High Efficiency 1.3μm Superluminescent Diode with Absorbing Tapered Waveguide

K. Magari, Y. Hoguchi, K. Okamoto, H. Yasaka, H. Nagai, O. Mikami

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A new type of superluminescent diode (SLD) with a tapered waveguide in the absorbing region is proposed. This SLD structure quite suitably monitors output power, as it emits monitor light from the rear facet that is about one-tenth the output power from the front one. Device parameters have been determined by beam propagation methods. A 1.3μm SLD fabricated by liquid phase epitaxy (LPE) with an absorbing waveguide 200μm long and with a 6.5° tapered angle can emit output power of 13.5 mW from the front facet at a 200 mA driving current without lasing.

Original languageEnglish
Pages (from-to)1445-1446
Number of pages2
JournalElectronics Letters
Issue number18
Publication statusPublished - 1990 Jan


  • Luminescent devices
  • Semiconductor devices and materials
  • Waveguides


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