Theoretical study on intra-cavity distributed-bragg-reflection quasi-phase-matched second-harmonic lasers

Kenchi Ito, Kazumi Kawamoto, Hiroshi Momiji

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The characteristics of intra-cavity distributed Bragg reflector (DBR) quasi-phase-matched (IDQPM) second-harmonic-generation (SHG) lasers are theoretically studied. In the IDQPM-SHG laser, a QPM device and a DBR for feedback are separately fabricated on the same substrate with the QPM device placed between the DBR and a semiconductor laser. The threshold current of the IDQPM-SHG laser depends on the coupling efficiency between the laser diode and the QPM waveguide and the reflectivity of the DBR. The SH output of the IDQPM-SHG laser is strongly dependent on the generalized SHG conversion efficiency, κ. This laser has the potential to attain an SH output over a 30-mW using a currently available 50-mW semiconductor laser for the fundamental light source, when highly efficient QPM device (κ=2.2 W-1) is used. Its tolerance for various deviations from the initial design and the problems to develop a commercially available IDQPM-SHG laser are also discussed.

Original languageEnglish
Pages (from-to)371-376
Number of pages6
JournalOptical Review
Issue number5
Publication statusPublished - 1995 Jan 1


  • distributed Bragg reflector (DBR)
  • intra-cavity
  • quasi-phase-matching (QPM)
  • second harmonic generation (SHG)
  • waveguide

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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