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Oxide Glasses for Holographic Data Storage
Gaë,l Poirier,Marcelo Nalin,Sidney J,L Ribeiro,Younes Messaddeq 한국세라믹학회 2007 세라미스트 Vol.10 No.3
Novel photochromic oxide glasses are presented in this section. These glasses are based on phosphate formers containing both tungsten and antimony atoms. Exposure to visible continuous or pulsed laser beam results in an intense photochromic effect witch is shown to occur in the volume of the glass and results in a broad absorption band in the visible and near infrared. This effect was not identified to be related with a sσuctural change and is assumed to be entirely electronic. A change in the absorption coefficient is observed in function of tungsten content, exposure time and increases with beam power. These glasses have been investigated regarding the possibilty of holographic data storage using visible lasers sources. Changes in both refractive index and the absorption coefficient were measured using a holographic setup. The modulation of the optical constants is reversible by heat treatment.
Huang, Bin,Chen, Haoshuo,Fontaine, Nicolas K.,Jin, Cang,Shang, Kuanping,Ryf, Roland,Essiambre, Rene-Jean,Ung, Bora,Messaddeq, Younes,LaRochelle, Sophie,Li, Guifang IEEE 2017 Journal of Lightwave Technology Vol.35 No.4
<P>We directly measure the spatially and spectrally resolved gain of erbium doped multicore and few mode fiber amplifiers using a coherent swept wavelength interferometer operated in the reflection mode. It greatly simplifies the characterization of multispatial mode amplifiers because it enables characterization of the mode-dependent gain with only a single mode-selective multiplexer at the input. The gains for both multicore fiber amplifier and three spatial modes (LP<SUB>01</SUB> and <TEX>${\rm{LP}}_{{11}}$</TEX>) amplifier are measured. Measurements for multicore fiber amplifier are conducted using two pump schemes, core pump and cladding pump. Also, the comparison with the cutback experiments shows the validity of this technique.</P>
Demonstration of Cladding-Pumped Six-Core Erbium-Doped Fiber Amplifier
Haoshuo Chen,Fontaine, Nicolas K.,Ryf, Roland,Cang Jin,Bin Huang,Kuanping Shang,Essiambre, Rene-Jean,Lixian Wang,Hayashi, Tetsuya,Nagashima, Takuji,Sasaki, Takashi,Messaddeq, Younes,LaRochelle, Sophie IEEE 2016 Journal of Lightwave Technology Vol.34 No.8
<P>We demonstrate cladding-pumped six-core Erbium-doped fiber amplifiers (EDFAs) using two different pump coupling schemes: edge-coupled and side-coupled pumping, where a single multimode laser diode can be applied to pump all cores. Using two in-line cladding-pumped EDFAs at the input and output of a 31-km coupled-six-core fiber, we realized 465-km space-division multiplexing and wavelength division multiplexing transmission in a recirculating loop and achieved a spectral efficiency of 18 bits/s/Hz. Through side-coupled pumping, the cladding-pumped six-core EDFA produced >18-dBm output power per core and had <;6-dB noise figure across the C-band.</P>