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Katsuragawa Lab
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The lab develops wavelength-tunable lasers and laser systems for measuring metal atoms 100 km above the ground.
AboutAbout the lab
Aiming for harmony between cutting-edge technology and nature.
The Katsuragawa-Oae Lab conducts laser experiments in East Building 6 and researches the development of short-wavelength, wavelength-tunable laser light.
The lab has demonstrated that the process by which laser light is generated can be artificially manipulated and controlled, and it applies this technology to laser development.
Another pillar of its work is the development of a high-power, high-intensity laser system for measuring metal atoms and ions in the mesopause, about 100 km above the ground.
For students who wish to join the lab, the goal is to help them develop the ability to think things through for themselves.
Key terms
- Vacuum ultraviolet region
- The range of light with wavelengths of 100–200 nm
- Laser cooling
- A technique that uses laser light to create extremely low-temperature conditions
- Mesopause
- A region about 100 km above the ground that connects space and the Earth's atmosphere
ResearchResearch themes
The Katsuragawa-Oae Lab works on developing short-wavelength, wavelength-tunable laser light and a laser system for measuring metal atoms and ions in the mesopause, 100 km above the ground. It is also looking toward laser cooling, a technique that uses vacuum ultraviolet laser light with wavelengths of 100–200 nm to create extremely low-temperature conditions.
*Illustrative imageTunable Extremely Short-Wavelength Lasers
Laser light that has an extremely short wavelength and can also be tuned in color (wavelength) is difficult to produce, and its development has not advanced. The lab has demonstrated that the process by which laser light is generated can be artificially manipulated and controlled, and it applies this technology to laser development.
*Illustrative imageLidar for Measuring Atoms and Ions in the Mesopause
The mesopause, 100 km above the ground, is a region considered too high for direct measurement. Focusing on the metal atoms and ions present there, the lab is developing a high-power, high-intensity laser system to measure their density and distance.
MembersFaculty
The members of the Katsuragawa-Oae Lab consist of faculty, a secretary, and doctoral and master's students.As of 2026
- ProfessorMasayuki Katsuragawa
- Associate ProfessorChiaki Oae
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: “Starfire Optical Range - sodium laser” 作者不詳 / Public domain (cropped)
- Tunable Extremely Short-Wavelength Lasers: “Excimer laser 1” IoOALP / CC BY-SA 4.0 (cropped)
- Lidar for Measuring Atoms and Ions in the Mesopause: “Circles Upon Circles Above Gemini South (iotw2534a)” International Gemini Observatory/NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava) / CC BY 4.0 (cropped)
- Related lab (平田 修造 研究室): “Fluorescent dye” Swastipandey / CC BY-SA 4.0 (cropped)
- Related lab (武者 満 研究室): “Baffled LIGO Scientists” Nkij / CC BY 4.0 (cropped)
- Related lab (松林 和幸 研究室): “MAXIMATOR-High-Pressure-Manometer-01a” CEphoto, Uwe Aranas / CC BY-SA 3.0 (cropped)
- Related lab (森下 亨 研究室): “LASER BEAM APPARATUS IN CHEMICAL LABORATORY CHEM LAB - NARA - 17421758” Martin Brown / Public domain (cropped)
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