Abstract
It is suggested that a phase-contrast interferometer can be used in combination with a thin layer of a transparent nonlinear medium to narrow the angular distribution of a coherent laser beam. An experimental demonstration is reported of a fourfold increase in the axial brightness of a diverging He–Ne laser beam. A cell containing a liquid crystal and an additional layer, which absorbed partly the laser radiation and heated the liquid crystal, was used as the nonlinear medium. The experiments confirmed enhancement of the brightness of the phase image in the proposed system.
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.
