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Related Concept Videos

Biasing of P-N Junction01:16

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...

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Related Experiment Video

Updated: Jun 3, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Phase sensitive degenerate parametric amplification using directly-bonded PPLN ridge waveguides.

Takeshi Umeki1, Osamu Tadanaga, Atsushi Takada

  • 1NTT Photonics Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan. umeki@aecl.ntt.co.jp

Optics Express
|April 1, 2011
PubMed
Summary

Researchers developed a novel phase-sensitive amplifier using periodically poled lithium niobate waveguides. This device achieved significant in-phase gain and demonstrated stable amplification of modulated signals.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Related Experiment Videos

Last Updated: Jun 3, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

  • Photonics and Optical Engineering
  • Materials Science

Background:

  • Parametric amplifiers are crucial for optical signal processing.
  • Developing efficient and robust waveguide amplifiers remains a challenge.

Purpose of the Study:

  • To construct the first CW pumped degenerate parametric amplifier using periodically poled and ZnO-doped LiNbO3 ridge waveguides.
  • To achieve high gain and demonstrate phase-sensitive amplification.

Main Methods:

  • Utilized periodically poled and ZnO-doped LiNbO3 ridge waveguides.
  • Employed direct bonding and dry etching techniques for waveguide fabrication.
  • Achieved sufficient spatial and temporal overlap between pump and signal beams.

Main Results:

  • Obtained an in-phase gain of +11 dB with high conversion efficiency and damage resistance.
  • Demonstrated nearly identical amplification and deamplification.
  • Achieved a maximum output power of 22 dBm without secondary wavelength conversion.
  • Successfully demonstrated phase-sensitive amplification of a modulated signal.

Conclusions:

  • The developed waveguide amplifier offers high performance and stability.
  • This technology is promising for advanced optical communication and signal processing applications.