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Related Experiment Video

Updated: May 8, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Parametric four-wave mixing using a single cw laser.

E Brekke1, L Alderson

  • 1Department of Physics, St. Norbert College, De Pere, Wisconsin 54115, USA. erik.brekke@snc.edu

Optics Letters
|August 14, 2013
PubMed
Summary
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Researchers generated coherent 420 nm light using four-wave mixing with a diode laser and tapered amplifier. This method produces specific frequencies, but output power is limited by absorption, with potential for improvement.

Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Nonlinear Optics
  • Laser Spectroscopy

Background:

  • Four-wave mixing (FWM) is a nonlinear optical process enabling the generation of coherent light at new frequencies.
  • Commercial lasers often lack the capability to produce specific, narrow-frequency outputs required for advanced applications.
  • Parametric FWM offers a pathway to generate coherent light at frequencies not readily available from standard laser sources.

Purpose of the Study:

  • To demonstrate the generation of high-power, coherent continuous-wave (cw) light at 420 nm using parametric four-wave mixing.
  • To investigate the influence of input beam characteristics and atomic density on the FWM process.
  • To identify limitations and suggest improvements for the efficiency of the generated 420 nm beam.

Main Methods:

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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

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Related Experiment Videos

Last Updated: May 8, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
10:42

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

  • A single narrow external cavity diode laser was locked to the two-photon 5s-5d transition in rubidium.
  • The diode laser output was amplified using a tapered amplifier system to produce a high-power cw beam at 778 nm.
  • Parametric four-wave mixing was employed using the amplified 778 nm beam to generate coherent light at 420 nm.

Main Results:

  • A high-power cw beam at 778 nm was successfully generated.
  • Coherent light at 420 nm was produced via parametric four-wave mixing.
  • The efficiency of the 420 nm generation was analyzed concerning input beam intensity, frequency, and rubidium atomic density.

Conclusions:

  • The study successfully generated coherent 420 nm light through a diode laser-amplified system and FWM.
  • On-resonance absorption of the 420 nm beam currently limits the process efficiency.
  • Modifications to the experimental setup are expected to significantly enhance the output power of the generated coherent light.