Narendra K Shankar

Title: Innovations of Narendra K Shankar in Optical Switch Technology

Introduction

Narendra K Shankar is an accomplished inventor based in Ithaca, NY (US). He has made significant contributions to the field of optical switch technology, particularly through his innovative use of cholesteric or chiral nematic liquid crystals. His work has implications for various applications in optical communications and signal processing.

Latest Patents

Shankar holds a patent for "Optical switches using cholesteric or chiral nematic liquid crystals." This patent describes fiber optic switches that utilize layers of cholesteric or chiral nematic liquid crystals (CLCs). The CLC layer functions as both a polarization beamsplitter and a reflector, decomposing incoming unpolarized light into two orthogonal circularly polarized components. In various embodiments, switchable waveplates are employed to control the polarization direction of each component. The components are then reflected back toward the CLC layer, where they are recombined into a transmitted unpolarized beam. The direction of transmission is dependent on the circular sense of the polarized components, which is influenced by the state of the switchable waveplates. Additionally, the CLCs can be actively used by selectively exposing them to electric or magnetic fields or heat, causing a phase change that temporarily neutralizes the circular polarization effect. This allows the CLCs to function as switch elements themselves.

Career Highlights

Throughout his career, Shankar has worked with notable organizations, including the Cornell Research Foundation Inc. and E.I. DuPont de Nemours and Company. His experience in these institutions has contributed to his expertise in optical technologies and innovations.

Collaborations

Shankar has collaborated with esteemed colleagues such as Jeffrey A. Morris and Clifford R. Pollock. These collaborations have further enriched his research and development efforts in the field of optical switches.

Conclusion

Narendra K Shankar's contributions to optical switch technology highlight his innovative spirit and technical expertise. His patent on cholesteric or chiral nematic liquid crystals showcases the potential for advancements in optical communications. His work continues to influence the field and inspire future innovations.