Dispersion-tailoring of a NALM-based all-PM Er-doped femtosecond fiber laser

Management of the intra-cavity net dispersion can be used as an optimization method of pulse energy and duration during the design phase of a sub-picosecond laser source. The dispersive regime is one of the key-factors affecting such aspects of laser operation as a pulse formation mechanism, a pulse shape, and a pulse train stability [1] , [2] . Another critical element in the construction of a femtosecond laser is the proper choice of a saturable absorber. The usage of a nonlinear amplifying loop mirror (NALM) equipped with a non-reciprocal phase shifter (NRPS) allows modeling of saturable absorber transmission characteristics in a broad range of the parameter space [3] . The integration of the two components described above allows for the development of a platform capable of a continuous and flexible change of the operating conditions of an ultrafast laser system.