Realization of high-power highly efficient GaInP/AlGaInP ridge laser diodes for recordable/rewritable digital versatile discs

Byungjin Ma, Soohaeng Cho, Changyun Lee, Sangbum Lee, Joonseok Kang, Bumjoon Kim, Donghoon Kang, Youngchul Shin, Youngmin Kim, Tae Geun Kim, Yongjo Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Very efficient and reliable GaInP/AlGaInP red multiple-quantum-well laser diodes for recordable/rewritable digital versatile disc (DVD-R/RW) were successfully developed by low-damage fabrication. Because we adopted dry etching instead of conventional chemical wet etching for the steep ridge sidewalls of laser diodes (LDs), devices could be operated at a high output power over 200 mW at 70°C without showing any unstable higher-order transverse modes. In-situ monitoring tools in metal organic chemical vapor deposition (MOCVD) and dry etching were useful for controlling process parameters precisely, which enhances device characteristics and maintains the reproducibility of device fabrication. A very small beam aspect ratio of 1.78 with a very low vertical beam divergence angle of 15.3° at a high output power was achieved by optimizing the two-step n-cladding layer in our LD structures. These low values of the vertical beam divergence angle and aspect ratio are essential for minimizing the coupling loss between the LD and the objective lens in DVD pickups.

Original languageEnglish
Pages (from-to)774-777
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number2 A
DOIs
Publication statusPublished - 2006 Feb 8

Keywords

  • 660 nm
  • AlGaInP
  • Aspect ratio
  • Beam divergence angle
  • DVD-R/RW
  • High power
  • LD

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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