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Estimation of waveguide loss of 1.3µm narrow beam lasers fabricated by selective MOCVD

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Abstract

Laser diodes with a narrow and circular output beam are of great importance because they enable us to get high coupling into single mode fiber with a large alignment tolerance. LDs with mode-field-converter (MFC-LD) to increase the optical spot size are intensively investigated [1]-[4]. Monolithically integrated either vertically or laterally tapered waveguide is usually used for MFC. A simple fabrication of integrated vertically tapered waveguide has been reported utilizing selective area epitaxy of QW structure onto the dielectric patterned substrate [3].

© 1996 Optical Society of America

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