Study Of Local Effects In The Pwg In The Glass-ceramic

Studies of red to b1ue up--conversion 1aser pumped by redsemiconductor 1aser are important for the deve1opments ofphoto--e1ectronics. PWG g1ass ceramics doped with rare-earth ions are attract ive because they are good up--conversion. -luminescence materla1s. In addition, they show a hightransparency from the UV to the IR and relative1yconcentrat ions of triva1ent rare earth ions can be introducedinto the matrices. This kind of materia1s can be used intosome important fie1ds of photo--e1ectronics on future, 0ne ofstudied prob1ems is main1y focused on deve1opment of.luminescence efficiency assoc iated with phonon and thestructure of the host. These prob1ems of matrices vibrationand phone must be thought for this fie1d and all so1id fie1ds,witch act on some importance on a11 fie1ds of solid physics.Some propert ies of 1ocated modes have are studied in PWGg1ass ceramics doped and undoped by Yb3+ and Tm3+ions by Ramanspectra. Fo1lowing by these main resu1ts:1. It was found that 1ocated e1ectric fie1d is generated afterYbs+and Tm3+ions are doped into PWG, witch resu1ts in aconsistence of crysta11ine direct ions of microcrysta1 inPWG. The co--operation of Yb3+and Tm3+ ions makes Raman.vibrationa1 modes from PWG to narrow with specialc o nc e nt rat i o n.2. The interactions of W03 in PWG with water indicate that theW0a unit has a stab1e three--dimension structure.3. A new phase transition of 4#PWG: Yb'+, Tm3+ of an order--disorder.type, at hi gh temperature about 315'C, was found. Moreover,Qn the basis of the temperature dependence of Raman intensity,. ta compari son was made with respect to PWG undoped: It was foundthat these structura1 uni ts associated wi th Yb3+ and Tm3+are1ack of the anoma1ous compress ibi 1 ity.