Abstract
We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.
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.
