Research output: Contribution to journal › Article › peer-review
Second harmonic generation in multimode graded-index fibers : Spatial beam cleaning and multiple harmonic sideband generation. / Ceoldo, D.; Krupa, K.; Tonello, A. et al.
In: Optics Letters, Vol. 42, No. 5, 01.03.2017, p. 971-974.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Second harmonic generation in multimode graded-index fibers
T2 - Spatial beam cleaning and multiple harmonic sideband generation
AU - Ceoldo, D.
AU - Krupa, K.
AU - Tonello, A.
AU - Couderc, V.
AU - Modotto, D.
AU - Minoni, U.
AU - Millot, G.
AU - Wabnitz, S.
N1 - Publisher Copyright: © 2017 Optical Society of America.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - We study experimentally and numerically the spectral and spatial dynamics of second harmonic generation in an all-optically poled multimode graded-index fiber. In contrast with poled single-mode fibers, in a multimode graded-index fiber a pump can generate a series of sharp sidebands around its second harmonic (SH) that originate from the sub-millimetric periodic evolution of the intensity at the fundamental frequency. The mutual interaction between the fundamental and its SH may also strongly affect the spatial distribution of guided light for both colors: when increasing the pump power, both fundamental and SH output beams evolve from disordered multimode speckles into two bell-shaped beams.
AB - We study experimentally and numerically the spectral and spatial dynamics of second harmonic generation in an all-optically poled multimode graded-index fiber. In contrast with poled single-mode fibers, in a multimode graded-index fiber a pump can generate a series of sharp sidebands around its second harmonic (SH) that originate from the sub-millimetric periodic evolution of the intensity at the fundamental frequency. The mutual interaction between the fundamental and its SH may also strongly affect the spatial distribution of guided light for both colors: when increasing the pump power, both fundamental and SH output beams evolve from disordered multimode speckles into two bell-shaped beams.
KW - OPTICAL-FIBERS
KW - INSTABILITY
KW - GLASSES
KW - PULSES
KW - LIGHT
UR - http://www.scopus.com/inward/record.url?scp=85014674753&partnerID=8YFLogxK
U2 - 10.1364/OL.42.000971
DO - 10.1364/OL.42.000971
M3 - Article
C2 - 28248344
AN - SCOPUS:85014674753
VL - 42
SP - 971
EP - 974
JO - Optics Letters
JF - Optics Letters
SN - 0146-9592
IS - 5
ER -
ID: 10064801