75%-Efficiency blue generation from an intracavity PPKTP frequency doubler

R. Le Targat, J. J. Zondy, P. Lemonde

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

We report on a high-efficiency 461 nm blue light conversion from an external cavity-enhanced second-harmonic generation of a 922 nm diode laser with a quasi-phase-matched KTP crystal (PPKTP). By choosing a long crystal (L C = 20 mm) and twice looser focusing (w0 = 43 μm) than the "optimal" one, thermal lensing effects due to the blue power absorption are minimized while still maintaining near-optimal conversion efficiency. A stable blue power of 234 mW with a net conversion efficiency of η = 75% at an input mode-matched power of 310 mW is obtained. The intra-cavity measurements of the conversion efficiency and temperature tuning bandwidth yield an accurate value d33(461 nm) = 15 (±5%) pm/V for KTP and provide a stringent validation of some recently published linear and thermo-optic dispersion data of KTP.

Original languageEnglish
Pages (from-to)471-481
Number of pages11
JournalOptics Communications
Volume247
Issue number4-6
DOIs
Publication statusPublished - Mar 15 2005
Externally publishedYes

Fingerprint

Frequency doublers
Conversion efficiency
Crystals
Harmonic generation
Thermal effects
cavities
thermal lensing
Semiconductor lasers
Optics
Tuning
crystals
Bandwidth
harmonic generations
semiconductor lasers
tuning
optics
bandwidth
Temperature
temperature

Keywords

  • PPKTP
  • Second harmonic generation
  • Strontium
  • Thermal effects

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

75%-Efficiency blue generation from an intracavity PPKTP frequency doubler. / Le Targat, R.; Zondy, J. J.; Lemonde, P.

In: Optics Communications, Vol. 247, No. 4-6, 15.03.2005, p. 471-481.

Research output: Contribution to journalArticle

Le Targat, R. ; Zondy, J. J. ; Lemonde, P. / 75%-Efficiency blue generation from an intracavity PPKTP frequency doubler. In: Optics Communications. 2005 ; Vol. 247, No. 4-6. pp. 471-481.
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