LAB LOGA page on LabLog, a review site (not the lab's official page)
Matsukuma Lab
Machine-translated · View original
The lab studies optical measurement, using femtosecond lasers to measure angle and position.
AboutAbout the lab
Turning state-of-the-art lasers into a measuring scale.
The Matsukuma Lab uses state-of-the-art lasers to study ultra-precision measurement of the motion and shape of objects.
At the center are the mode-locked femtosecond laser and its frequency spectrum, the optical frequency comb.
An optical comb can have its frequency stabilized by synchronizing it with an external frequency standard, and it is characterized by a wide wavelength range and high directionality.
The lab uses it as the light source for angle sensors and encoders and studies its application to measurement.
Key terms
- Femtosecond laser
- A laser that emits pulses of light lasting only an extremely short time, one quadrillionth of a second
- Optical frequency comb
- Light that appears, when the light of a femtosecond laser is viewed in terms of frequency, as evenly spaced lines like the teeth of a comb
- Autocollimator
- A device that shines a laser on the object being measured and measures its tilt from the light that returns
ResearchResearch themes
In industry, optical elements and semiconductor devices are becoming ever finer, and the need to machine and measure objects with nanometer accuracy is growing. Angle in particular is an essential quantity in manufacturing, and the lab proposes and verifies new measurement methods that use a mode-locked femtosecond laser as the light source.
*Illustrative imageAbsolute Encoder Using a Femtosecond Laser
The lab develops an encoder that measures the absolute position and displacement of a stage with ultra-high precision. It aims to realize an absolute-type encoder, which knows the current position even right after power-on, in a multi-axis form that can measure a plane at once, and it identifies the absolute position on the diffraction grating by analyzing the frequency.
*Illustrative imageAngle Measurement Using a Femtosecond Laser
The lab has developed an autocollimator that uses a mode-locked femtosecond laser as its light source. When the measured object rotates, the angle at which the laser enters the diffraction grating changes, and so does the wavelength of the diffracted light entering the detection fiber, so the angle can be determined by measuring the wavelength.
*Illustrative imageAngle Sensor with Stable Sensitivity
Angle sensors based on the autocollimation principle had a drawback: fluctuations in the frequency of the light source change the diameter of the light spot, so sensitivity is not stable in long-duration measurements. The lab is developing an angle sensor that uses a femtosecond laser as the light source and exploits the properties of the optical comb to stabilize sensitivity.
MembersFaculty
The members of the Matsukuma Lab consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorHiraku Matsukuma
VoicesStudent voices
Ratings and reviews reflect the experiences of individual current or former students, not the lab's official views. Whether a lab has reviews, or how many, says nothing about the lab itself.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
Student ratings (0 students)
--
--
--
--
--
--
Student voices answer questions like these
- What's great about this lab?
- What did you learn after joining?
- What's the vibe, and what is the professor like?
- Who is this lab for?
- Where do graduates go?
Your experience can help younger students choose their lab. Your name won't be shown.
Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Matsukuma Lab
Gao-Sato (Ryo) LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringPrecision nanometrology
Soyama-Nakai LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringIntelligent Measurement and Evaluation
Kanamori LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringInformation Nanosystems
Inomata LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringInformation NanosystemsThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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 spark” Smirnov Semen / CC BY 4.0 (cropped)
- Absolute Encoder Using a Femtosecond Laser: “Femtosecond laser filament” Onlywww / CC BY 4.0 (cropped)
- Angle Measurement Using a Femtosecond Laser: “ODIN Ti-Sapphire laser in operation” FDominec / CC BY-SA 3.0 (cropped)
- Angle Sensor with Stable Sensitivity: “Dispersion of White Light Through a Prism” Aligatorigiganti / CC0 (cropped)
- Related lab (Gao-Sato (Ryo) Lab): “Prototype Imaging Density Interferometer is on the Optical table in the foreground” notnef from Canberra, Australia / CC BY 2.0 (cropped)
- Related lab (Soyama-Nakai Lab): “Cavitating-prop” U.S. Navy / Public domain (cropped)
- Related lab (Kanamori Lab): “Optical Therapeutics and Medical Nanophotonics Laboratory ( )” The U.S. Food and Drug Administration / Public domain (cropped)
- Related lab (Inomata Lab): “Photolithography lab in the LCN cleanroom” University College London Faculty of Mathematical & Physical Sciences / CC BY 2.0 (cropped)
About LabLog
LabLog is a lab review app for students only. Student members at each university interview students in labs and publish what they say. Student voices can only be read by students who sign up with a university email address. Operated by bestiee Inc.
Learn more about LabLog ↗Search engines and AI may reference the basic lab info and rating summaries on this page and the description of LabLog. Student voices are for student members only. Automated collection by programs (scraping, or input to or training of AI) is prohibited under Article 8 of the Terms of Service. If you need data for research or analysis, please contact us.