Optics Express
A scientific journal of OPTICA (formerly OSA - Optical Society of America) where the read-only access is free of charge.
Optics and Photonics News
The house journal of OPTICA (formerly OSA) contains interesting scientific articles.
Physics - the free online magazine of the American Physical Society (APS)
Physics primarily reports on papers from the Physical Review journals, focusing on results that will change the course of research, inspire a new way of thinking, or spark curiosity. The stories behind these findings are written by experts, journalists, and staff writers.
Laser Focus World
A free magazine (also available as print version) with a lot of product news.
Photonics Spectra
A free magazine (also available as print version) with a lot of product news.