Synthesis and Characterization of Near-infrared Luminescent Materials Containing Erbium and Ytterbium for Organic Waveguide Amplifier

Synthesis and Characterization of Near-infrared Luminescent Materials Containing Erbium and Ytterbium for Organic Waveguide Amplifier
　　Human society is entering into an information age driven by the rapid development of technologies in areas of microelectronics, optoelectronics, computer and communications. The demands of rapid increase in information make the communication system continuously develop to high speed, big capacity and low cost. The propagation and switching speed of signals in the traditional electronic domain are inherently limited. The optical signal has a more rapid switching and modulating speed, and the photonics and optoelectronics have become research hotspot in recent years. Optical fiber telecommunication technology, depending on its tremendous and potential bandwidth resource, has become one Ball Neodymium Magnets of the important technology to support the development of communication services.All optical communication networks will benefit to realize digital communication of high speed and large capacity, and to realize“information superhighway”in the world. Amplifier whose function is to compensate the signal losses is a key device of the optical fiber communication network. Optical amplifier directly boosts up an optical signal without any conversion of the light into an electrical signal. And optical amplifying technology has become the most effective method to compensate losses. This technology which is the key to all optical communication is a revolution in the history of the fiber communication. Erbium doped fiber amplifier (EDFA) and semiconductor optical amplifier (SOA) have been successfully applied to the long-distance fiber communication. For the short-distance communication, such as local/metro networks, and especially fiber to the home (FTTH) and fiber to the curb (FTTC), a kind of medium gain, mini-volume and easy-set amplifier is urgently needed. And optical waveguide amplifier is just the amplifier which meets these demands.
　　The optical waveguide amplifiers in the 1.55μm region are mainly made of Er-doping inorganic phosphate and silicate glasses, and have already commercialized. However, the fabrication process is complex and integrating with other photonics devices is very difficult. Compared with conventional inorganic waveguide materials, polymer waveguide materials have advantages in easy process, controllable refractive index and easy integration etc.In this paper, we synthesized near-infrared luminescent erbium and ytterbium bonding-type organic complexes. Bonding-type organic complexes have been prepared and determined by FT-IR, UV-Vis-NIR spectrum, the polymeric reactivity groups(–C=C) were introduced into the formula structure of complexes. And the complexes are able to polymerize with monomer. An intense near-infrared emission at wavelength of 1.53μm was observed under the excitation of a 976nm laser light at room temperature. It has been proved that the introduction of http://www.chinamagnets.biz/  ytterbium ion could improve the PL intensity. And 1:3 is the proper molar scale of Er:Yb. Dibenzoyl methane is soluble which makes the complexes have good solubility. Through DSC and TGA analyses, the rare earth complexes show high decompound temperatures, which indicated a good thermal stability and benefit to bonding with polymer.We have synthesized Er Complex-co-MMA-co-GMA polymer, the copolymer shows excellent film-forming capability and high optical transparency, the near- infrared emission at wavelength of 1.54μm was observed, the full width at half maxium is measured to be about 80nm, this value is larger than those of silica-based glasses.. The refractive index of the copolymer Ball Neodymium Magnets  can be adjusted by doping bisphenol A epoxy. The waveguide device was fabricated by spin-coating films, using aluminum as mask and oxygen reactive ion etching.