Key Laboratory of Micro and Nano Photonic Structures Ministry of Education

Shanghai, China

Key Laboratory of Micro and Nano Photonic Structures Ministry of Education

Shanghai, China
SEARCH FILTERS
Time filter
Source Type

Liu J.,Shenzhen University | Wu M.,China e mail manmwu@szu.edu.cn | Huang B.,China e mail bhuang@hnu.edu.cn | Tang P.H.,China e mail pinghuatang@hnu.edu.cn | And 5 more authors.
IEEE Journal of Selected Topics in Quantum Electronics | Year: 2017

We demonstrate widely wavelength-tunable continuous-wave (CW) and Q-switched Er$^{3+}$-doped ZBLAN fluoride fiber lasers operating around 3 μm enabled by a volume Bragg grating (VBG). In the CW operation regime, a total wavelength tuning range of over 160 nm spanning from 2694 nm to 2854 nm has been achieved. For the Q-switched mode of operation, a slightly modified resonator configuration, incorporating a passive Q-switcher, topological insulator Bi2Te3 nanosheets, can produce stable pulse trains with a pulse width of 880 ns at a repetition rate of 81 kHz, while maintaining a wavelength tuning range of 62 nm from 2762 nm to 2824 nm through adjusting the VBG. In both operation regimes, the output spectral width is measured to be <0.3 nm (FWHM) over the whole tuning range. Our work both demonstrates the great wavelength-tuning potential of the Er$^{3+}$-doped fluoride fiber laser, and also paves a way for the development of a range of high performance mid-infrared laser sources. IEEE


Chen K.,Fudan University | Zhu H.,Fudan University | Yi X.,Fudan University | Cheng S.,Fudan University | And 10 more authors.
Chinese Optics Letters | Year: 2015

A number of zinc oxide (ZnO) films are deposited on silicon substrates using the magnetron sputtering method. After undergoing thermal treatment under different conditions, those films exhibit hexagonal wurtzite structures and different photoluminescent characteristics. Besides the notable ultraviolet emission, which is related to the free exciton effect, a distinct blue fluorescence around 475 nm is found in some special samples. The blue photoluminescence emission of the ZnO film is believed to be caused by oxygen vacancies. © 2015 Chinese Optics Letters.

Loading Key Laboratory of Micro and Nano Photonic Structures Ministry of Education collaborators
Loading Key Laboratory of Micro and Nano Photonic Structures Ministry of Education collaborators