Benedicto David, Martín Juan C, Dias-Ponte Antonio, Solis Javier, Vallés Juan A
Departamento de Física Aplicada, Instituto de Investigación en Ingeniería de Aragón (I3A), Facultad de Ciencias, Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
Laser Processing Group, Institute of Optics (IO-CSIC), Serrano 121, 28006 Madrid, Spain.
Micromachines (Basel). 2023 Jul 4;14(7):1370. doi: 10.3390/mi14071370.
The design and fabrication of a integrated symmetric directional coupler dependent o the pumping power and operating at a 1534 nm wavelength is reported. The twin-core waveguide was inscribed into Er/Yb co-doped phosphate glass by a femtosecond laser direct writing technique. By optical pumping, the coupling ratio can be modulated due to the changes induced in the refractive index of the material. The experimental results demonstrated that the coupling ratio can be tuned continuously from 100/0 to 50/50 by increasing the pump's power from 0 to 350 mW. The developed twin-core coupler has promising applications for on-chip all-optical signal processing and communication systems.
报道了一种基于泵浦功率、工作波长为1534nm的集成对称定向耦合器的设计与制造。通过飞秒激光直写技术在铒/镱共掺杂磷酸盐玻璃中写入双芯波导。通过光泵浦，由于材料折射率的变化，耦合比可以被调制。实验结果表明，通过将泵浦功率从0增加到350mW，耦合比可以从100/0连续调谐到50/50。所开发的双芯耦合器在片上全光信号处理和通信系统中具有广阔的应用前景。
