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Femtosecond phase stabilizer
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The phase stabilization device can control the phase relationship of the ultrashort pulse and its carrier envelope. The pulse of a femtosecond laser is broadened in a nonlinear photonic crystal fiber to obtain an octave spectrum. The nonlinear interferometer then generates a beat frequency between the dual-frequency infrared part and the green part of the spectrum. This beat signal is sent to the electronic lock. This stable electron is designed for frequency repetition ¼ beat in an oscillator with phase locking. This allows every four pulses to have the same phase in the strict sense. Subsequent amplification systems can output these pulses without phase cost.

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