Abstract

In this work, we present a femtosecond fiber chirped pulse amplification (FCPA) system with a temperature-tuned chirped fiber Bragg grating (CFBG) stretcher for uncompensated higher-order spectral phase reduction. An improvement in pulse compression through the optimization of temperature distribution along a CFBG stretcher is predicted numerically and verified experimentally by using a CFBG stretcher with four independent thermoelectric cooler (TEC) elements.

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