We present a gas jet array for use in high-order harmonic generation experiments. Precise control of the pressure in each individual gas jet has allowed a thorough investigation into mechanisms contributing to the selective enhancement observed in the harmonic spectra produced by dual-gas, multi-jet arrays. Our results reveal that in our case, the dominant enhancement mechanism is the result of a compression of the harmonic-producing gas jet due to the presence of other gas jets in the array. The individual control of the gas jets in the array also provides a promising method for enhancing the harmonic yield by precise tailoring of the length and pressure gradient of the interaction region.
© 2013 Optical Society of America
Original Manuscript: May 29, 2013
Revised Manuscript: September 12, 2013
Manuscript Accepted: September 15, 2013
Published: October 14, 2013
M. G. Pullen, N. S. Gaffney, C. R. Hall, J. A. Davis, A. Dubrouil, H. V. Le, R. Buividas, D. Day, H. M. Quiney, and L. V. Dao, "High-order harmonic generation from a dual-gas, multi-jet array with individual gas jet control," Opt. Lett. 38, 4204-4207 (2013)