Kapteyn, H. C., authorMurnane, M. M., authorWyss, J., authorBaertschy, M. D., authorWagner, N. L., authorBartels, R. A., authorOptical Society of America, publisher2007-01-032007-01-032003Bartels, R. A., Phase-Matching Conditions for Nonlinear Frequency Conversion by Use of Aligned Molecular Gases, Optics Letters 28, no. 5 (March 1, 2003): 346-348.http://hdl.handle.net/10217/67984Transient birefringence can be induced in a gas of anisotropic molecules by an intense polarized laser pulse. We propose to use this birefringence to phase match nonlinear optical frequency-conversion processes. The conditions for anisotropic phase matching are derived, and experimental conditions required for phase-matched third-harmonic generation in a gas-filled hollow-core fiber are presented. We show that these conditions are experimentally feasible over a significant parameter range, making possible a new type of nonlinear optics.born digitalarticleseng©2003 Optical Society of America.Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text