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Article Abstract
A compact and alignment-free device based on transient grating self-referenced spectral interferometry is proposed to realize the temporal profile measurement of femtosecond laser pulses. The entire optical setup is composed of two lenses and two glass plates on a straight line with tubes, thereby avoiding complicated optical alignment and improving the stability and practicality of the device. Two 51.0 fs and 16.9 fs laser pulses at 800 nm and a 60.6 fs pulse at 1800 nm are all successfully measured by this device, which verifies the reliability of the device.
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