Optical device with increased spectral width

The invention is an optical apparatus and method of fabrication wherein an optical device (10) such as a semiconductor laser includes a grating (12) and a waveguide (14) optically coupled to the grating. At least a portion of the waveguide coupled to the grating has a width (W) which varies along th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BACHER, KENNETH L, HUANG, SUN-YUAN, CHO, SI HIUNG, CROSSLEY DAUTREMONT-SMITH, WILLIAM
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS 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 DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The invention is an optical apparatus and method of fabrication wherein an optical device (10) such as a semiconductor laser includes a grating (12) and a waveguide (14) optically coupled to the grating. At least a portion of the waveguide coupled to the grating has a width (W) which varies along the length (Z) of the waveguide in such a manner as to broaden the spectral line width of light output from the device. The width can be varied according to linear, sinusoidal or saw-tooth functions. A broadened line width permits pumping of a Raman amplifier at a high power without inducing any significant Brillouin Scattering.