EML based on side-wall grating and identical epitaxial layer scheme

Lianping Hou, Mingming Tan, Mohsin Haji, Iain Eddie, John H. Marsh

Research output: Contribution to journalArticlepeer-review


We, for the first time, present electroabsorption modulator lasers based on side-wall gratings and the identical epitaxial layer scheme using very simple fabrication processes. The devices show stable single-mode operation with little mode-hopping and a side mode suppression ratio of more than 45 dB, which is maintained until the applied current exceeds 6 times that of the threshold value. The drive voltage required to obtain a 12-dB extinction ratio is-2V. The devices can be operated with a 3-dB bandwidth of 7 GHz allowing for error-free large signal modulation at 5 Gb/s with a dynamic extinction ratio of 11 dB.

Original languageEnglish
Article number6514055
Pages (from-to)1169-1172
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number12
Publication statusPublished - 14 Jun 2013


  • Distributed feedback (DFB) laser
  • electroabsorption modulator (EAM)
  • electroabsorption modulator integrated DBF laser (EML)
  • high extinction ratio (ER)
  • integrated laser modulator (ILM)
  • low drive voltage


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