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Wavelength control with grating imprinted fiber Sagnac loop mirror by polarization and strain tuning

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3 Author(s)
Lu, Ping ; Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John’s, Newfoundland A1B 3X7, Canada ; Liqiu Men ; Chen, Qiying

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Wavelength control by the use of fiber Bragg grating (FBG) imprinted polarization maintaining fiber (PMF) Sagnac loop mirror (SLM) is proposed and demonstrated through polarization and strain tuning. The Bragg wavelengths of the FBG in the PMF along slow or fast axis show redshifts with the increase in strain with sensitivities of 8.77×10-4 and 9.11×10-4 nm/με, respectively, whereas the interferometric peak wavelength of the SLM exhibits a blueshift with a sensitivity of 1.9437×10-2 nm/με for the peak with an order number of 420. The opposite strain sensitivities and the pronounced difference in the bandwidth of the FBG resonance peak and that of the SLM, together with the controllability on the wavelength spacing of the SLM neighboring transmission maxima, provide a variety of alternatives to realize wavelength tuning for many practical applications.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 1 )