Lightwave Logic Inc (LWLG)

[Fruno]

Patent allowance - NONLINEAR OPTICAL CHROMOPHORES HAVING A DIAMONDOID GROUP ATTACHED THERETO, METHODS OF PREPARING THE SAME, AND USES THEREOF
Application no. 17/358,960, dated June 25, 2021. Publication no. 2021/0405504.

The letter of allowance was issued on Nov. 1, so the patent should be published soon. The key is that adding the diamondoid groups allows for increased concentration of the chromophore in the polymer solution (increasing r33 - electro-optic activity), easier poling, and better long-term stability by preventing the chromophores from becoming 'un-poled'. It also means the polymer can have a higher glass transition temperature (Tg, the temp at which the solid polymer softens), so it works better under high temperature conditions.

The company put it this way in the application:

Electro-optic activity may be increased in electro-optic polymers by increasing the concentration of nonlinear optical chromophores in a host polymer and by increasing of the electro-optic property of chromophores. However, some techniques for increasing chromophore concentration may decrease temporal stability. Simultaneous solution of these dual issues is regarded as the final impediment in the broad commercialization of EO polymers in numerous devices and systems.

This is the solution.