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Minoshima Lab
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The lab explores precise measurement and control by freely manipulating optical frequency combs.
AboutAbout the lab
Research on the optical synthesizer, which manipulates light freely.
The Minoshima Lab studies the “optical synthesizer,” which uses optical frequency combs to manipulate light freely.
An optical frequency comb is called a “ruler of light”: ultra-precise light whose components line up like the teeth of a comb.
The optical synthesizer is a technology that uses the properties of optical frequency combs in time, space, and frequency (color) to play light as if performing music.
The ERATO project of the Japan Science and Technology Agency, led by Prof. Minoshima, was carried out in collaboration with the National Institute of Advanced Industrial Science and Technology, several universities, and private companies.
Key terms
- Optical frequency comb
- Light whose intensity lines up precisely and at equal intervals on the frequency axis, like the teeth of a comb. It is called a “ruler of light.”
- Optical synthesizer
- A technology that uses the properties of optical frequency combs in time, space, and frequency (color) to play light freely, as if performing music.
NewsLab news
A student received a Student Award
A master's student won the OPJ Outstanding Presentation Award at OPJ 2025
A master's student won the Excellent Poster Presentation Award at the 603rd Research Meeting of the Laser Society of Japan
An undergraduate student won the Excellent Presentation Award at the graduation thesis presentation
A paper on circular dichroism measurement by switching coherent circularly polarized light was published in Optical Review
ResearchResearch themes
The Minoshima Lab studies the generation, control, and applications of optical frequency combs and ultrashort pulse lasers. It studies an “intelligent optical synthesizer” that makes full use of the properties of ultrashort pulse lasers and optical frequency combs in time, space, and frequency (color) to manipulate light freely, aiming to realize ultra-precise measurement and control technology for multidimensional information.
*Illustrative imageIntelligent optical synthesizer
In the ERATO project, the lab developed optical frequency combs into an intelligent optical synthesizer by fusing electronics and optical technology. Its research and development aimed to create an intelligent light source that freely manipulates the time, space, frequency, phase, intensity, and polarization of light, and to open up unexplored application fields. The lab will continue to carry on these results and develop them into new fields.
*Illustrative imagePrecision measurement and control based on optical frequency combs
The lab uses optical frequency combs as a precise reference and studies ultra-high-precision measurement and control.
MembersFaculty
The Minoshima Lab consists of faculty, administrative staff, doctoral students, master's students, undergraduate students, visiting faculty, and collaborators.As of 2026
- ProfessorKaoru Minoshima
- Associate ProfessorAkifumi Asahara
- Associate ProfessorMineshi Kato
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: “Femtosecond laser” Mina.ashrafzade / CC BY-SA 4.0 (cropped)
- Intelligent optical synthesizer: “The laser frequency comb in action” ESO / CC BY 3.0 (cropped)
- Precision measurement and control based on optical frequency combs: “Comb Apparatus ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Nayak Kali Prasanna 研究室): “How Atoms Are Defying Gravity in NASA's Cold Atom Lab (SVS31389)” NASA's Scientific Visualization Studio - Global Science and Technology, Inc./Amy Moran / Public domain (cropped)
- Related lab (浅原 彰文 研究室): “Laser frequency comb installed on HARPS” ESO / CC BY 4.0 (cropped)
- Related lab (古川 怜 研究室): “Fiber-optic sensor” Lena.lemon / CC BY-SA 4.0 (cropped)
- Related lab (白川 晃 研究室): “Laser Towards Milky Ways Centre” ESO/Yuri Beletsky (ybialets at eso.org) / CC BY 4.0 (cropped)
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