Multi-wavelength switchable fibre ring laser based on polarisation selective tilted fibre gratings capable of strain and temperature sensing


Using three fibre gratings with excessively tilted structures in the cavity, we have experimentally demonstrated a multiwavelength switchable erbium-doped fibre ring laser system. The three tilted gratings act as in-fibre polariser and polarisation dependent loss filters to induce the polarisation hole burning effect in the cavity for the operation of the laser at single, double, triple and quadruple wavelengths. The laser system has demonstrated good stability under room temperature conditions and also achieved a high degree of polarization (~30dB), high optical signal to noise ratio (up to 63dB) and high side mode suppression (~50dB). The system has also been investigated for temperature and strain sensing by subjecting the seeding fibre Bragg gratings (FBG) to temperature and strain variations. Since the loss band of the polarisation dependent loss filter is broader than the bandwidth of the seeding FBG, the laser output shifts in wavelength with the applied temperature and strain. The fibre ring laser has shown good responses to the temperature and strain, providing sensitivities of approximately 11.7 pm/°C and 0.85pm/µe respectively.

Additional Information: Pouneh Saffari ; Chengbo Mou ; Hongyan Fu ; Lin Zhang and Ian Bennion "Multi-wavelength switchable fibre ring laser based on polarisation selective tilted fibre gratings capable of strain and temperature sensing", Francesco Baldini ; Jiri Homola ; and Robert A. Lieberman (eds), Proc. SPIE 7356, Optical Sensors 2009, 73561S (May 18, 2009). Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Event Title: Oral presentation at SPIE Europe Optics and Optoelectronics
Event Type: Other
Event Location: Prague
Event Dates: 2009-04-20 - 2009-04-23
Uncontrolled Keywords: photonics, fibre gratings, Computer Science Applications, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Applied Mathematics, Condensed Matter Physics
ISBN: 978-0-8194-7630-2
Published Date: 2009-05-18
Authors: Saffari, Pouneh
Mou, Chengbo
Fu, Hongyan
Zhang, Lin
Bennion, Ian


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