Abstract
AbstractIt is well known that a thin focusing lens, placed at the waist of a Gaussian beam with spot size wo, produces a new beam with a smaller waist spot size, given approximately by w'o ⋍ wof/zR, located approximately at the lens focus (where zR is the beam Rayleigh range and f is the lens focal length). We show that the worst situation, corresponding to the maximum waist spot size, occurs when the lens is placed such that the waist of the original beam is at the lens focus. For this case, the focused beam has its new waist at the other lens focus and its spot size is exactly equal to wof/zR. To optimize (minimize) the focused beam waist spot size the lens should be placed as far away as possible from the original beam waist.
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.
