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Integration of polarisation independent mode transformers with uncladded InGaAsP/InP rib waveguides

: Albrecht, P.; Heidrich, H.; Löffler, R.; Mörl, L.; Reier, F.; Weinert, C.M.

DOI: 10.1049/el:19960769

	Electronics Letters 32 (1996), Nr.13, S.1196-1198 ISSN: 0013-5194

	Englisch
	Zeitschriftenaufsatz
	Fraunhofer HHI ()
	gallium arsenide; iii-v semiconductors; indium compounds; integrated optics; optical fibre couplers; optical fibre losses; rib waveguides; polarisation independent mode transformers; uncladded rib waveguides; core thickness tapering; pics; coupling loss; flat-end fibres; alignment tolerances; excess loss; 2.1 to 2.5 db; 1 db; InGaAs-InP

Abstract
Polarisation independent mode transformers were fabricated by core thickness tapering in uncladded InGaAsP/InP rib waveguides intended for integration into PICs. No epitaxial regrowth is needed. The coupling loss for flat-end fibres is reduced to (2.3+or-0.2) dB at alignment tolerances of >+or-2.4 mu m for 1 dB excess loss.

: http://publica.fraunhofer.de/dokumente/N-13339.html