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Brillouin Scattering in Polymer Optical Fibers: Fundamental Properties and Potential Use in Sensors
Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
* Author to whom correspondence should be addressed.
Received: 15 April 2011; in revised form: 9 May 2011 / Accepted: 25 May 2011 / Published: 26 May 2011
Abstract: We review the fundamental properties of Brillouin scattering in a perfluorinated graded-index polymer optical fiber (PFGI-POF) with 120 μm core diameter. The experiments were performed at 1.55 μm telecommunication wavelength. The Brillouin frequency shift (BFS) and the Brillouin bandwidth were 2.83 GHz and 105 MHz, respectively. The Brillouin gain coefficient was calculated to be 3.09 × 10−11 m/W, which was comparable to that of fused silica fibers. The Brillouin threshold power of the 100 m POF was estimated to be as high as 24 W, which can be, for practical applications, reduced by using POFs with smaller cores. These properties were compared with those of silica-based graded-index multi-mode fibers. We also investigated the BFS dependences on strain and temperature. They showed negative dependences with coefficients of −121.8 MHz/% and −4.09 MHz/K, respectively, which are −0.2 and −3.5 times as large as those in silica fibers. These BFS dependences indicate that the Brillouin scattering in PFGI-POFs can be potentially applied to high-accuracy temperature sensing with reduced strain sensitivity.
Keywords: Brillouin scattering; polymer optical fiber; fiber-optic sensing; nonlinear optics
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MDPI and ACS Style
Mizuno, Y.; Nakamura, K. Brillouin Scattering in Polymer Optical Fibers: Fundamental Properties and Potential Use in Sensors. Polymers 2011, 3, 886-898.
Mizuno Y, Nakamura K. Brillouin Scattering in Polymer Optical Fibers: Fundamental Properties and Potential Use in Sensors. Polymers. 2011; 3(2):886-898.
Mizuno, Yosuke; Nakamura, Kentaro. 2011. "Brillouin Scattering in Polymer Optical Fibers: Fundamental Properties and Potential Use in Sensors." Polymers 3, no. 2: 886-898.