Attwood, D. T., authorLiu, Y., authorBartels, R. A., authorKapteyn, H. C., authorMurnane, M. M., authorChristov, I. P., authorBackus, S., authorGagnon, E., authorPaul, A., authorLibertun, A. R., authorZhang, X., authorOptical Society of America, publisher2007-01-032007-01-032004Zhang, X., et al., Highly Coherent Light at 13 nm Generated by Use of Quasi-Phase-Matched High-Harmonic Generation, Optics Letters 29, no. 12 (June 15, 2004): 1357-1359.http://hdl.handle.net/10217/68041Young's double pinhole experiment, we demonstrate that quasi-phase-matched high-harmonic generation produces beams with very high spatial coherence at wavelengths around 13 nm. To our knowledge these are the highest spatial coherence values ever measured at such short wavelengths from any source without spatial filtering. This results in a practical, small-scale, coherent, extreme-ultraviolet source that is useful for applications in metrology, imaging, and microscopy.born digitalarticleseng©2004 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