Asymmetry in Output Power of InGaAsP/InP DFB Lasers

Shigeyuki Akiba*, Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The output powers from the two ends of a DFB region were compared. The power ratios and the external differential quantum efficiencies of the lowest-threshold modes were calculated in detail for an asymmetric end structure, one end being a cleaved facet and the other end being non-reflective. Power ratios of 2–5, depending on the corrugation phase at the cleaved facet, were predicted for KL=2–3. Such large ratios were actually estimated experimentally in InGaAsP/InP DFB lasers with a window region at one end. A larger output from a window region may be useful if the window region length is restricted, to about 10 µm or less in this case. The asymmetric output power in an FP-type DFB laser was also demonstrated.

Original languageEnglish
Pages (from-to)1054-1059
Number of pages6
JournalJapanese journal of applied physics
Issue number8 R
Publication statusPublished - 1984 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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