Abstract
Spontaneous degenerate four wave mixing (FWM) is investigated in large mode area hybrid photonic crystal fibers, in which photonic bandgap guidance and index guidance is combined. Calculations show the parametric gain is maximum on the edge of a photonic bandgap, for a large range of pump wavelengths. The FWM products are observed on the edges of a transmission band experimentally, in good agreement with the numerical results. Thereby the bandedges can be used to control the spectral positions of FWM products through a proper fiber design. The parametric gain control combined with a large mode area fiber design potentially allows for power scaling of light at wavelengths not easily accessible with e.g. rare earth ions.
Highlights
Rare earth ions are widely used as gain material in active fibers for lasers or amplifiers
The zero GVD wavelength (ZDW) of this fiber is positioned at 1253.5 nm and four wave mixing (FWM) is expected to occur for pump wavelengths in the vicinity of the ZDW
The dispersion profile can be controlled in a large mode area (LMA) hybrid photonic crystal fiber (PCF) by adjustment of the transmission bands
Summary
Rare earth ions are widely used as gain material in active fibers for lasers or amplifiers. One approach is to utilize the nonlinear response of silica, to convert light from wavelengths obtained with rare earth doped gain media For this purpose Raman scattering has been extensively investigated, the generated light is restricted by the Raman response of silica, and the process may not be suited for all applications. The high-index inclusions give rise to large values of normal and anomalous GVD near the edges of a transmission band, enabling control of the ZDW position and the GVD profile. This control can be utilized in the FWM process to determine the spectral position of the FWM products. Thereby it is possible to extend the wavelength coverage of high power fiber sources of high beam quality to wavelengths which may not be accessible by rare earth ions
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
