| Author(s) | Organization(s) | Session |
| O'Dwyer, Kevin | Maynooth University, Ireland | POSTER SESSION 1 |
| Oheim, Martin | Université de Paris, CNRS, SPPIN – Saints-Pères Paris Institute for the Neurosciences, Paris, France | POSTER SESSION 1 |
| Oheim, Martin | CNRS, Paris, France | Advances in imaging techniques Presenter |
| Ohishi, Yasukate | Research Center for Advanced Photon Technology, Toyota Technological Institute, Nagoya, Japan; Toyota Technological Insitute, Japan | Specialty Optical Fibers II Specialty Optical Fibers I Presenter |
| Olevsko-Arad, Ilya | Chemistry department, Bar-Ilan University, 529000, Ramat-Gan, Israel; Institute of Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, 529000, Ramat-Gan, Israel | POSTER SESSION 1 |
| Oppo, Gian-Luca | SUPA & CNQO, Department of Physics, University of Strathclyde, 107 Rottenrow, Glasgow, G4 0NG, UK | Nonlinear fiber lasers Nonlinear wave mixing and frequency combs |
| Ortiz-Rivero, Elisa | Nanomaterials for bioimaging Group, Universidad Autónoma de Madrid, Spain; Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Spain | Applications of Optics and Photonics Presenter |
| Osellame, Roberto | Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Piazza Leonardo da Vinci, 32, Milano, 20133, Italy.; IFN CNR MILANO; Institute for Photonics and Nanotechnologies (IFN), CNR, Milan, Italy | 3D fluorescence imaging Bioinspired optics and sensors Bioinspired optics and sensors |
| Otsuji, Taiichi | Research Institute of Electrical Communication, Tohoku University, Japan | Nanomaterials and applications |
| Ottevaere, Heidi | Brussels Photonics, Vrije Universiteit Brussel, Belgium | Industrial mastering of optical technologies and systems, IMOTS S01 |
| Ou, Haiyan | Technical University of Denmark, DTU Electro, 2800 Lyngby, Denmark | POSTER SESSION 1 |
| Oxenlowe, Leif | Technical University of Denmark, Denmark | Microcombs II Presenter |
| Ozawa, Akira | Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany | POSTER SESSION 1 |