The ways of optimising the spectral linewidth of gain-switched asymmetric waveguide lasers with a large effective spot size for applications in non-linear optics are discussed. Theoretical analysis and comparison of different schemes of spectral narrowing for non-linear applications is presented, and the ways of maximising the performance improvement offered by the large effective spot size are compared. It is shown that, while customised single-frequency lasers are the most efficient in generating the non-linear signal, Fabry-Perot lasers operated in self-seeded gain-switched or external cavity mode locked regime are also capable of combining the advantages of the large effective spot size with a spectral linewidth within the tolerances provided by the spectral acceptance of typical non-linear elements.
|Number of pages||9|
|Early online date||29 Feb 2016|
|Publication status||Published - 1 Apr 2016|