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Ravivudh Khun-in
(芝浦工業大学 大学院理工学研究科 機能制御システム専攻)
会議名 OSA Advanced Photonics Congress
期日 2018年7月1日〜7日
開催地 ETH Zurich, Zurich, Switzerland

The OSA Advanced Photonics Congress (APC) was held in ETZ Zurich, Zurich, Switzerland from July 2 to July 5, 2018. The APC is comprised of eight topical meetings, and addresses the many aspects of photonic device research and development and their use in networks. Meeting topics include integrated photonics research, nonlinear optics, optical sensors, photonic networks and devices, specialty optical fibers, and so on.

Integrated photonic circuits and stand-alone components such as switches and modulators in silicon, lll-V, graphene and polymer material systems are covered, as well as nano-photonic and quantum devices and concepts. Novel materials such as metamaterials, plasmonics, and other specially designed materials and their potential use in devices are examined as well as advances in materials with optical gain, nonlinear optical materials, novel optical glasses and crystals and ceramics. The latest uses of photonics for sensors such as fiber sensors, for light sources, and for data transfer are also examined. The latest advances in optical interconnects, switching technologies, signal processing and network virtualization are also presentation topics.

≪APC会場≫ ≪ETH Zurich≫

In this meeting, my presentation was entitled “Resonant wavelength observation by 3D printed mechanically induced long-period fiber grating device.” The main purpose of long-period fiber grating (LPFG) is to lead the light coupling from fundamental core mode to cladding modes inside a single-mode fiber. The mode coupling characteristic is in the form of wavelength dip called the resonant wavelength. Each of resonant wavelengths corresponds to each of coupling modes. In optical communication, some wavelengths are considered as noises or unwanted signals, which deteriorates the transmission performance through an optical fiber.

Mechanically induced LPFG technique is different from other gratings since the appearance of the LPFG on fiber structure comes from external device with its periodic surface structure directly pressing on the optical fiber as a perturbation. Several periodic structure devices have been presented such as nylon string and coiled spring. The twisted nylon and coin represent the periodic structure device creating the LPFG on the fiber. In this paper, we propose the new device which has simpler fabrication process and setup to create the LPFG. The device is fabricated by a high resolution 3D printer. The grating period of our proposed device can categorize the transmitted light out of the fiber and the resonant wavelength can be observed.

3. 国際会議に出席した成果(コミュニケーション・国際交流・感想)

The APC was one of the conference that meet the point of view of my research topic as there were several topics in the same field related to optical sensors topic. Fiber Bragg grating (FBG) and LPFG play the key role in several sensors by using optical fiber as a medium. The oral presentation by author from Universite de Mons gave several ideas relating to the usage of FBG which also could be developed in LPFG as well. Moreover, several types of sensor as the resonant wavelength by applying Bragg grating were also presented by 5 authors in the same section.

One research which was very close to my research was found in poster session that gave me a very good opportunity to exchange our knowledge in almost the same field. Even though we had the different proposed method, but we had the same objective as an optical sensor, mode coupling application.

Finally, several ideas for further research could not be gained without attending this conference. Thank you to all supporters who brought me to Zurich to be a part of OSA meeting that led the optical innovation and technology to the world.

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