574-647 nm wavelength tuning by second-harmonic generation from diode-pumped PPKTP waveguides

K.A. Fedorova*, G.S. Sokolovskii, P.R. Battle, D.A. Livshits, E.U. Rafailov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present a compact, all-room-temperature continuous-wave laser source in the visible spectral region between 574 and 647 nm by frequency doubling of a broadly tunable InAs/GaAs quantum-dot external-cavity diode laser in a periodically poled potassium titanyl phosphate crystal containing three waveguides with different cross-sectional areas (4 × 4, 3 × 5, and 2 μm × 6 μm). The influence of a waveguide's design on tunability, output power, and mode distribution of second-harmonic generated light, as well as possibilities to increase the conversion efficiency via an optimization of a waveguide's cross-sectional area, was systematically investigated. A maximum output power of 12.04 mW with a conversion efficiency of 10.29% at 605.6 nm was demonstrated in the wider waveguide with the cross-sectional area of 4 μm × 4 μm.

Original languageEnglish
Pages (from-to)835-838
Number of pages4
JournalOptics Letters
Issue number5
Early online date27 Feb 2015
Publication statusPublished - 1 Mar 2015

Bibliographical note

Funding: EU FP7 program through the FAST-DOT project (contract no. 224338) and RFBR grant no. 14-02-01160.


  • harmonic generation and mixing
  • waveguides
  • semiconductor lasers
  • tunable lasers
  • visible lasers
  • devices nonlinear optics


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