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Kita Lab
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The lab integrates optical devices on silicon chips to create ultra-compact optical communication technology.
AboutAbout the lab
Building ultra-compact optical devices.
The Kita Lab researches silicon photonics, which integrates optical devices on silicon chips.
The lab works on developing compact, low-power optical devices that support optical communication over optical fiber.
The integrated optical devices it develops are expected to be applied not only to communications but also to medical applications and environmental sensing.
Key terms
- Silicon photonics
- Technology for making optical components compactly on top of a silicon chip
- Semiconductor laser
- A small device that uses a semiconductor to amplify light and emit laser light
- Photonic integrated circuit
- A circuit that combines multiple optical components on a single small chip
NewsLab news
Paper published in Jpn. J. Appl. Phys.
Paper published in Jpn. J. Appl. Phys.
Development of an ultra-compact optical circuit monitor that amplifies photocurrent 340 times more than conventional ones
Paper published in Jpn. J. Appl. Phys.
A paper by a graduate of the lab was selected for JJAP Highlights of 2024
ResearchResearch themes
The Kita Lab studies integrated optical devices that apply silicon photonics. It aims at a wide range of applications, from optical communications to medical optical devices and environmental sensing.
*Illustrative imageWavelength-tunable lasers made on silicon
This research builds compact, low-power, wavelength-tunable lasers on silicon by combining ring resonator filters with optical amplifiers.
*Illustrative imageHigh-speed optical phase shifters
The lab improves thermo-optic elements, which use heat to change the phase of light, so that they operate faster, and is developing compact, low-loss phase shifters.
*Illustrative imageTwo-wavelength lasing with quantum dots
Using quantum dots, which are tiny nanostructures, the lab studies lasers that can emit light at two wavelengths simultaneously, as well as circuits that apply them.
*Illustrative imageReducing laser noise using light
The lab reduces the frequency fluctuation of laser light using optical negative feedback, in which light is returned into the device, aiming for more accurate communication.
MembersFaculty
The Kita Lab's members consist of faculty, master's and undergraduate thesis students, and administrative assistants.As of 2026
- ProfessorTomohiro Kita
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RelatedLabs similar to Kita Lab
Tackeuchi LabSchool of Advanced Science and Engineering, Department of Applied PhysicsSemiconductor device engineering
Aoki LabSchool of Advanced Science and Engineering, Department of Applied PhysicsQuantum optics
Ozawa LabSchool of Advanced Science and Engineering, Department of Applied PhysicsMathematical Physics
Kataoka LabSchool of Advanced Science and Engineering, Department of Applied PhysicsHigh-energy astrophysics and medical applicationsThe 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: “5C2A5953R - – Silicon Wafer 20200519” Rob Bulmahn / CC BY 2.0 (cropped)
- Wavelength-tunable lasers made on silicon: “Panther chameleon (Furcifer pardalis) male Nosy Be” Charles J. Sharp / CC BY-SA 4.0 (cropped)
- High-speed optical phase shifters: “Schlieren-color-candle-plume” Settles1 / CC BY 3.0 (cropped)
- Two-wavelength lasing with quantum dots: “054 366 - Watermelon tourmaline, February 23, )” Judy Gallagher / CC BY 2.0 (cropped)
- Reducing laser noise using light: “Boulton and Watt centrifugal governor-MJ” Dr. Mirko Junge / CC BY 3.0 (cropped)
- Related lab (Tackeuchi Lab): “Femtosecond laser spark” Smirnov Semen / CC BY 4.0 (cropped)
- Related lab (Aoki Lab): “Fibres optique” Pastèque24 / CC BY-SA 4.0 (cropped)
- Related lab (Ozawa Lab): “World First Hiperboloid structure named Shukhov Tower in Polibino” Arssenev / CC BY-SA 4.0 (cropped)
- Related lab (Kataoka Lab): “Fermi Gamma-ray Space Telescope spacecraft model” NASA / Public domain (cropped)
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