Study of fiber laser micro-nano sensor based on colloidal crystal
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Abstract:
A fiber laser micro-nano sensor based on colloidal crystal structure is proposed in this paper. The fiber laser has stable frequency and narrow linewidth. It is realized by using an unpumped erbium-doped fiber (EDF) as the saturable absorber. The saturable absorber possesses the shape of taper. The laser threshold can be effectively reduced by the tapered saturable absorber. The tapered fiber coated with colloidal crystal as sensing unit is studied. The concentration of ethanol can be obtained from the detection of the output laser wavelength. It can be extensively used in chemical, medical and biological detections.
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Project Supported:
the Transformation and Industrialization of Scientific and Technological Achievements(Nos.PXM2013_014224_000077 and PXM2012_014224_000019);the School Fund of Beijing Information Science&Technology University(No.1225006);the Open Foundation of Beijing Engineering Research Center for Optoelectronic Information and Instrument(No.GD20120010)
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