Tapered Waveguide InGaAs/InGaAsP Multiple-Quantum-Well Lasers

T. L. Koch, U. Koren, G. Eisenstein, M. G. Young, M. Oron, C. R. Giles, B. I. Miller

Research output: Contribution to journalArticle

149 Scopus citations


We propose and demonstrate the application of ultra-thin etch-stop fabrication techniques to adiabatically expand the vertical optical mode size in 1.5 µm InGaAs/InGaAsP MQW lasers using a tapered-core passive intracavity waveguide structure. We achieve 30% differential quantum efficiency out the tapered facet, far-field FWHM of ~ 12°, and a butt-coupling efficiency into a cleaved fiber of -4.2 dB, with -1 dB alignment tolerances of ~ ± 3 ¼m.

Original languageEnglish (US)
Pages (from-to)88-90
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number2
StatePublished - Feb 1990
Externally publishedYes

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Tapered Waveguide InGaAs/InGaAsP Multiple-Quantum-Well Lasers'. Together they form a unique fingerprint.

  • Cite this

    Koch, T. L., Koren, U., Eisenstein, G., Young, M. G., Oron, M., Giles, C. R., & Miller, B. I. (1990). Tapered Waveguide InGaAs/InGaAsP Multiple-Quantum-Well Lasers. IEEE Photonics Technology Letters, 2(2), 88-90. https://doi.org/10.1109/68.47056