6 publications

References 13 publications

Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing

Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing

Research Progress of Wide Tunable Bragg Grating External Cavity Semiconductor Lasers

2D Sonic Acoustic Barrier Composed of Multiple-Row Cylindrical Scatterers: Analysis with 1:10 Scaled Wooden Models

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Analysis of parameter influence law of waveguide Bragg grating

Cited by 6 publications

References 13 publications

Site Preference Induced Dual‐Wavelength Mn2+ Upconversion in K2NaScF6:Yb3+, Mn2+ and Its Application in Temperature Sensing

Site Preference Induced Dual‐Wavelength Mn2+ Upconversion in K2NaScF6:Yb3+, Mn2+ and Its Application in Temperature Sensing

Research Progress of Wide Tunable Bragg Grating External Cavity Semiconductor Lasers

2D Sonic Acoustic Barrier Composed of Multiple-Row Cylindrical Scatterers: Analysis with 1:10 Scaled Wooden Models

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Product

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Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing

Site Preference Induced Dual‐Wavelength Mn²⁺ Upconversion in K₂NaScF₆:Yb³⁺, Mn²⁺ and Its Application in Temperature Sensing