Tapered waveguide InGaAs/InGaAsP multiple-quantum-well lasers

Thomas 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


The use of ultrathin etch-shop techniques to expand the vertical optical mode size adiabatically in 1.5-μm InGaAs/InGaAsP MQW lasers using a tapered-core passive intracavity waveguide structure is discussed. 30% differential quantum efficiency out the tapered facet, far-field FWHM of approximately 12° and a butt-coupling efficiency into a cleaved fiber of -4.2 dB, with -1-dB alignment tolerances of approximately ±3 μm, were achieved.

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


ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)
  • Atomic and Molecular Physics, and Optics

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