Short-Cavity Distributed Bragg Reflector Laser with an Integrated Tapered Output Waveguide

M. Chien, U. Koren, T. L. Koch, B. I. Miller, M. Oron, J. L. Young, M. G. Demiguel

Research output: Contribution to journalArticle

26 Scopus citations


We demonstrate a distributed Bragg reflector strained-layer multiple-quantum-well laser at 1.5 μm wavelength with an integrated tapered waveguide beam expander. The far-field’s in the lateral and vertical directions are 10 and 15°, respectively. A quantum efficiency of 17% out the tapered facet was measured with a corresponding threshold current of 28 mA. The alignment tolerances for coupling into a cleaved single-mode fiber are 9.5 and 7.5 μm FWHM in the lateral and vertical directions, respectively. We obtained a 3-dB improvement for single-mode fiber coupling using a SELFOC lens.

Original languageEnglish (US)
Pages (from-to)418-420
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number5
StatePublished - May 1 1991
Externally publishedYes


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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