ALPS'17 Shota Honda
Research
ALPS'17 (The 6th Advanced Lasers and Photon Sources) Activity Report
Shota Shota, 1st year master's student
Outline
The sixth OPIC was held from April 18 to 21 at Pacifico Yokohama. Organized by the OPTICS & PHOTONICS International Council, OPIC consisted of 12 technical meetings and was held concurrently with OPIE, an exhibition of optical technologies. In conjunction with OPIC, some stores around Minatomirai Station offered discounts to visitors who presented their IDs.
2. about his/her own presentation
The title of the presentation was "Tuning supermode splitting for stimulated Brillouin scattering", which was the same as the one presented at the Japan Society of Applied Physics. I was very nervous before the presentation because it was my first international presentation. The presentation went as well as practiced, but there were several occasions when I had trouble answering questions during the Q&A session. I felt that I should try to answer questions to which it is difficult to give clear answers by dividing them into theoretical and experimental aspects. Compared with the similar presentations at the Japan Society of Applied Physics, there seemed to be more basic questions such as how to improve Q-values, coupling efficiency with tapers, etc. At CLEO/Europe to be held in June, the session title was "Brillouin lasers and scattering. I am looking forward to a detailed discussion of Brillouin lasers at CLEO/Europe in June, since the session title is "Brillouin lasers and scattering". However, I will need to improve my English language skills to do so, so I will prepare more thoroughly than this time.
3. announcements of interest
Light robotics: aiming towards all-optical nano-robotics (invited) [OMC3-1].
The presentation featured the fabrication of microstructures using light and the manipulation of these microstructures using light. The microstructure fabrication using light is based on two-photon absorption, and the product used was the Photonic Professional GT from Nanoscribe, Inc. This device makes it possible to easily fabricate desired structures by inputting CAD data. The fabricated structure has a size of 40 μm x 40 μm and is a spherical structure that looks like four tires, and three-dimensional mobility is achieved using optical trapping technology. The body part is shaped like a bottle with a hole at the top (Fig. (a)). Figure (b) shows the robot in action, sucking in small particles. Figure (b) shows the robot in action, sucking in small particles and spitting them out. He mentioned drug delivery as an application. He also said that he will soon publish a book on light robotics.
Recent progress on Kumgang Laser - Coherent Beam Combination Laser using Self-controlled Stimulated Brillouin Scattering Phase Conjugate Mirrors (SBS-PCMs) [ALPS10-3].
I picked it up simply because it contained the keyword "induced Brillouin scattering. The group is aiming to develop a laser with an average output power of 4 kW (4×0.1 J @ 10 kHz/10 ns) (="KumgangLaser"), and this presentation was an interim report. By increasing the number of laser amplifiers, the heat load is distributed and higher output power is achieved. The phase conjugate mirrors of induced Brillouin scattering (SBS-PCMs) are used for phase compensation. 4-wave mixing also generates phase conjugated light, but the structure of induced Brillouin scattering is simpler. SBS-PCMs was used here because the structure of induced Brillouin scattering is simpler. In this report, an average output power of 640 W (64 mJ @ 10 kHz/8.7 ns) was achieved.
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