[B-10A_B-13] Optical Communication SystemsA (Optical Fibers)/Optical Fiber Technologies

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)Candidate for Academic Incentive AwardCareer Explorer

[B-10A_B-13-12] Investigation of the Tolerance to Manufacturing Errors in LPFG-Type Mode-Dependent Loss Equalization Devices Inscribed by Femtosecond Laser

◎△Takumi Kimura¹, Takanori Sato¹, Masaki Wada², Yoko Yamashita^1,2, Taro Iwaya², Takashi Matsui², Kazuhide Nakajima², Kunimasa Saitoh¹ (1. Hokkaido Univ., 2. NTT Inc.)

Keywords:

Long period fiber grating,Mode-division multiplexing,Few mode fiber,Optical fiber,Femtosecond laser

We investigate the fabrication tolerance of a long-period fiber grating (LPFG)-based mode-dependent loss (MDL) equalizer for 2-LP mode transmission using localized refractive index modulation with a femtosecond laser. We evaluate the impact of errors in the modulation radius and position on device characteristics, and demonstrate that both designs exhibit sufficient fabrication tolerance within the achievable precision of femtosecond laser processing.