US Patent Application 18024559. LONG PERIOD FIBER GRATING AND OPTICAL TRANSMISSION SYSTEM simplified abstract
Contents
LONG PERIOD FIBER GRATING AND OPTICAL TRANSMISSION SYSTEM
Organization Name
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor(s)
Ryota Imada of Musashino-shi, Tokyo (JP)
Yoko Yamashita of Musashino-shi, Tokyo (JP)
Takashi Matsui of Musashino-shi, Tokyo (JP)
Taiji Sakamoto of Musashino-shi, Tokyo (JP)
Nobutomo Hanzawa of Musashino-shi, Tokyo (JP)
Noriyuki Araki of Musashino-shi, Tokyo (JP)
Shinichi Aozasa of Musashino-shi, Tokyo (JP)
Yuto Sagae of Musashino-shi, Tokyo (JP)
Kazuhide Nakajima of Musashino-shi, Tokyo (JP)
LONG PERIOD FIBER GRATING AND OPTICAL TRANSMISSION SYSTEM - A simplified explanation of the abstract
- This abstract for appeared for US patent application number 18024559 Titled 'LONG PERIOD FIBER GRATING AND OPTICAL TRANSMISSION SYSTEM'
Simplified Explanation
The abstract describes a Long-Period Fiber Grating (LPFG) and an optical transmission system. The LPFG is designed to have a mode conversion amount that is independent of the polarization state and electric field distribution. The LPFG consists of two rows of cavities arranged periodically in the core region of a few-mode fiber. These cavity rows are positioned away from the central axis of the core region and parallel to it. Each cavity row is located at a different position along the length of the few-mode fiber, and the two rows are shifted by 90 degrees on a cross-section of the core region. The center of the cross-section serves as the origin.
Original Abstract Submitted
Provided are an LPFG and an optical transmission system in which a mode conversion amount does not depend on a polarization state and an electric field distribution. The LPFG according to the present invention includes cavity rows (- and -) of cavities periodically arranged in a core region of the few-mode fiber at a position away from a central axis z of the core region in parallel with the central axis z. Each of the cavity rows (- and -) is located at a different position in a longitudinal direction of the few-mode fiber (where the position in a z direction is different), and the cavity rows (- and -) are located at positions shifted by 90° on a cross section of the core region with the center of the cross section of the core region (the intersection of an x-axis and a y-axis) as an origin.
