Time Delay Measurements as Promising Technique for Tilted Fiber Bragg Grating Sensors Interrogation
A novel interrogation technique for tilted fiber Bragg gratings (TFBGs) sensors based on single wavelength time delay measurements is presented. To this aim, the group delay of a weakly TFBG has been characterized by direct time-domain measurement. The experimental characterization shows the capabil...
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| Veröffentlicht in: | IEEE photonics technology letters 2009-12, Vol.21 (23), p.1752-1754 |
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| container_title | IEEE photonics technology letters |
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| creator | Pisco, M. Ricciardi, A. Campopiano, S. Caucheteur, C. Megret, P. Cusano, A. |
| description | A novel interrogation technique for tilted fiber Bragg gratings (TFBGs) sensors based on single wavelength time delay measurements is presented. To this aim, the group delay of a weakly TFBG has been characterized by direct time-domain measurement. The experimental characterization shows the capability of TFBGs to speed up and slow down the propagation velocity of an optical pulse in optical fiber. These sharp group delay features of the TFBGs are exploited for refractometric applications to detect the surrounding refractive index (SRI) variations by single wavelength time delay measurements. The obtained results demonstrate the possibility to detect SRI changes by means of single wavelength time delay measurements with enhanced sensitivity in the range 1.33-1.40 with respect to previously reported interrogation techniques. |
| doi_str_mv | 10.1109/LPT.2009.2032780 |
| format | Article |
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To this aim, the group delay of a weakly TFBG has been characterized by direct time-domain measurement. The experimental characterization shows the capability of TFBGs to speed up and slow down the propagation velocity of an optical pulse in optical fiber. These sharp group delay features of the TFBGs are exploited for refractometric applications to detect the surrounding refractive index (SRI) variations by single wavelength time delay measurements. 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The obtained results demonstrate the possibility to detect SRI changes by means of single wavelength time delay measurements with enhanced sensitivity in the range 1.33-1.40 with respect to previously reported interrogation techniques.</description><subject>Bragg gratings</subject><subject>Delay effects</subject><subject>Fiber-optics sensors</subject><subject>Fibers</subject><subject>Group delay</subject><subject>Interrogation</subject><subject>interrogation techniques</subject><subject>Optical fibers</subject><subject>Optical propagation</subject><subject>Optical pulses</subject><subject>Optical refraction</subject><subject>Propagation delay</subject><subject>Sensor phenomena and characterization</subject><subject>Sensors</subject><subject>tilted fiber Bragg gratings (TFBGs)</subject><subject>Time delay</subject><subject>Time domain analysis</subject><subject>Time measurement</subject><subject>Wavelength measurement</subject><subject>Wavelengths</subject><issn>1041-1135</issn><issn>1941-0174</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkDFPwzAQhS0EEqWwI7FYLEwtPjtunBEKLZWKqESYLce9lFRJXOx06L_HUSsGlrvT6Xund4-QW2BjAJY9Llf5mDOWxSJ4qtgZGUCWwIhBmpzHmcUZQMhLchXCljFIpEgGxOZVg_QFa3Og72jC3mODbReoCXTlXVOFqt3QHO13W_3skZbO07yqO1zTWVWgp8_ebDZ07k3Xg5_YBucDXbQdeu82cevaa3JRmjrgzakPydfsNZ--jZYf88X0aTmygvNuZNbSJHZiFJhCSL5WnCGUaIRlVpQpTEpTClWyQqzjx6qwKaQZYFEIUAiGiyF5ON7deRe9hk5H-xbr2rTo9kGrVDIOgiWRvP9Hbt3et9GcVlJNgEvVn2NHyHoXgsdS73zVGH_QwHSfuY6Z6z5zfco8Su6OkgoR_3DJU57IVPwCheZ9nw</recordid><startdate>20091201</startdate><enddate>20091201</enddate><creator>Pisco, M.</creator><creator>Ricciardi, A.</creator><creator>Campopiano, S.</creator><creator>Caucheteur, C.</creator><creator>Megret, P.</creator><creator>Cusano, A.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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To this aim, the group delay of a weakly TFBG has been characterized by direct time-domain measurement. The experimental characterization shows the capability of TFBGs to speed up and slow down the propagation velocity of an optical pulse in optical fiber. These sharp group delay features of the TFBGs are exploited for refractometric applications to detect the surrounding refractive index (SRI) variations by single wavelength time delay measurements. The obtained results demonstrate the possibility to detect SRI changes by means of single wavelength time delay measurements with enhanced sensitivity in the range 1.33-1.40 with respect to previously reported interrogation techniques.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/LPT.2009.2032780</doi><tpages>3</tpages></addata></record> |
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| source | IEEE |
| subjects | Bragg gratings Delay effects Fiber-optics sensors Fibers Group delay Interrogation interrogation techniques Optical fibers Optical propagation Optical pulses Optical refraction Propagation delay Sensor phenomena and characterization Sensors tilted fiber Bragg gratings (TFBGs) Time delay Time domain analysis Time measurement Wavelength measurement Wavelengths |
| title | Time Delay Measurements as Promising Technique for Tilted Fiber Bragg Grating Sensors Interrogation |
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