Zobrazeno 1 - 10
of 666
pro vyhledávání: '"Wise, F."'
Autor:
Eftekhar, M. A., Wright, L. G., Mills, M. S., Kolesik, M., Correa, R. Amezcua, Wise, F. W., Christodoulides, D. N.
We demonstrate that the pump's spatial input profile can provide additional degrees of freedom in tailoring at will the nonlinear dynamics and the ensuing spectral content of supercontinuum generation in highly multimoded optical fibers. Experiments
Externí odkaz:
http://hdl.handle.net/10150/624041
http://arizona.openrepository.com/arizona/handle/10150/624041
http://arizona.openrepository.com/arizona/handle/10150/624041
Autor:
Sanjabieznaveh, Z., Eftekhar, M. A., Lopez, J. E. Antonio, Aviles, H. Lopez, Kolesik, M., Wise, F. W., Christodoulides, D. N., Correa, R. Amezcua
Blue-enhanced, broadband supercontinuum generation in a 50 um core fluorine-doped graded-index multimode fiber is demonstrated by pumping with a 1064 nm picosecond source. Multi-octave supercontinuum spectrum extending from ~400 nm to 2,400 nm is ach
Externí odkaz:
http://arxiv.org/abs/1810.11559
Publikováno v:
Physical Review Letters 109, 043902 (2012)
Cascaded nonlinearities have attracted much interest, but ultrafast applications have been seriously hampered by the simultaneous requirements of being near phase-matching and having ultrafast femtosecond response times. Here we show that in strongly
Externí odkaz:
http://arxiv.org/abs/1109.4261
Publikováno v:
Opt. Express 19, 22557-22562 (2011)
When ultrafast noncritical cascaded second-harmonic generation of energetic femtosecond pulses occur in a bulk lithium niobate crystal optical Cherenkov waves are formed in the near- to mid-IR. Numerical simulations show that the few-cycle solitons r
Externí odkaz:
http://arxiv.org/abs/1109.0376
A theory of the electronic structure and excitonic absorption spectra of PbS and PbSe nanowires and nanorods in the framework of a four-band effective mass model is presented. Calculations conducted for PbSe show that dielectric contrast dramatically
Externí odkaz:
http://arxiv.org/abs/1010.6047
Publikováno v:
Optics Express, Vol. 16, Issue 5, pp. 3273-3287 (2008), http://www.opticsexpress.org/abstract.cfm?id=154644
We study cascaded quadratic soliton compressors and address the physical mechanisms that limit the compression. A nonlocal model is derived, and the nonlocal response is shown to have an additional oscillatory component in the nonstationary regime wh
Externí odkaz:
http://arxiv.org/abs/0801.0707
Publikováno v:
Opt. Lett. 32, 2490-2492 (2007), http://www.opticsinfobase.org.globalproxy.cvt.dk/abstract.cfm?URI=ol-32-17-2490
We study soliton pulse compression in materials with cascaded quadratic nonlinearities, and show that the group-velocity mismatch creates two different temporally nonlocal regimes. They correspond to what is known as the stationary and nonstationary
Externí odkaz:
http://arxiv.org/abs/0706.1933
Publikováno v:
Journal of the Optical Society of America B 24, 2752-2762 (2007)
We present a detailed study of soliton compression of ultra-short pulses based on phase-mismatched second-harmonic generation (\textit{i.e.}, the cascaded quadratic nonlinearity) in bulk quadratic nonlinear media. The single-cycle propagation equatio
Externí odkaz:
http://arxiv.org/abs/0706.1507
Self-similar propagation of ultrashort, parabolic pulses in a laser resonator is observed theoretically and experimentally. This constitutes a new type of pulse-shaping in modelocked lasers: in contrast to the well-known static (soliton-like) and bre
Externí odkaz:
http://arxiv.org/abs/physics/0402013
Publikováno v:
J. Opt. Soc. Am. B 21, 376 (2004)
We show that useful non-instantaneous nonlinear phase shifts can be obtained from cascaded quadratic processes in the presence of group velocity mismatch. The two-field nature of the process permits responses that can be effectively advanced or retar
Externí odkaz:
http://arxiv.org/abs/physics/0310036