Abstract
In this letter, we investigate and compare theoretically the performance of an optimized L-band erbium doped fiber amplifier when an L-band erbium doped fiber (EDF) or an optimized C-band EDF, is used separately as an ASE (amplified spontaneous emission) pump source. We show that the gain per unit length increases with increase in cut-off wavelength independent of the numerical aperture (NA) of the EDF; the pump efficiency peaks in the region of cut-off wavelength between 1075 and 1125 nm, the exact value of which depends upon the level of inversion of the EDF. It is also observed that the pump efficiency as well as the gain per unit length increase with increase in level of inversion for a given cut-off wavelength. The pump efficiency as well as the ASE power per unit length are better for the case when a complete L-band optimized amplifier is used than when an optimized C-band amplifier is used as a pump source to amplify an L-band signal propagating in a cascaded L-band optimized amplifier. Also the gain achieved is much higher if the signal is fed into the entire amplifier with the pump, rather than at an intermediate point.
Sign-in/Register to access full text options 
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.
