Symposium

UEC-ERATOsympoポスター

2019/04/26(Fri)
Optical Frequency Comb and Ultrashort Pulse Laser


Date2019/04/26(Fri) 13:30~15:30
LocationRoom 341, 3rd fl. Bldg. E-5
map No.12 / access
Title
Speaker
  • "Sending frequency comb light over the air with applications to future optical clock networks and atmospheric spectroscopy"
    Dr. Nathan R. Newbury (NIST, USA)

    Abstract: Laser frequency combs can provide new capabilities across a range of precision measurements. I will discuss their unique properties and two applications currently pursued in our group. In both applications, frequency comb light is transmitted over long open air paths. In the first application, we exploit the femtosecond timing noise of frequency comb light to synchronize the time and frequency at two remote sites. This technique should enable future distributed optical clock networks. In the second application, we exploit the broad spectrum of frequency comb light to probe the atmospheric infrared absorption and thereby measure important atmospheric gases, such as carbon dioxide and methane, with high precision.

  • "Manipulation pulse in a mode locking fiber laser: a route to low noise laser resources"
    Prof. Minglie Hu (Tianjin Universtity, China)

    Abstract: A short introduction for the mode-locking and a brief review of recent work on high power femtosecond fiber laser are demonstrated, which shows that few cycle laser pulse can be obtained by optimization of nonlinear process in fiber laser system. Pulse dynamics optimization also bring great impact on the time jitter of the pulse train. These new laser resources provide convenience for novel applications in the fields of high precision fabrication and measurement, experimental quantum physics, functional materials, etc.

OrganizeJST, ERATO MINOSHIMA Intelligent Optical Synthesizer Project
Institute for Advanced Science, UEC
ContactMinoshima Laboratory, UEC

Past UEC-ERATO Symposium

UEC-ERATOsympoポスター

2018/04/23(Mon)
Optical Frequency Comb and Ultrashort Pulse Laser


Date2018/04/23(Mon) 13:30~15:30
LocationRoom 301, 3rd fl. Bldg. E-3
map No.27 / access
Title
Speaker
  • "Broad bandwidth synthesis and spectroscopy with laser frequency combs"
    Dr. Scott Diddams (NIST, USA)

    Abstract: A laser frequency comb provides a vast array of absolutely known and precisely controlled spectral lines that can be used for direct spectroscopy as well as spectral calibration. In this talk, we present recent laser and nonlinear optics advances that extend laser frequency comb spectral coverage from 350 nm to beyond 20,000 nm. This is accomplished with robust erbium-fiber laser technology in the 1550 nm region that pumps nonlinear photonic platforms such as lithium niobate, gallium phosphide, and silicon nitride. Of particular interest is a simple and robust method for generating frequency combs spanning the 6-20 micron fingerprint region through intra-pulse difference frequency generation in an orientation-patterned gallium phosphide crystal. This frequency comb is orders of magnitude brighter than thermal light sources and comparable to infrared beam lines at synchrotron user facilities. We demonstrate the utility of our unique, coherent light source for high-resolution (100 MHz), dual-comb spectroscopy of molecular compounds.

  • "Advanced Optical Metrology and Fabrication using Mode-locked Lasers"
    Prof. Seung-Woo Kim (KAIST, South Korea)

    Abstract: Precision is a common aspect that governs most of today’s leading-edge technologies including IT, BT, NT and aerospace technology. In response to ever-growing demands on precision, various laser sources have been used to attain sub-wavelength precision in many fields of fabrication and metrology by means of photons. This precision-directed laser-based photonics will continue to advance to the direction of ultraprecision to achieve better resolutions, larger functional ranges, higher throughputs, and more improved stability. Nonetheless, the light sources available today are limited in the wavelength bandwidth, photon energy, spatial and temporal coherence, and peak power, which consequently hinders breakthroughs toward the realm of ultraprecision. The research objective of the Precision Engineering & Metrology Group at KAIST is to investigate the technological possibilities of ultrashort mode-locked lasers with the aim of establishing the new foundations for ultraprecision that will enable nano-fabrication and distance and dimensional metrology over extensive ranges as demanded in the next generation of precision engineering. To the end, a systematic approach will be pursued to generate noble coherent light sources covering the broad optical spectrum spanning from THz waves, infrared, visible to extreme violet light radiation by making the most of ultrafast femtosecond laser pulses.

OrganizeJST, ERATO MINOSHIMA Intelligent Optical Synthesizer Project
Institute for Advanced Science, UEC
ContactMinoshima Laboratory, UEC

2018/04/23 Poster[PDF]

2017/08/25(Fri)
Special Lecture on Optical Coherence Tomography

Two symposia with lectures by internationally renowned invited speakers on Optics and Photonics was be held as follows.
No admission fee. Everyone is welcome to attend. 2017/8/25(Fri):Special Lecture on Optical Coherence Tomography
Title/Speaker
"Optical Coherence Tomography and Biomedical Imaging"
Fujimoto, James G. (MIT, USA)
2017/8/26(Sat):International Symposium on Optical Frequency Comb
Title/Speaker
"Gas plume detection with dual-frequency comb spectroscopy"
Coddington, Ian (NIST, USA)

"Nonlinear Comb Spectroscopy"
Cundiff, Steven (Michigan University, USA)

"Frequency-comb-referenced precision measurement of surface profiles and refractive indices"
Kim, Young-Jin (Nanyang Technological University, Singapore)

"Measurement of Frequency Bin Entanglement in Biphoton Frequency Combs"
Weiner, Andrew (Purdue University, USA)

"Single-cavity dual-comb fiber lasers and their metrology applications"
Zheng, Zheng (Beihang University, China)

UEC-ERATOsympoポスター
Date2017/08/25(Fri)
13:30~14:30
LocationRoom 301, Bldg. E-3
(No.27)
Title/Speaker"Optical Coherence Tomography and Biomedical Imaging"
James G. Fujimoto (MIT, USA)
OrganizeJST, ERATO MINOSHIMA Intelligent Optical Synthesizer Project
Co-organizeInstitute for Advanced Science, UEC
Brain Science Inspired Life Support Research Center, UEC
Contact: Minoshima Laboratory, UEC

2017/08/25 poster[PDF] Go to top of page

2017/08/26(Sat)
International Symposium on Optical Frequency Comb
~Recent Progress in Optical Frequency Comb~

UEC-ERATOsympoポスター
Date2017/08/26(Sat)
10:00~13:00
LocationRoom 241, 2nd fl. Bldg. E-5
(No.12)
Title/Speaker "Measurement of Frequency Bin Entanglement in Biphoton Frequency Combs"
Weiner, A. (Purdue University, USA)

"Nonlinear Comb Spectroscopy"
Cundiff, S. (Michigan University, USA)

"Single-cavity dual-comb fiber lasers and their metrology applications"
Zheng. Z. (Beihang University, China)

"Gas plume detection with dual-frequency comb spectroscopy"
Coddington, I. (NIST, USA)

"Frequency-comb-referenced precision measurement of surface profiles and refractive indices"
Kim, Y. (Nanyang Technological University, Singapore)
OrganizeJST, ERATO MINOSHIMA Intelligent Optical Synthesizer Project
Co-organizeInstitute for Advanced Science, UEC
Contact: Minoshima Laboratory, UEC

2017/08/26 poster[PDF] Go to top of page