High-power, continuous-wave, second-harmonic generation at 532 nm in periodically poled KTiOPO4
2008 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 33, no 24, 2955-2957 p.Article in journal (Refereed) Published
We report efficient generation of high-power, cw, single-frequency radiation in the green in a simple, compact configuration based on single-pass, second-harmonic generation of a cw ytterbium fiber laser at 1064 nm in periodically poled KTiOPO4. Using a crystal containing a 17 mm single grating with period of 9.01 mu m, we generate 6.2 W of cw radiation at 532 nm for a fundamental power of 29.75 W at a single-pass conversion efficiency of 20.8%. Over the. entire range of pump powers, the generated green output is single frequency with a linewidth of 8.5 MHz and has a TEM00 spatial profile with M-2 < 1.34. The demonstrated green power can be further improved by proper thermal management of crystal heating effects at higher pump powers and also by optimized design of the grating period to include thermal issues.
Place, publisher, year, edition, pages
2008. Vol. 33, no 24, 2955-2957 p.
IdentifiersURN: urn:nbn:se:kth:diva-18116DOI: 10.1364/OL.33.002955ISI: 000262609000025ScopusID: 2-s2.0-58149139375OAI: oai:DiVA.org:kth-18116DiVA: diva2:336162
QC 20100525 QC 201201302010-08-052010-08-052015-03-30Bibliographically approved