Apodized long period grating and sensitivity analysis of high order resonant wavelengths for temperature measurement

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-02-14 DOI:10.1007/s00340-025-08409-y

Himadri Nirjhar Mandal, Soumya Sidhishwari

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Abstract

An apodized Long Period Grating (LPG) is presented to compute and depict the temperature sensitivity for different resonant wavelengths in the transmission spectrum. The spectrum often gets distorted due to overlapping of multiple modes and appearance of large quantity side lobes as a result of the impacts of higher order period. Therefore, the introduction of apodization profile is necessary to obtain the proper shape of the spectrum by preventing any distortions. It has been noted that the higher order mode (LP₀₇) shows greater temperature sensitivity with 0.043 nm/^o C as compared with the lower order modes (i.e., LP₀₄, LP₀₅, LP₀₆) for 100–600° C. Different Machine Learning models are implemented for the predictive analysis of resonant wavelength changes in accordance with the temperature effects for enhancing the effectiveness of the sensor response. This approach is highly desirable in various applications by ensuring the safety, efficiency and reliability of the LPG-based sensing outcomes.

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温度测量用长周期光栅及高阶谐振波长灵敏度分析

提出了一种改进的长周期光栅，用于计算和描述透射光谱中不同谐振波长的温度灵敏度。在高阶周期的影响下，由于多模态的重叠和大量侧瓣的出现，导致频谱失真。因此，为了获得正确的光谱形状，防止任何畸变，引入离化剖面是必要的。已经注意到，在100-600°C范围内，与低阶模式（即LP04、LP05、LP06）相比，高阶模式（LP07）在0.043 nm/o C的温度下表现出更高的温度灵敏度。为了提高传感器响应的有效性，采用了不同的机器学习模型来根据温度效应预测分析谐振波长的变化。通过确保基于lpg的传感结果的安全性、效率和可靠性，该方法在各种应用中都是非常理想的。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.