Organic/Inorganic Hybrid Glasses Doped with (Erbium-ions/CdSe) Nanoparticles for Laser Amplifications
- PDF / 645,111 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 13 Downloads / 162 Views
1015-BB03-11
Organic/Inorganic Hybrid Glasses Doped with (Erbium-ions/CdSe) Nanoparticles for Laser Amplifications Kyung Choi Nanotechnology, Bell Labs., Lucent Technologies, 600-700 Mountain Ave, Murray Hill, NJ, 07974 Hybrid organic/inorganic silicate materials are employed to incorporate rare-earth metal ions for laser amplification applications. Performance of laser amplifiers doped with rareearth ions significantly relies on glassy hosts. We designed and synthesized highly fluorinated glassy hosts doped with biphase of Er3+/CdSe nano-particles. Fluoroalkylenebridged xerogels containing Er3+-ions show low absorptions at the 1540 nm in this study. The presence of CdSe nano-particles also significantly influences the fluorescence environment of Er3+-ions in the fluorinated glassy matrices.
INTRODUCTION Rare-earth doped optical materials have been widely investigated for photonic amplifiers. 1-3 Since erbium exhibits a strong fluorescence at 1540 nm, which is useful in optical amplifications, there are a lot of researches in Er3+-ions doped optical devices based on such as silicate glasses, inorganics, organic polymers, lithium niobate, and organic/ inorganic hybrid glasses for amplifications. 4-9 Enhanced performance of optical amplifiers can be achieved by achieving low optical losses and low phonon energies. Planar waveguides and fibers doped with rare-earthions are the most interesting study for the next generation of advanced optical devices. Due to compatibility with other optical devices based on silicate hosts, silicate-based fibers and planar waveguide amplifiers have been widely studied. However, silica-based amplifiers often fail to achieve high lasing performance due to a strong absorption raised from the OH-group at 1540 nm. The low solubility of erbium-ions in glassy mediums also limits the performance in lasing tasks. Sol-gel approaches are uesful for facile controls of the chemical environments of rareearth ions and also to incorporate rare-earth ions into matrices without significant phase separations. For this reason, organic/inorganic hybrid glasses have been widely used as alternatives to conventional silicate materials. Hybrid materials retain original properties of the individual components. Also, their resulting properties significantly affect by the characteristics and sizes of each organic fragement. For optical applications, desired optical properties of hybrid materials can be achieved by incorporating functional organic fragments between inorganic oxide components (Figure 1). We thus can create new optical properties by inserting different types and sizes of organic spacers.10-14
As illustrated in Figure 1, hybrid materials can range, depending on domain sizes, from physical mixtures of inorganic oxides and organics to molecular composites that utilize chemical linkages between the organic and inorganic components at the molecular scale. Hybrid sol-gel processable monomers are often microscopically homogeneous with uniform distribution of the organic spacers.14
Hybrid Materials Orga
Data Loading...
