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Geometrical representation of sum frequency generation and adiabatic frequency conversion Haim Suchowski,1,* Dan Oron,1
 

Summary: Geometrical representation of sum frequency generation and adiabatic frequency conversion
Haim Suchowski,1,* Dan Oron,1
Ady Arie,2
and Yaron Silberberg1
1
Department of Physics of Complex System, Weizmann Institute of Science, Rehovot 76100, Israel
2
School of Electrical Engineeing, Faculty of Engineering, Tel Aviv University, Tel Aviv, Israel
Received 1 May 2008; revised manuscript received 22 October 2008; published 15 December 2008
We present a geometrical representation of the process of sum frequency generation in the undepleted pump
approximation, in analogy with the known optical Bloch equations. We use this analogy to propose a technique
for achieving both high efficiency and large bandwidth in sum frequency conversion using the adiabatic
inversion scheme. The process is analogous with rapid adiabatic passage in NMR, and adiabatic constraints are
derived in this context. This adiabatic frequency conversion scheme is realized experimentally using an ape-
riodically poled potassium titanyl phosphate KTP device, where we achieved high efficiency signal-to-idler
conversion over a bandwidth of 140 nm.
DOI: 10.1103/PhysRevA.78.063821 PACS number s : 42.65.Ky, 42.25.Fx, 42.70.Qs
The generation of tunable optical radiation typically relies
on nonlinear frequency conversion in crystals. In this pro-
cess, light of two frequencies is mixed in a nonlinear crystal,

  

Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University

 

Collections: Engineering