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arXiv · 1609.09239

Compact transient-grating self-referenced spectral interferometry for sub-nanojoule femtosecond pulses characterization

Xiong Shen·Peng Wang·Jun Liu·Ruxin Li
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Abstract

The self-referenced spectral interferometry (SRSI) technique, which is usually used for microjoule-level femtosecond pulses characterization, is improved to characterize weak femtosecond pulses with nanojoule based on the transient-grating effect. Both femtosecond pulses from an amplifier with 3 nJ per pulse at 1 kHz repetition rates and femtosecond pulses from an oscillator with less than 0.5 nJ per pulse at 84 MHz repetition rates are successfully characterized. Furthermore, through a special design, the optical setup of the device is even smaller than a palm which will makes it simple and convenient during the application. These improvements extend the application of SRSI technique to the characterization of femtosecond pulses in a broad range. Not only pulses from an amplifier but also pulses from an oscillator or weak pulses used in ultrafast spectroscopy can be monitored with this SRSI method right now.

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Xiong Shen, Peng Wang, Jun Liu, Ruxin Li. 2016-09-29. Compact transient-grating self-referenced spectral interferometry for sub-nanojoule femtosecond pulses characterization. https://doi.org/10.1364/ao.56.000582

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