This is the site of John R. Goff, retired physicist, husband and grandfather. This is a site for my “multifaceted” interests, from language, genealogy, the great outdoors, and my scientific publications, to a vintage game we call the “hex game” in the Goff family. I’ll update the site periodically with new posts and updates. Please have a look around, and don’t hesitate to get in touch!

Scientific Publications

Journal Articles

Dubinskii, M., Ferry, M. J., Goff, J. R., Merkle, L. D., & Wood, G. L. (2003). Highly scalable high repetition rate Nd : YAG laser based on coherent beam coupling. Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference, 1–3.

Goff, J. R. (1997). Experimental realization of a multiproduct photorefractive correlation system for temporal signals. Applied Optics, 36(26), 6627–6635.

Goff, J. R., & Luner, P. (1984). Measurement of colloid mobility by laser doppler electrophoresis: the effect of salt concentration on particle mobility. Journal of Colloid And Interface Science, 99(2), 468–483.

Wood, C., Salamo, G. J., Goff, J., Wood, G. L., Anderson, R. J., & Mcgee, D. J. (2002). Fixed three-dimensional holographic images. Applied Optics, 41, 6796–6801.

Goff, J. R. (1995). Polarization properties of transmission and diffraction in BSO—a unified analysis. Journal of the Optical Society of America B, 12(1), 99.

Conference Proceedings

Dubinskii, M., Merkle, L. D., Newburgh, G. A., Goff, J. R., Castillo, V. K., & Quarles, G. J. (2005). Laser Studies of 8% Nd:YAG Ceramic Gain Material. Advanced Solid-State Photonics (TOPS), 47.

Dubinskii, M., Goff, J. R., Merkle, L. D., Castillo, V. K., & Quarles, G. J. (2005). Q-Switched Laser Operation of 8 % Ceramic Nd : YAG. Conference on Lasers and Electro-Optics, 8–10.

Schnürer, M., Bränzel, J., Priebe, G., Andreev, A. A., Toncian, T., Willi, O., & Sandner, W. (1986). Three-Dimensional Photorefractive Signal Processing In Bismuth Silicon Oxide. Proceedings of SPIE, 0698(March 1986).

Goff, J. R. (1991). Use of magneto-optic spatial light modulators and linear detector arrays in inner-product associative memories. Proceedings of SPIE, 1558(November 1991).

Dubinskii, M. Ferry, J. Goff, L. Merkel, G. W. (2003). Modular laser power scaling approach based on coherent beam coupling via stimulated Brillouin scattering. IEEE, 7803.

Dubinskii, M., Ferry, M. J., Goff, J. R., Merkle, L. D., & Wood, G. L. (2006). Highly scalable high repetition rate Nd : YAG laser based on coherent beam coupling, 1–3.

Goff, J. R. (2000). Bragg diffraction of colliding spatial photorefractive solitons in SBN. Proceedings of SPIE, 4110(October 2000).

Goff, J. R., & Brody, P. S. (1988). Modeling Of Self-Pumped Single Barium Titanate Crystal. Proceedings of SPIE, 0874(April 1988).

Dubinskii, M., Merkle, L. D., Goff, J. R., Quarles, G. J., Castillo, V. K., Schepler, K. L., … Lee, S.-H. (2005). Processing technology, laser, optical and thermal properties of ceramic laser gain materials, (June 2005), 1.

Quarles, G. J., Castillo, V. K., Dubinskii, M., Merkle, L. D., Goff, J. R., Wood, G. L., … Lee, S. (2004). Comparison of Laser, Optical and Thermal Properties of Ceramic Laser Gain Materials with Single Crystal Materials. IEEE, 1, 935–936. Retrieved from

Goff, J. R. (1990). Inner-Product Implementations of Optical Associative Memories. International Joint Conference on Neural Networks, (June 1990), 1–7. Retrieved from

Goff, J. R., & Brody, P. S. (1986). Single Crystal Self-Pumped Phase Conjugation in Barium Titanate. Applications of Ferroelectrics. 1986 Sixth IEEE International Symposium on Applications of Ferroelectrics.


A long standing tradition in the Goff family is to find solutions to the “hex game”, a puzzle game made with plastic pieces that my wife Sue and I began playing with friends in the 1970s. The game was marketed as It’s Hexed, and is not to be confused with the board game game Hex invented by John Nash. In the game, the player must fit 12 pieces into a rectangular region with no overlaps or missing space. It turns out there are over 2000 unique ways to do this, and among family and friends we have obtained and cataloged over half of them. Have a try in the web-based version below. Click to drag the shapes, and double click to rotate them: