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Martinez-Rios A.,Optical Sensors and Microdevices Group | Anzueto-Sanchez G.,Autonomous University of the State of Morelos | Monzon-Hernandez D.,Optical Sensors and Microdevices Group | Salceda-Delgado G.,Optical Sensors and Microdevices Group | Castrellon-Uribe J.,Autonomous University of the State of Morelos
Optics and Laser Technology | Year: 2014

Multiwavelength Erbium-doped fiber ring lasers using two fiber filters inserted into the laser cavity is reported. The first fiber comb filter is a Mach-Zender interferometer consisting of two concatenated fiber tapers whose transmission bands determine the lasing wavelengths. The second filter is a tapered fiber which acts as a broadband fiber filter that reshapes the Erbium-doped fiber gain spectrum, and can be tuned by S-bending. Both filters are fabricated on the same fiber thus providing a cheap and very simple method to obtain tunable multiwavelength laser generation. © 2013 Published by Elsevier Ltd.


Hernandez-Serrano A.I.,Optical Sensors and Microdevices Group | Salceda-Delgado G.,Optical Sensors and Microdevices Group | Moreno-Hernandez D.,Optical Sensors and Microdevices Group | Martinez-Rios A.,Optical Sensors and Microdevices Group | Monzon-Hernandez D.,Optical Sensors and Microdevices Group
Optics and Lasers in Engineering | Year: 2013

A simple technique for sensing the acoustic vibration of a cantilever beam, using a single-fiber Mach-Zehnder interferometer, is presented. The interferometer consists of two concatenated low-loss fused fiber tapers, with a waist diameter of 60 μm, separated by an un-tapered fiber section of 10 mm length. The interferometer transmitted signal is modulated when the device is bent under the presence of an external acoustic signal. The optical fiber device glued directly on a metallic cantilever beam is capable of measuring frequency of the resonant modes. The interrogation set-up is simple consisting of a single tunable diode laser and a photodetector. The measured frequencies of the resonating modes agree with the numerical results obtained by the Finite Element Method. © 2013 Elsevier Ltd.

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