Type-I frequency-doubling characteristics of high power, ultrafast fiber laser in thick BIBO crystal

Show simple item record

dc.contributor.author Apurv Chaitanya, N.
dc.contributor.author Aadhi, A.
dc.contributor.author Singh, Ravindra P.
dc.contributor.author Samanta, Goutam Kumar
dc.date.accessioned 2014-08-22T17:02:19Z
dc.date.available 2014-08-22T17:02:19Z
dc.date.issued 2014-08
dc.identifier.citation Chaitanya, N. Apurv; Aadhi, A; Singh, Ravindra P. and Samanta, Goutam K., “Type-I frequency-doubling characteristics of high power, ultrafast fiber laser in thick BIBO crystal”, Optics Letters, Aug. 2014. en_US
dc.identifier.issn 0146-9592
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1375
dc.identifier.uri https://doi.org/10.1364/OL.39.005419
dc.description.abstract We report on experimental realization of optimum focusing condition for type-I second-harmonic generation (SHG) of high-power, ultrafast laser in “thick” nonlinear crystal. Using single-pass, frequency doubling of a 5 W Yb-fiber laser of pulse width ∼260  fs at repetition rate of 78 MHz in a 5-mm-long bismuth triborate (BIBO) crystal we observed that the optimum focusing condition is more dependent on the birefringence of the crystal than its group-velocity mismatch (GVM). A theoretical fit to our experimental results reveals that even in the presence of GVM, the optimum focusing condition matches the theoretical model of Boyd and Kleinman, predicted for continuous-wave and long-pulse SHG. Using a focusing factor of 𝜉=1.16 close to the estimated optimum value of 𝜉=1.72 for our experimental conditions, we generated 2.25 W of green radiation of pulse width 176 fs with single-pass conversion efficiency as high as 46.5%. Our study also verifies the effect of pulse narrowing and broadening of angular phase-matching bandwidth of SHG at tighter focusing. This study signifies the advantage of SHG in “thick” crystal in controlling SH-pulse width by changing the focusing lens while accessing high conversion efficiency and broad angular phase-matching bandwidth.
dc.description.statementofresponsibility by N. Apurv Chaitanya, A. Aadhi, Ravindra P. Singh, and Goutam Kumar Samanta
dc.format.extent vol. 39, no. 18, pp. 5419-5422
dc.language.iso en en_US
dc.publisher Optical Society of America en_US
dc.subject Frequency-doubling en_US
dc.subject Gaussian beam profile en_US
dc.subject Nonlinear crystals en_US
dc.subject Periodically poled en_US
dc.subject Signal radiation en_US
dc.title Type-I frequency-doubling characteristics of high power, ultrafast fiber laser in thick BIBO crystal en_US
dc.type Article en_US
dc.relation.journal Optics Letters


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Digital Repository


Browse

My Account