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 language | English |
|---|---|
| Pages (from-to) | 471-481 |
| Number of pages | 11 |
| Journal | Optics Communications |
| Volume | 247 |
| Issue number | 4-6 |
| DOIs | |
| Publication status | Published - Mar 15 2005 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - 75%-Efficiency blue generation from an intracavity PPKTP frequency doubler
AU - Le Targat, R.
AU - Zondy, J. J.
AU - Lemonde, P.
PY - 2005/3/15
Y1 - 2005/3/15
N2 - 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.
AB - 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.
KW - PPKTP
KW - Second harmonic generation
KW - Strontium
KW - Thermal effects
UR - http://www.scopus.com/inward/record.url?scp=14844304703&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=14844304703&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2004.11.081
DO - 10.1016/j.optcom.2004.11.081
M3 - Article
AN - SCOPUS:14844304703
VL - 247
SP - 471
EP - 481
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
IS - 4-6
ER -