关键词: S波段, 铥镱共掺纳米晶, 聚合物, 光波导放大器

Abstract: S-Band Polymer Waveguide Amplifier Based on Thulium Ytterbium Co-Doped Nanocrystals LIU Tingting, WANG Jiahe, ZHAO Dan, WANG Fei (College of Electronic Science and Engineering, Jilin University, Changchun 130012, China) Abstract: In order to solve the problem of insufficient communication bandwidth caused by the constantly growing network capacity, expanding the optical communication band from the main C-band (1 530 ~1 565 nm) to the S-band (1 460 ~1 530 nm) and L-band (1 565 ~1 630 nm) has become an effective way to address this issue. Tm3+can emit light at a wavelength of ~1 490 nm under pump excitation, and doping it into a waveguide can achieve S-band optical amplifier. The NaYF4 : Tm3+, Yb3+nanocrystals are introduced into polymer materials as amplifier gain media, a planar waveguide amplifier structure is designed, and the gain performance of the device is simulated in the S-band. Four waveguide amplifier samples with different Yb3+doping concentrations (x=5,10,15,20) are prepared using NaYF4 :1% Tm3+ and x% Yb3+ nanocrystals, and the device gain performance is tested. The experimental results show that when the Yb3+doping concentration is 10%, the gain of the waveguide amplifier is maximum, and the 1 cm long device achieves a relative gain of 8.2 dB at a pump power of 400 mW. The modeling and simulation of the Tm3+and Yb3+co doped system proposed in this paper provide theoretical guidance for the development of high-performance S-band waveguide amplifiers. Using NaYF4 , the polymer optical waveguide amplifier prepared by Tm3+ and Yb3+ nanocrystals has achieved S-band optical amplification and is expected to be widely used in optical communication.

Key words: S-band, thulium ytterbium co-doped nanocrystals, polymer, optical waveguide amplifier