Presentation Information
[C-3_C-4-38]Investigation of High-Power Operation and Improved Power Conversion Efficiency of Dual-Port Raman Pumps
〇Junji Yoshida1, Yasuto Tatamida1, Shun Kamada1, Tatsuya Muro1, Masayoshi Seki2, Naoya Hojo2, Yusuke Isozaki2 (1. FURUKAWA ELECTRIC, 2. FFOD)
Keywords:
Raman Pump,High Power,Power Conversion Efficiency,Low Power Consumption,Raman Amplifiers
With increasing transmission speed in optical communication systems, degradation of the optical signal-to-noise ratio (OSNR) has become a key issue, limiting transmission distance. Therefore, optical amplification technologies that maintain signal quality are essential. Raman amplifiers are suitable for wideband transmission because they enable flexible amplification over signal bands by selecting pump wavelengths. To support spectral broadening with high-speed modulation, expansion from the S- to U-band is required, increasing the number of pumps and posing challenges in achieving high output power, low power consumption, and compact implementation.In this study, we investigate a dual-port Raman pump developed for high output power, low power consumption, and compact design. By employing a 5-mm-long asymmetric waveguide laser with an electric-field-control layer, an output power exceeding 1.6 W was achieved at 35 °C. Compared with a conventional 3-mm device, improved power conversion efficiency was confirmed when the combined fiber output exceeded 0.26 W, indicating reduced reactive power. These results confirm the effectiveness of the proposed configuration for high-efficiency Raman amplification.