Julian P Noad

Title: Innovations of Julian P. Noad

Introduction

Julian P. Noad is a notable inventor based in Carp, California. He has made significant contributions to the field of photoconductors and laser technology. With a total of 3 patents, his work has advanced the understanding and application of optoelectronic devices.

Latest Patents

One of his latest patents is for a "Depleted Channel Photoconductor." This invention describes photoconductors with channels that lie in the surface depleted region of a GaAs structure. These devices have nanoampere bias current and exhibit photoconductive gain. In contrast to other photoconductors, their low-frequency responsivity is comparable to that in the GHz region, alleviating problems of equalization necessary in receiver applications. Additionally, these devices exhibit over 60 dB isolation as optoelectronic switches. Another significant patent is for "Channelled Substrate Double Heterostructure Lasers." This invention involves fabricating a III-V compound, such as GaAs, with a layered structure. A first layer is grown on a planar substrate by a vapor deposition process adapted to produce differential growth, while a subsequent layer is grown by a deposition process that restores planarity. This method produces a uniformly thick combination layer with a non-planar junction between its composite layers. Particularly in the fabrication of channelled substrate double heterostructure lasers, a channelled blocking layer is grown by organo-metallic pyrolysis (OMP), and a subsequent confining layer is grown using liquid phase epitaxy (LPE). The OMP process produces a channel with flanking shoulder portions that permit LPE growth of a very thin confining layer immediately above the shoulder portions, thereby improving the linearity of the device.

Career Highlights

Throughout his career, Julian has worked with several prominent companies, including Northern Telecom Limited and Canadian Patents & Development Ltd. His experience in these organizations has contributed to his expertise in the field of optoelectronics.

Collaborations

Julian has collaborated with notable individuals such as Anthony J. Springthorpe and Christopher M. Look. These collaborations have further enriched his work and innovations in the field.

Conclusion

Julian P. Noad's contributions to the fields of photoconductors and laser technology demonstrate his innovative spirit and dedication to advancing