Journal: IEEE Photonics Technology Letters
Paper: Stabilization of Dual-Wavelength Erbium-Doped Fbier Ring Lasers by Single-Mode Operation

AUTHORS: M. Angeles Quintela, Rosa Ana Perez-Herrera, Irene Canales, Monserrat Fernández-Vallejo, Manuel López-Amo
Abstracts:
In this work, a novel single-longitudinal-mode (SLM) dual-wavelength laser configuration is proposed and demonstrated. This laser is based on ring resonators, and employs fiber Bragg gratings to select the operation wavelengths. It includes a short piece of highly doped Er-fiber that acts as the active medium. The stable SLM operation is guaranteed when the two lasing channels present similar output powers. This behavior is shown for different pump powers.

Journal: Microwave and Optical Technology Letters
Paper: Brillouin gain spectrum tailorning technique by using fiber concatenation and train for fiber devices

AUTHORS: C.A. Galíndez, A. Ullan, F.J. Madruga, J.M. López-Higuera
Abtracts:
A technique to develop all-fiber devices based on the customization of Brillouin gain spectrum is proposed in this article. It is based on the proper concatenation and elongation of optical fibers. To check experimentally the proposed technique, an optical device with a ‘‘like W’’ stimulated Brillouin scattering shape was implemented. Our experiment shows a 3-dB bandwidth of 219 MHz with two reject bands placed at 10.7855 and 10.876 GHz, respectively, from the pump wavelength. Optical devices such as Brillouin amplifiers or Brillouin filters can be developed using the proposed technique. VC 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 787–790, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25033

Journal: Microwave and Optical Technology Letters
Paper: Brillouin gain spectrum tailorning technique by using fiber concatenation and train for fiber devices

AUTHORS: C.A. Galíndez, A. Ullan, F.J. Madruga, J.M. López-Higuera
Abtracts:
A technique to develop all-fiber devices based on the customization of Brillouin gain spectrum is proposed in this article. It is based on the proper concatenation and elongation of optical fibers. To check experimentally the proposed technique, an optical device with a ‘‘like W’’ stimulated Brillouin scattering shape was implemented. Our experiment shows a 3-dB bandwidth of 219 MHz with two reject bands placed at 10.7855 and 10.876 GHz, respectively, from the pump wavelength. Optical devices such as Brillouin amplifiers or Brillouin filters can be developed using the proposed technique. VC 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 787–790, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25033

Journal: Optics Letters
Paper: Brillouin frequency shift of standard optical fibers set in water vapor medium

AUTHORS: Carlos Galindez, Francisco J. Madruga, Jose M. Lopez-Higuera
Abstracts: The dependence of the Brillouin frequency shift (BFS) on UV-cured acrylate coating and uncoated fibers for media that have different water vapor concentrations is experimentally investigated. The BFS is proportional to the temperature within the fiber, but it also depends on the water vapor contained in the surroundings of the fiber. A hypothesis based on the efficiency of the heat transfer due to the different humidity concentration in the media is proposed, and the temperature difference that depends on the heat transfer is quantified in standard fibers. A shift of 0.22 MHz for relative humidity change between 60% and 98% at 20°C is measured