Lightguiding in ion-exchanged photochromic glass layers is reported. The guides were formed by ion exchange of Ag(+) for Na(+) or by outdiffusion of F. Guide attenuation was less than 0.2 dB/cm in many cases. The attenuation in the guide was varied over a range of Deltaalpha = 30 dB/cm by illuminating the guide with (1) uv radiation to darken the guide or order of seconds. (2) visible radiation to bleach the guide. Switching times were in the order of seconds.
No takes yet. Share an insight, caveat, or question.
Crow et al. (1975) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: