High germanium content wavequide materials also containing titanium

The core and/or cladding of the waveguide is made from silica germania titania glass. The glass has molar ratios Ge/ (Si + Ge + Ti) = 0.08-0.17 and Ti/ (Si + Ge + Ti) = greater than naught to 0.08, and preferably a refractive index = 1.48-1.52 at 1550 nm and coefficient of thermal expansion at room...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	ROBERT ALAN BELLMAN, IKERIONWU ASIEGBU AKWANI, LYNN BERNARD SIMPSON
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The core and/or cladding of the waveguide is made from silica germania titania glass. The glass has molar ratios Ge/ (Si + Ge + Ti) = 0.08-0.17 and Ti/ (Si + Ge + Ti) = greater than naught to 0.08, and preferably a refractive index = 1.48-1.52 at 1550 nm and coefficient of thermal expansion at room temperature = 3 x 10 -4.4 x 10 {C. The refractive index of the core layer is higher than the refractive index of the cladding layer. The layers are deposited by plasma enhanced chemical vapour deposition. The wave guides are used in liquid crystal based cross-connect optical switching devices.