A novel intracavity lens design for compact and high efficiency tapered laser diode

F. K. Lau, C. W. Tee, R. V. Penty, I. H. White, N. Michel, M. Krakowski

Research output: Contribution to journalArticle


An integrated parabolic lens capable of introducing a diverging effect to the optical mode propagating within the cavity of a tapered laser is proposed and demonstrated. This idea allows broader high-power beams to be generated by shorter cavities. Diverging lenses with etch depths of 0.13 and 0.27 μm are implemented, with 12 (9.5%) and 16.8 μm(13.3%) overall broadening of the near-fields widths measured at 1/e2 intensity. The peak output power as well as the threshold current is found to increase following the lens etching process, confirming the beneficial broadening effect introduced by the diverging lens.

Original languageEnglish
Pages (from-to)203-205
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
Publication statusPublished - 15 Feb 2007


  • Beam quality
  • Catastrophic optical mirror damage (COMD)
  • Diverging lens
  • Gaussian beam
  • High-brightness lasers
  • High-power lasers
  • Integrated lens
  • M factor
  • Mode expansion
  • Tapered lasers

ASJC Scopus subject areas

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

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