Abstract

It has long been recognized that an optical fiber is not a useful pulse stretcher for sub-picosecond CPA systems because of the cubic-phase mismatch between the fiber and grating-pair compressor.1 The use of a grating stretcher (which more closely matches a compressor) made possible the amplification and compression of 100-fs pulses. The grating stretcher has been refined to support shorter pulses,2 but these improvements in performance have come at the expense of simplicity. Compared to grating stretchers, the optical fiber stretcher is extremely compact and easy to align. In addition, a fiber produces a perfect spatial-chirp-free beam (which is difficult to obtain with grating stretchers). ACPA system capable of employing a fiber stretcher would greatly simplify the challenge of producing a clean stretched pulse. In this paper we propose a fiber stretcher and grating-prism compressor that is fully cubic-phase compensated and can be used with millijoule-energy, sub-100-fs pulses.

© 1995 Optical Society of America

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