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Related Experiment Video

Updated: Jun 4, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

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Published on: June 8, 2018

Phase-controlled switching by interference between incoherent fields in a double-Λ system.

Hoonsoo Kang1, Bongjune Kim, Young Ho Park

  • 1Quantum optics Laboratory, Advanced Photonics Research Institute, GIST, Gwangju 500-712, South Korea. hunskang@gist.ac.kr

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

Interference between incoherent lights was demonstrated in a rubidium atomic vapor system. Phase-controlled switching of probe transmission using ultra-weak incoherent fields suggests new optical information delivery methods.

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Area of Science:

  • Atomic physics
  • Quantum optics
  • Laser spectroscopy

Background:

  • Coherent light interference is well-understood.
  • Incoherent light interference is typically negligible.
  • Atomic vapors offer unique light-matter interaction platforms.

Purpose of the Study:

  • To experimentally demonstrate interference between incoherent lights.
  • To investigate phase-controlled switching of probe transmission in a double-Λ system.
  • To explore the potential for optical information delivery using incoherent fields.

Main Methods:

  • Utilizing a double-Λ transition in rubidium atomic vapor.
  • Employing two independent probe lasers with low light intensity.
  • Controlling probe transmission via phase manipulation of incoherent fields.

Main Results:

  • Experimental evidence of interference between incoherent lights was obtained.
  • Probe transmission switching exceeding 70% was achieved.
  • Ultra-weak incoherent fields were sufficient to induce significant switching.

Conclusions:

  • Incoherent light interference is achievable in specific atomic systems.
  • Phase-controlled switching offers a novel mechanism for optical information encoding.
  • The double-Λ system provides a promising platform for exploring incoherent light phenomena.