Degenerate Four Wave Mixing from a Waveguide with Guided Wave Pump Beams
Abstract
We have analyzed the problem of degenerate four wave mixing in which a probe beam is incident from above onto a thin film waveguide pumped by two oppositely propagating guided waves. Four wave mixing signals are obtained both on reflection from the film surface, and on transmission into the substrate supporting the film. Analytical formulae are evaluated for a number of different cases which compare nonlinearities in the film versus the substrate. Degenerate four-wave mixing has a number of potential applications for retro-reflectors, correction of phase aberrations, laser resonators, signal processing etc. Guided wave geometries offer some potentially useful approaches to DFWM. The strong beam confinement results in high power densities. The four-wave mixing of an incident plane wave occurs effectively over an interaction distance of a micron, decreasing the effects of distortion etc. Despite the short interaction distance, the efficiencies can still be high due to the high power densities available with guided waves, i.e. very high pump beam powers are not necessary. A DFWM signal is obtained on transmission and is separated in angle from the incident probe beam. This means that the DFWM signal can be accessed without using a beamsplitter to separate the probe and conjugate signals. Keywords: Nonlinear optics, Solitons, Soliton transfer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1989
- Accession Number
- ADA216454
Entities
People
- C. T. Seaton
- E. M. Wright
- G. I. Stegeman
Organizations
- University of Arizona