Effect of crystal thickness of separate confinement heterostructure layers on 1.55-μm loss-coupled dfb laser characteristics

Jae Ho Han, Sung Woong Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We investigated the effect of the crystal thickness of the separate confinement heterostructure (SCH) guiding layers on the characteristics (threshold current, quantum efficiency) of 1550-nm loss-coupled Distributed Feedback laser diode fabricated with a simple step growth having an automatically buried absorptive grating InAsP layer. By increasing the thickness of SCH crystal layers from 40-nm to 80-nm in both below and above the multi-quantum well region, we could achieve lower threshold currents both in 25°C and 85°C with increased ratio of quantum efficiencies between two temperatures.

Original languageEnglish
Pages (from-to)707-712
Number of pages6
JournalCrystal Research and Technology
Volume42
Issue number7
DOIs
Publication statusPublished - 2007 Jul
Externally publishedYes

Keywords

  • Distributed feedback lasers
  • Heterostructure
  • Quantum well lasers
  • Semiconductor lasers

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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