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Broadband sum frequency generation via chirped quasi-phase-matching | | A. A. Rangelov
; N. V. Vitanov
; | | Date: |
5 Nov 2011 | | Abstract: | An efficient broadband sum frequency generation (SFG) technique using the two
collinear optical parametric processes omega 3=omega 1+omega 2 and omega
4=omega 1+omega 3 is proposed. The technique uses chirped quasi-phase-matched
gratings, which, in the undepleted pump approximation, make SFG analogous to
adiabatic population transfer in three-state systems with crossing energies in
quantum physics. If the local modulation period %for aperiodically poled
quasi-phase-matching first makes the phase match occur for omega 3 and then
for omega 4 SFG processes then the energy is converted adiabatically to the
omega 4 field. Efficient SFG of the omega 4 field is also possible by the
opposite direction of the local modulation sweep; then transient SFG of the
omega 3 field is strongly reduced. Most of these features remain valid in the
nonlinear regime of depleted pump. | | Source: | arXiv, 1111.1333 | | Services: | Forum | Review | PDF | Favorites | |
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