Ridge laser with spot-size converter in a single epitaxial step for high coupling efficiency to single-mode fibers

1 September 1998

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters

Vol. 10 (9) , 1235-1237
https://doi.org/10.1109/68.705601

Abstract

We report on a 1.55-/spl mu/m InGaAsP MQW laser diode with an integrated spot-size converter fabricated in a single epitaxial step using conventional photolithography. The laser structure uses a conventional ridge guide for the active layers and a second larger ridge for the passive waveguide. Low-beam divergence of typically 9/spl deg//spl times/9/spl deg/ results in about 3-dB coupling losses, with a cleaved optical fiber.

Keywords

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