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Vol. 116, Issue 5, May 2010, pp. 112-121




Transverse Micro-structuring of Photonic Crystal Fibers for Industrial Sensors and Side Viewing Probes

for Optical Coherence Tomography Applications


Sanjay KHER, Manoj Kumar SAXENA, Smita CHAUBE, 1Amit KESKAR, 2Subhashish TIWARI, S. M. OAK

Fiber Optics Lab, SSLD, RRCAT, Indore-452013, India

Tel.: +91-731-2442325, fax: +91-731-2442300

1School of Instrumentation, DAVV, Indore

2Department of applied Physics, SGSITS, Indore

E-mail: kher@rrcat.gov.in



Received: 24 February 2010   /Accepted: 24 May 2010   /Published: 31 May 2010


Abstract: In this work, we report a simple and easily adaptable technique of lateral micro-machining of Photonic Crystal fibers (PCFs) using modulated CO2-laser in conjunction with electrical arc system. The technique is controlled, convenient and precise over wide dimensions (50-250 mm). Lateral access to the holes of PCF provides additional flexibility for sensitive real time detection of gases such as green-house gases. Long period gratings are made in PCF through inscription of micro-grooves for sensitive detection of longitudinal strain. A unique and versatile PCF based probe for possible endoscopic Optical Coherence Tomography (OCT) applications is reported.


Keywords: Micro-machining, CO2 laser, Lateral access, Optical coherence tomography, Micro-grooves


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