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関連する概念動画

Passive Filters01:27

Passive Filters

1.0K
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
1.0K
Active Filters01:25

Active Filters

1.4K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.4K
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

21.8K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
21.8K
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

11.0K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
11.0K
Stereoisomerism02:52

Stereoisomerism

14.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
14.1K
Vision01:24

Vision

60.3K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
60.3K

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Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
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第二級光学ブロッキングファブリ・ペローフィルター

Zeyang Li1, Abhishek V Karve1, Xin Wei1

  • 1Department of Applied Physics, Stanford University, Stanford, California 94305, USA.

The Review of scientific instruments
|February 11, 2026
PubMed
まとめ
この要約は機械生成です。

ファブリ・ペロー共振器内の結合偏光モードを使用して、新しい光学フィルターを開発しました。この技術により、通信およびセンシングアプリケーションにおける信号処理の向上のために、より狭帯域幅のフラットトップフィルターが可能になります。

キーワード:
光学フィルターファブリ・ペロー共振器フラットトップフィルター信号処理フォトニクス

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科学分野:

  • * 光学; * フォトニクス; * 信号処理

背景:

  • * フラットトップパスバンドフィルターは、信号処理、検出感度と電力効率の向上に不可欠です。; * 光学フィルターは通常、100 GHzを超えるパスバンド幅を持つ誘電体スタックを使用しており、狭帯域幅アプリケーションを制限します。; * ファブリ・ペロー共振器は、効率的な単一周波数伝送に適した単極共振器ですが、光学ドメインで多極フィルターを構築することは困難です。

研究 の 目的:

  • * 狭いフラットトップパスバンドを持つ第二級ブロッキングタイプの光学フィルターを提案および実装すること。; * 既存の広帯域光学フィルターと、より狭い帯域幅ソリューションの必要性とのギャップを埋めること。; * 光ドメインで狭い帯域幅のフラットトップフィルターを実現する新しい方法を実証すること。

主な方法:

  • * 単一の二重鏡ファブリ・ペロー共振器内に第二級ブロッキングタイプの光学フィルターを実装しました。; * フラットトップ応答を実現するために、2つの偏光モードの結合を利用しました。; * パスバンド幅、ストップバンド抑制、挿入損失を含むフィルターの性能を特徴付けました。

主要な成果:

  • * 2.68(1) GHzの狭いフラットトップパスバンド幅を実証しました。; * 最大43 dBのストップバンド抑制を達成しました。; * パスバンド挿入損失は2.2(1) dBと測定され、帯域外電力抑制はずれの4乗で減少しました。

結論:

  • * 提案された方法により、大幅に狭い帯域幅のフラットトップ光学フィルターを作成できます。; * このアプローチは、レーザー位相ノイズとLIDAR感度の潜在的な改善を提供する、さらに狭いフィルターに拡張可能です。; * 開発されたフィルター技術は、ラマンスペクトル分析などのアプリケーションに高品質の狭帯域フィルタリングを提供します。