| Title | A mode generator and multiplexer at visible wavelength based on all-fiber mode selective coupler |
| Authors | Yao, Han Shi, Fan Wu, Zhaoyang Xu, Xinzhu Wang, Teng Liu, Xiaomin Xi, Peng Pang, Fufei Zeng, Xianglong |
| Affiliation | Shanghai Univ, Shanghai Inst Adv Commun & Data Sci, Key Lab Specialty Fiber Opt & Opt Access Networks, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Shanghai 200444, Peoples R China Peking Univ, Coll Engn, Dept Biomed Engn, Beijing 100871, Peoples R China Max Planck Inst Polymer Res, Mainz 55128, Germany |
| Keywords | VORTEX BEAMS LASER TRANSMISSION ULTRAVIOLET RESOLUTION |
| Issue Date | Apr-2020 |
| Publisher | NANOPHOTONICS |
| Abstract | Using an all-fiber mode selective coupler (MSC) at the visible band, here we experimentally demonstrate a generating and wavelength multiplexing scheme for the cylindrical vector (CV) and vortex beams (VBs). The proposed MSCs act as efficient mode converters to produce spectrally insensitive high-order modes (HOMs) at the wavelength ranging from 450 to 980 nm, which have broad operation bandwidth (more than 7 nm), high mode conversion efficiency (94%), and purity (98%), and low insert loss (below 0.5 dB). By adjusting the polarization state and the phase shift of linear polarization (LP)(11) mode respectively, the donut-shaped CVs and circular-polarization VBs are achieved. The focused intensity distribution of the donut beam on the cross- and axial-sections is monitored by using a confocal system. The all-fiber solution of producing and multiplexing HOMs opens a new route for stimulated emission depletion microscopy applications. |
| URI | http://hdl.handle.net/20.500.11897/588590 |
| ISSN | 2192-8606 |
| DOI | 10.1515/nanoph-2020-0050 |
| Indexed | SCI(E) |
| Appears in Collections: | 工学院 |
