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Ohae Lab
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The lab develops new lasers by manipulating nonlinear optical processes.
AboutAbout the lab
Controlling the phase of light to create new lasers
The Ohae Lab researches creating new laser light sources by freely manipulating nonlinear optical processes.
Using a method that manipulates nonlinear optical processes by controlling the phase relationship of light, the lab aims to obtain single-frequency laser light at any wavelength from the mid-infrared to the vacuum ultraviolet.
Using vacuum ultraviolet laser light, the lab is also working on laser cooling of hydrogen and antihydrogen atoms.
The lab is also attempting to control electric current at ultrafast speed by controlling the waveform of light to the extreme.
Key terms
- Nonlinear optical processes
- Processes that depend strongly on the phase relationship of light. The speed and direction in which the process proceeds are determined by the value and sign of the phase relationship
- Antihydrogen atoms
- The antimatter counterpart of the hydrogen atom. It is the only "antiatom" humans can currently produce, and it is used as a testing ground for the Standard Model
- Laser cooling
- A method that uses laser light to bring hydrogen and antihydrogen atoms to rest relative to the Earth
- Function generator
- A device that generates arbitrary periodic signals. It is used in many fields
ResearchResearch themes
The lab has demonstrated that its method of freely manipulating nonlinear optical processes by controlling the phase relationship of light actually works effectively. Its research themes are the development of new laser light sources, laser cooling of hydrogen and antihydrogen atoms, and ultrafast control of electric current through extreme control of light waves.
*Illustrative imageDevelopment of New Laser Light Sources
By controlling the phase relationship of nonlinear optical processes, the lab aims to obtain single-frequency laser light at any wavelength from the mid-infrared to the vacuum ultraviolet, using a higher-order Raman resonant four-wave mixing process in parahydrogen.
*Illustrative imageLaser Cooling of Hydrogen and Antihydrogen Atoms
To test whether hydrogen and antihydrogen atoms behave symmetrically under gravity, the lab aims to bring the atoms almost completely to rest with a 121 nm vacuum ultraviolet laser, let them fall freely, and verify the symmetry with high precision.
*Illustrative imageUltrafast Current Control through Control of Light Waves
The lab has realized a function generator in the optical frequency range above 100 THz. Using the waveform of this optical electric field, it is working on controlling the tunneling current flowing between materials at ultrafast speed.
MembersFaculty
The Ohae Lab's members consist of faculty, master's students, and undergraduate students.
- Associate ProfessorChiaki Ohae
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Nonlinear Processes” Benjamin Cromey / Public domain (cropped)
- Development of New Laser Light Sources: “Scientist measures the optical limiting performance of a nonlinear material - ALC” Adelphi Lab Center Douglas G. LaFon / CC BY 2.0 (cropped)
- Laser Cooling of Hydrogen and Antihydrogen Atoms: “AEgIS antihydrogen production trap” Brice, Maximilien; Ordan, Julien Marius / CC BY 4.0 (cropped)
- Ultrafast Current Control through Control of Light Waves: “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Related lab (Iwakuni Lab): “Bunsen spectrometer (Newth 1902)” Valerio Giuso / Public domain (cropped)
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- Related lab (Katsuragawa Lab): “Starfire Optical Range - sodium laser” 作者不詳 / Public domain (cropped)
- Related lab (Musha Lab): “Baffled LIGO Scientists” Nkij / CC BY 4.0 (cropped)
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