Abstract
Two twin AgGaSe 2 crystals ( l c=20 mm) cut for the second-harmonic generation (SHG) of 10.2 μm radiation have been submitted to up to 1.3 W single-mode continuous-wave (CW) output of a CO 2 laser focused to a decreasing beam radius w 0. For a power density exceeding 1.6 kW/cm 2, corresponding to a focusing parameter l= l c z R far under the theoretical optimum one, the second-harmonic (SH) generated power starts to saturate due to thermal effects. The study of the conversion efficiency versus the focusing parameter for the walkoff-compensated twin device reveals that this two-crystal device is more efficient than would be a single crystal of length 2 l c, despite the small walkoff angle in this material.
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.
