Strain-induced spectral tuning of the whispering gallery modes in a cylindrical micro-resonator formed by a polymer optical fiber
Strain-induced spectral tuning of the whispering gallery modes in a cylindrical micro-resonator formed by a polymer optical fiber
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DOI：
10.1364/ao.56.001339
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发表时间：
2017-02-10
期刊：
影响因子：
1.9
通讯作者：
Semenova, Yuliya
中科院分区：
文献类型：
--
作者：
Kavungal, Vishnu;Mallik, Arun Kumar;Semenova, Yuliya
研究了聚合物光纤（POF）构成的圆柱形微谐振腔中回音壁模（WGM）的机械应变辅助光谱调谐技术。基于POF的微柱中的WGM通过使用锥形单模石英光纤的倏逝光耦合来激发。在石英光纤锥的透射光谱中观察到的WGM具有高达19 dB的高消光比和高达2.64 x 10（4）的品质因数（Q因数）。在从0到1746 μ m（0.17%）的范围内的拉伸轴向应变（μ m）到POF微谐振器的应用导致WGM光谱的线性偏移，灵敏度为0.66 pm/μ m。在施加的应变的影响下，WGM经历蓝移，并在应变减小后返回到它们的初始光谱位置。这种应变可调谐塑料光纤微谐振腔在光纤传感和可调谐微型激光器方面具有潜在的应用前景。(C)2017美国光学学会
A mechanical strain assisted technique for spectral tuning of whispering gallery modes (WGM) in a cylindrical micro-resonator formed by a polymer optical fiber (POF) is investigated. WGMs in the POF-based micro-cylinder are excited by evanescent light coupling using a tapered single mode silica fiber. WGMs observed in the transmission spectrum of the silica fiber taper have a high extinction ratio of up to 19 dB and a quality factor (Q-factor) of up to 2.64 x 10(4). The application of tensile axial strain (mu epsilon) in the range from 0 to 1746 mu epsilon (0.17%) to the POF micro-resonator results in a linear shift of the WGM spectrum with a sensitivity of 0.66 pm/mu epsilon. Under the influence of the applied strain, the WGMs undergo a blue shift and return to their initial spectral positions after the strain is decreased. The proposed strain tunable POF micro-resonator has potential applications in fiber optic sensing and tunable micro lasers. (C) 2017 Optical Society of America