Polarization-controlled single-mode VCSEL

Takashi Yoshikawa, Takeshi Kawakami, Hideaki Saito, Hideo Kosaka, Mikiyasu Kajita, Kaori Kurihara, Yoshimasa Sugimoto, Kenichi Kasahara

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Relative intensity noise (RIN) in a vertical-cavity surface-emitting laser (VCSEL) was greatly reduced through the use of polarization control to eliminate competition between two orthogonal polarization states by ensuring there was only one polarization state. Polarization was stable with optical feedback of up to 10%. Polarization control was achieved by inducing a small loss anisotropy in fundamental transversal mode VCSEL's. Anisotropic post structures, such as a rectangular post, an oblique post, or a zigzag-sidewall post, were found to be effective in creating loss anisotropy without serious degradation of other VCSEL characteristics such as light-output power or beam profile.

Original languageEnglish
Pages (from-to)1009-1014
Number of pages6
JournalIEEE Journal of Quantum Electronics
Issue number6
Publication statusPublished - 1998 Jun
Externally publishedYes


  • Laser diode
  • Polarization
  • RIN
  • Scattering loss
  • Single mode

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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