Femtosecond Laser Micro-Machined V-Shaped Fiber Micro-Cavity and Its Interference Spectrum Characteristics

Weigang, 张伟刚 Zhang; Zhuolin, 刘卓琳 Liu; Limei, 殷丽梅 Yin

doi:10.3788/aos201131.0706007

Cited by 2 publications

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“…There are 3 types of simple fiber microstructures, D-shaped [7][8][9][10][11][12], hole [14,15] and V-shaped [16]. D-shaped and hole fiber microstructures have been reported in application of refractive index (RI) sensing.…”

Section: Introductionmentioning

confidence: 99%

Refractive Index Sensor of V-Shaped Fiber Microstructure Fabricated by Femtosecond Laser

Sun

Deng

2013

AMR

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The defect of fiber core or cladding near the core could result in imperfect total internal reflection (ATR) via multiple internal reflections along the fiber and attenuated light intensity of fiber. In this paper, V-shaped fiber microstructure was fabricated by femtosecond (fs) laser. The loss of light energy is sensitive to surrounding refractive index (RI), which is used to detect the refractive index of surrounding media. The depth of V-shaped microstructure is controlled by fabrication process, and it found that it has evident effect on RI sensitivity.

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Section: Introductionmentioning

confidence: 99%

Refractive Index Sensor of V-Shaped Fiber Microstructure Fabricated by Femtosecond Laser

Sun

Deng

2013

AMR

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Study on characteristics and fluid sensing of unparallel wall fiber micro-cavity Mach-Zehnder interferometer fabricated by femtosecond laser micromachining

Yin¹,

Zhang²,

Xue³

et al. 2012

Acta Phys. Sin.

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It is found that two walls of fiber micro-cavity fabricated by femtosecond laser micromachining are not perpendicular to the fiber axis. Interference spectrum of the unparallel wall fiber micro-cavity Mach-Zehnder interferometer (MZI) shows abnormal characteristics, such as optical path difference decreasing linearly with wavelength increasing and the total loss decreasing with wavelength increasing. In this regard, we propose an unparalleled wall fiber micro-cavity MZI model and establish analytical theory. By using new models and theories, the new micro-cavity interferometer characteristics are studied, including that the effects of corner and depth on spectral peak wavelength are numerically analysed and transmission loss, absorption loss, insertion loss, infrared absorption loss of material as well as how they affect the interference fringe contrast are theoretically studied. Theoretical analyses and experimental results are in agreement with each other. For fluid sensing, a high-quality unparallel wall fiber micro-cavity MZI is fabricated. The interference fringe contrast of the fiber micro-cavity reaches up to 35 dB in water. Experimental results show that the sensor exhibits an ultrahigh RI sensitivities, as high as——12937.31 nm/RIU in aqueous solution of sucrose.

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Femtosecond Laser Micro-Machined V-Shaped Fiber Micro-Cavity and Its Interference Spectrum Characteristics

Cited by 2 publications

References 0 publications

Refractive Index Sensor of V-Shaped Fiber Microstructure Fabricated by Femtosecond Laser

Refractive Index Sensor of V-Shaped Fiber Microstructure Fabricated by Femtosecond Laser

Study on characteristics and fluid sensing of unparallel wall fiber micro-cavity Mach-Zehnder interferometer fabricated by femtosecond laser micromachining

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