期刊
OPTICS EXPRESS
卷 23, 期 16, 页码 21175-21180出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.021175
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资金
- Italian MIUR-FIR program [RBFR122KL1]
- Ente Cassa di Risparmio di Firenze project [2014.0770A2202.8861]
A novel all-in-fiber method for coupling light to high-Q silica whispering gallery mode (WGM) optical micro-resonators is presented, which is based on a pair of long period fiber gratings (LPGs) written in the same silica fiber, along with a thick fiber taper (15-18 mu m in waist) in between the LPGs. The proposed coupling structure is robust and can be replicated many times along the same fiber simply cascading LPGs with different bands. Typical Q-factors of the order of 108 and total coupling efficiency up to 60% were measured collecting the resonances of microspheres or microbubbles at the fiber end. This approach uniquely allows quasi-distributed and wavelength selective addressing of different micro-resonators along the same fiber. (C) 2015 Optical Society of America
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