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Integrated optical 4*4 star coupler on LiNbO3

: Heidrich, H.; Hoffmann, D.; Doldissen, W.; Klug, M.

	Electronics Letters 20 (1984), Nr.25-26, S.1058-9 ISSN: 0013-5194

	Englisch
	Zeitschriftenaufsatz
	Fraunhofer HHI ()
	integrated optics; lithium compounds; optical communication equipment; optical couplers; optical fibres; optical waveguides; titanium; less than 4.2 db excess loss; low-loss type; passive planar configuration; te mode; single-mode operation; optical communication devices; 4*4 star coupler; x-cut; z-propagation; tm polarised light; linbo3

Abstract
A novel low-loss passive planar 4*4 star coupler consisting of four interconnected 3 dB couplers was fabricated on X-cut LiNbO3:Ti using Z-propagation. Almost even distribution was achieved for both TE and TM polarised light incident on any of the four inputs. Excess loss including fibre coupling was <4.2 dB.

: http://publica.fraunhofer.de/dokumente/N-14073.html