Laser & Optoelectronics Progress, Volume. 56, Issue 17, 170629(2019)
Photonic Crystal Fiber Mach-Zehnder Interferometer Based on Refractive Index Sensitivity of Cladding Corrosion Optimization
In order to reduce the thickness of fiber cladding and improve the refractive index sensitivity of the interferometer, a simple photonic crystal fiber (PCF) Mach-Zehnder interferometer which is easy to fabricate is developed. First, a PCF is fused between two single-mode fibers; then, in a self-made etching tank, hydrofluoric acid is used to reduce the thickness of the cladding. The effects of the length, corrosion time, and ambient temperature on the sensitivity of PCFs are studied by controlling the above variable factors. The results show that the sensitivity increases with the increasing length of the optical fiber, and increases about three times after 40 min corrosion in hydrofluoric acid solution with mass fraction of 40% for 3 cm PCF. The ambient temperature has little influence on the sensitivity of the PCF Mach-Zehnder interferometer.
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Guojia Huang, Shizhang Ma, Lian Wang, Shiping Li, Wenlin Feng. Photonic Crystal Fiber Mach-Zehnder Interferometer Based on Refractive Index Sensitivity of Cladding Corrosion Optimization[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170629
Category: Fiber Optics and Optical Communications
Received: May. 9, 2019
Accepted: Jun. 24, 2019
Published Online: Sep. 5, 2019
The Author Email: Feng Wenlin (wenlinfeng@126.com)