October 2017 Issue
Feature Articles
High-Average-Power Ultrafast Lasers
Recent advances in the average-power capabilities of lasers with petawatt peak powers are enabling new science and applications in industry, biomedicine and security.
by Thomas M. Spinka and Constantin HaefnerEmerging Connections: Classical and Quantum Optics
The blurring of the classical-quantum boundary points to new directions in optics.
by Xiao-Feng Qian, A. Nick Vamivakas and Joseph H. EberlyDepartments and Columns
Challenging a Culture of Inequality
Progressive initiatives at a new Japanese academic institution tackle some deep-rooted gender inequities.
Explaining the Laser Market’s Long-Term Growth
Though the dependence on capital spending creates a cyclical business, a continual stream of new applications helps to keep laser sales growing.
“Thoughtographs” and Stanhope Lenses
A 1960s personality wowed audiences with his supposedly paranormal images—but magicians detected optical illusions, not sorcery.
Also in this Issue
OSA chases the “Great American Eclipse”; entrepreneruship workshop in Tanzania; CLEO-Pacific Rim; thanks, meeting volunteers and editors.

![Manual probe system with needles for test of semiconductor on silicon wafer. [A. Morozov / Getty]](https://opnmedia.blob.core.windows.net/$web/opn/media/images/articles/2025/1125/departments/202511-cover-web.jpg?ext=.jpg)
![Researcher Clara Saraceno in the lab. [Image by Carsten Behler Photography]](https://opnmedia.blob.core.windows.net/$web/opn/media/images/articles/2025/1025/departments/202510-cover-web.jpg?ext=.jpg)