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Related Concept Videos

MOSFET Amplifiers01:17

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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Related Experiment Video

Updated: Jun 4, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Broadband linearized silicon modulator.

Anatol Khilo1, Cheryl M Sorace, Franz X Kärtner

  • 1Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. anatolykhilo@gmail.com

Optics Express
|March 4, 2011
PubMed
Summary
This summary is machine-generated.

A novel silicon Mach-Zehnder modulator achieves wideband linearization by canceling nonlinearities. This design offers superior linearity for analog photonic applications, surpassing conventional modulators.

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Area of Science:

  • Photonics
  • Semiconductor Devices
  • Optical Modulators

Background:

  • Silicon photonics offers a scalable platform for optical modulators.
  • Nonlinearity in Mach-Zehnder modulators limits performance in analog applications.
  • Achieving wideband linearization is crucial for high-fidelity signal transmission.

Purpose of the Study:

  • To propose and theoretically demonstrate a wideband linearized silicon Mach-Zehnder (MZ) modulator.
  • To eliminate third-order nonlinearity by canceling inherent nonlinearities.
  • To simultaneously suppress second-order nonlinearity for enhanced linearity.

Main Methods:

  • Utilizing a single MZ interferometer with identical reverse-biased silicon diode phase shifters.
  • Implementing a push-pull configuration for driving the phase shifters.
  • Employing differential detection or operation away from the quadrature point to eliminate second-order nonlinearity.

Main Results:

  • Successful elimination of third-order nonlinearity through cancellation of silicon phase shifter and MZ transfer function nonlinearities.
  • Simultaneous suppression of second-order nonlinearity.
  • Demonstrated linearity significantly exceeding conventional MZ modulators, including those with linear phase shifters like LiNbO3.

Conclusions:

  • The proposed silicon MZ modulator achieves exceptional linearity through a unique cancellation scheme.
  • Its simplicity, wide optical and RF bandwidth, and high linearity make it highly suitable for analog photonic systems.
  • This advancement paves the way for more robust and high-performance analog photonic applications.