It has been known for many years that a nonlinear phase shift can be imparted on the fundamental in non-phasematched second-harmonic generation via down-conversion of the second-harmonic.1 Since two second-order processes occur in succession, this effect is known as cascading. It has recently been shown theoretically that such cascaded phase shifts could prove useful for low power all-optical switching in waveguides at watt power levels, providing that phase shifts of ir or more can be obtained.2 This would allow a totally new approach to obtaining the nonlinear phase shifts needed for all-optical switching. The first measurements of cascaded phase shifts in KTP quasi-phasematched channel waveguides near 855 nm were published recently,3 and results have now been obtained in the important 1.5 pm communications window. The phase shifts obtained are large (>ir) and thus potentially useful in photonic switching applications.

© 1994 Optical Society of America

PDF Article
More Like This
All-optical switching in KTP with second order nonlinearities

M. Sheik-Bahae, Z. Wang, D. J. Hagan, G. Stegeman, E. W. Van Stryland, and G. Assanto
CTuC6 Conference on Lasers and Electro-Optics (CLEO) 1994

Squeezing by nonlinear phase shifts from a cascaded second-order nonlinearity

Ruo-Ding Li and Prem Kumar
QWC2 International Quantum Electronics Conference (IQEC) 1994

Electro-optically Tunable Nonlinear Phase Shift due to Cascaded Second-Order Optical Process in Bulk KTP Crystal

Susheel Kumar Beda, Ruma Debnath, Digvijay Singh Hada, and Ardhendu Saha
Th3A.36 International Conference on Fibre Optics and Photonics (Photonics) 2016


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription