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関連する概念動画

Electro-mechanical Systems01:19

Electro-mechanical Systems

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Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
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Voltage01:13

Voltage

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The movement of electrons in a conductor requires some form of energy or work, usually provided by an external force, like a battery. This force is called the electromotive force or voltage. The voltage between two points, referred to as points "a" and "b," in an electric circuit is the energy (or work) needed to move a unit charge from point "a" to point "b," and this relationship is expressed mathematically as
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Multiple Voltage Sources01:25

Multiple Voltage Sources

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Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel.
In series, the positive terminal of one battery is connected to the negative terminal of another battery. Hence, the voltage of each battery is added to give the net voltage, which is increased because each battery boosts the electrons that enter it. The same current flows through each battery because they are connected in series.
Batteries are...
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Voltage Dividers01:14

Voltage Dividers

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In electrical circuits, resistors can be connected in series, sequentially linked one after the other. In a series configuration, the same current flows through each resistor. Ohm's law is a fundamental principle to understand the behavior of resistors in series. It expresses the voltage across these resistors in terms of the current and resistance.
Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the current...
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Three-Phase Voltages01:30

Three-Phase Voltages

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A three-phase generator produces three voltages that are equal in magnitude but have a phase difference of 120 degrees. This identical magnitude and equal phase separated voltages are known as the balanced voltages and help to minimize power loss while ensuring a steady delivery of energy to connected loads. As voltage sources in a three-phase system can be configured in a wye or a delta formation, the loads connected to these systems can also be arranged in either configuration. This...
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Operational Amplifiers01:17

Operational Amplifiers

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The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
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CMOS対応の電圧で動作する集積リチウムニオバート電光調節器

Cheng Wang1,2, Mian Zhang1, Xi Chen3

  • 1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.

Nature
|September 26, 2018
PubMed
まとめ

研究者は,チップスケールでCMOS互換性のある新しいリチウムニオバート電光調節器を開発し,低光学損失で210 Gbpsの速度を達成しました. これらの進歩は 次世代の電気通信や 量子フォトニクスにとって 極めて重要です

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科学分野:

  • 光学について
  • 材料科学
  • 電気工学

背景:

  • 電気光学調節器は,電気通信とマイクロ波光学システムにとって不可欠です.
  • 既存のチップスケールモデュレータは,CMOSの互換性,高帯域幅,低損失の要件を満たすのに苦労しています.
  • リチウムニオバートの調節器は優れた電気光学特性を有しますが,チップに統合することは困難です.

研究 の 目的:

  • モノリティカルに統合されたリチウムニオバート電光調節器を開発する.
  • CMOS対応のドライブ電圧,超高帯域幅,そして非常に低い光学損失を同時に達成する.
  • 先進的なフォトニックアプリケーションのための低コスト,低電力,超高速ソリューションを可能にします.

主な方法:

  • 高い電気光学効率のためのマイクロ波と光学回路の設計.
  • グループ速度のマッチングと超低光学損失を同時に達成する.
  • チップ上のリチウムニオバートの単体統合を証明する.

主要な成果:

  • チップスケールのリチウムニオバート電光調節器を実証した.
  • CMOS対応のドライブ電圧を達成した.
  • サポートされるデータレートは最大210ギガビット/秒.
  • チップ上の光学損失は0.5デシベル未満である.

結論:

  • 開発されたモジュレータは,既存の統合プラットフォームの限界を克服します.
  • 拡張可能なモジュール装置は,次世代光学ネットワークとマイクロ波フォトニクスの有望なソリューションを提供します.
  • このアプローチは,量子と古典的なアプリケーションのための大規模な,超低損失の光子回路を可能にします.