Adaptive Nonlinear Phase Compensation in a Femtosecond Hybrid Laser with Varying Pulse Repetition Rate

Adaptive Nonlinear Phase Compensation in a Femtosecond Hybrid Laser with Varying Pulse Repetition Rate

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In this manuscript, an implementation of I.V. Therapy Accessories a tunable nonlinear phase compensation method is demonstrated on a typical femtosecond hybrid laser consisting of a fiber pre-amplifier and an additional solid-state amplifier.This enables one to achieve constant laser pulse parameters over a wide range of pulse repetition rates in such a laser.As the gain in the solid-state amplifier is inversely proportional to the input power, the shortfall in the solid-state gain at higher repetition rates must be compensated for with fiber pre-amplifier to ensure constant pulse energy.This increases the accumulated nonlinear phase and consequently alters the laser pulse parameters such as pulse Napkin Holders/Dispensers duration and Strehl ratio.

To overcome this issue, the nonlinear phase must be compensated for, and what is more it should be compensated for to a different extent at different pulse repetition rates.This is achieved with a tunable CFBG, used also as a pulse stretcher.Using this concept, we demonstrate that constant laser pulse parameters such as pulse energy, pulse duration and Strehl ratio can be achieved in a hybrid laser regardless of the pulse repetition rate.