Reflective liquid crystal  polarization volume grating with high diffraction efficiency and large diffraction angle for optical communication wavelength band

Yujiro Yanai; Kazuya Hisanaga; Yukito Saitoh; Michio Nagai; Yoji Ito

doi:10.1117/12.3002142

8 March 2024 Reflective liquid crystal polarization volume grating with high diffraction efficiency and large diffraction angle for optical communication wavelength band

Yujiro Yanai, Kazuya Hisanaga, Yukito Saitoh, Michio Nagai, Yoji Ito

Author Affiliations +

Proceedings Volume 12882, Optical Components and Materials XXI; 128820A (2024) https://doi.org/10.1117/12.3002142
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We have developed a reflective polarization volume grating using liquid crystal applicable to the wavelength band of optical communication. This diffraction element has the features of realizing both high diffraction angle and high diffraction efficiency which could not be achieved with conventional elements. In order to apply these features to the optical communication wavelength bands, we achieved the alignment of liquid crystal with the required film thickness (7 μm), and, we confirmed high diffraction efficiency (95%) with large diffraction angle (1800 lines/mm) at the optical communication wavelength (1550 nm). In addition, we also confirmed that the high efficiency is maintained approximately 100 nm wavelength band width. We believe that this liquid crystal polarization volume grating can contribute to increasing the transmission speed with low error due to mixed wavelengths in the high wavelength resolution transmission.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yujiro Yanai, Kazuya Hisanaga, Yukito Saitoh, Michio Nagai, and Yoji Ito "Reflective liquid crystal polarization volume grating with high diffraction efficiency and large diffraction angle for optical communication wavelength band", Proc. SPIE 12882, Optical Components and Materials XXI, 128820A (8 March 2024); https://doi.org/10.1117/12.3002142

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