OPTICAL APPARATUS

In a known arrangement of the said type, there are arranged in the beam path of the laser radiation two optical lenses and an optical isolator which consists of a Faraday rotator and at least one polariser. The lens arranged nearer the semiconductor laser is a component of the Faraday rotator and co...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	EKEHARUTO KUREMENTO, URURITSUHI DEZERUNO, FURANTSU MAIYAAHOOFUAA, KARUSUTEN DOREGEMIYURAA
Format:	Patent
Sprache:	eng
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	In a known arrangement of the said type, there are arranged in the beam path of the laser radiation two optical lenses and an optical isolator which consists of a Faraday rotator and at least one polariser. The lens arranged nearer the semiconductor laser is a component of the Faraday rotator and consists of a spherical lens made from YIG. The tolerances of this lens are favourable neither for a high launching efficiency nor for a high blocking attenuation. The new arrangement is intended to improve this state of affairs. In the new arrangement, it is not the lens (3) situated nearer the semiconductor laser, but the lens (4) further removed from it which is a component of the Faraday rotator (6). It preferably consists of a plano-convex lens whose convex side (40) faces the semiconductor laser (1). Arrangement for launching the laser radiation of a semiconductor laser into a monomode fibre.