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Musha Lab
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The lab develops lasers whose frequency and intensity are stabilized to the utmost limit.
AboutAbout the lab
Building lasers with stability pushed to the limit.
The Musha Lab researches the development of lasers whose frequency and intensity stability is raised to the utmost limit, along with their applications.
For ultra-high-precision measurement, including gravitational wave detectors, the lab is developing highly stable light sources and ultra-stable optical frequency references.
It also works on technology for transmitting an ultra-stable frequency reference over long distances through optical fiber without degrading it, and on developing new types of light sources that use optical fiber.
Key terms
- Gravitational waves
- Ripples in space-time, caused by massive changes in the mass of celestial objects, that propagate as waves
- Optical frequency comb
- A light source whose longitudinal modes are evenly spaced across the optical frequency domain, which can be used as a "ruler" for measuring frequency
- Optical lattice clock
- A next-generation atomic clock that aims for far higher accuracy than current cesium atomic clocks
ResearchResearch themes
The Musha Lab researches lasers whose frequency and intensity stability is raised to the utmost limit, along with their applications. It works on light sources for gravitational wave detectors, transmission of optical frequency references through optical fiber, and the development of new types of light sources.
*Illustrative imageLight Sources for Space-Based Gravitational Wave Detectors
The lab is developing light sources for DECIGO and Pre-DECIGO, detectors designed to capture gravitational waves in space. These detectors require high-output light sources whose frequency and intensity are stabilized to the utmost limit, and the lab builds lasers whose frequency is stabilized using iodine molecules as a reference.
*Illustrative imagePrecise Transmission of Optical Frequency References
The lab is developing a precision transmission system that creates a broadband, high-accuracy optical frequency reference and sends it through optical fiber to other labs and distant research institutions. The reference is realized by phase-locking an ultra-narrow-linewidth light source to an optical frequency comb, with the aim of transmission over several tens of kilometers.
*Illustrative imageLaser Light Sources for Optical Lattice Clocks
The lab is developing trap light sources for Sr optical lattice clocks, which are expected to become a next-generation optical frequency standard. Because high laser intensity and the magic wavelength are required, the lab uses external-cavity semiconductor lasers and optical amplifiers based on thulium-doped fluoride fiber.
MembersFaculty
The members of the Musha Lab consist of faculty, master's and undergraduate students, and collaborating researchers.As of 2026
- ProfessorMitsuru Musha
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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: “Baffled LIGO Scientists” Nkij / CC BY 4.0 (cropped)
- Light Sources for Space-Based Gravitational Wave Detectors: “LISA-waves” NASA / Public domain (cropped)
- Precise Transmission of Optical Frequency References: “Optical fiber connectors-optical patch cable-01ASD” Asurnipal / CC BY-SA 4.0 (cropped)
- Laser Light Sources for Optical Lattice Clocks: “Sr-lattice-optical-atomi-clock opt” The Ye group and Brad Baxley, JILA / Public domain (cropped)
- Related lab (森永 実 研究室): “Single Photon Detectors ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (張 贇 研究室): “ALE4077” Alessiocoser / CC BY 4.0 (cropped)
- Related lab (丹治 はるか 研究室): “Optical cavities” No machine-readable author provided. Fffred~commonswiki assumed (based on copyright claims). / Public domain (cropped)
- Related lab (上野 芳康 研究室): “Propagation of light through the core of an optical fiber. Macro visualization.” AZToshkov / CC BY-SA 3.0 (cropped)
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