Sensors 2011, 11(3), 2488-2495; doi:10.3390/s110302488
Article

A Transflective Nano-Wire Grid Polarizer Based Fiber-Optic Sensor

College of Engineering and Applied Sciences and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
* Author to whom correspondence should be addressed.
Received: 9 January 2011; in revised form: 27 January 2011 / Accepted: 17 February 2011 / Published: 28 February 2011
(This article belongs to the Special Issue Metamaterials for Sensing)
PDF Full-text Download PDF Full-Text [322 KB, Updated Version, uploaded 1 March 2011 10:59 CET]
The original version is still available [321 KB, uploaded 28 February 2011 12:48 CET]
Abstract: A transflective nano-wire grid polarizer is fabricated on a single mode fiber tip by focused ion beam machining. In contrast to conventional absorptive in-line polarizers, the wire grids reflect TE-mode, while transmitting TM-mode light so that no light power is discarded. A reflection contrast of 13.7 dB and a transmission contrast of 4.9 dB are achieved in the 1,550 nm telecom band using a 200-nm wire grid fiber polarizer. With the help of an optic circulator, the polarization states of both the transmissive and reflective lights in the fiber may be monitored simultaneously. A kind of robust fiber optic sensor is thus proposed that could withstand light power variations. To verify the idea, a fiber pressure sensor with the sensitivity of 0.24 rad/N is demonstrated. The corresponding stress-optic coefficient of the fiber is measured. In addition to pressure sensing, this technology could be applied in detecting any polarization state change induced by magnetic fields, electric currents and so on.
Keywords: subwavelength structures; fiber optics sensors; pressure measurement; polarization-selective devices

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

MDPI and ACS Style

Feng, J.; Zhao, Y.; Lin, X.-W.; Hu, W.; Xu, F.; Lu, Y.-Q. A Transflective Nano-Wire Grid Polarizer Based Fiber-Optic Sensor. Sensors 2011, 11, 2488-2495.

AMA Style

Feng J, Zhao Y, Lin X-W, Hu W, Xu F, Lu Y-Q. A Transflective Nano-Wire Grid Polarizer Based Fiber-Optic Sensor. Sensors. 2011; 11(3):2488-2495.

Chicago/Turabian Style

Feng, Jing; Zhao, Yun; Lin, Xiao-Wen; Hu, Wei; Xu, Fei; Lu, Yan-Qing. 2011. "A Transflective Nano-Wire Grid Polarizer Based Fiber-Optic Sensor." Sensors 11, no. 3: 2488-2495.

Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert