A compact, low-loss, simply prepared all-fiber phase modulator based on the plasmonic absorption of gold nanoparticles decorated on the surface of non-adiabatic microfiber was demonstrated By applying 808 nm pump laser of different powers to the phase modulator, the effective refractive index changes resulting in phase shift of the interference spectrum at 1550 nm. The proposed device can also be utilized as an all-optical switch with the rising and falling edge time of 4.69 ms, 1.99 ms, respectively Furthermore, a tunable wavelength erbium-doped fiber laser was designed by inserting the proposed AuNPs-based phase modulator as a wavelength-tunable filter into a ring cavity. The output center wavelength of the laser was tuned from 1560.23 nm to 1559.29 nm. The proposed AuNPs-based phase modulator has advantages of compact size, low-loss, and simple preparation, which make it can be anticipated to have great potential in the application of all-optical systems.

基于装饰在非绝热微纤维表面上的金纳米粒子的等离子体吸收，一种紧凑、低损耗、简单制备的全光纤相位调制器被证明通过将不同功率的 808 nm 泵浦激光应用于相位调制器，有效折射折射率变化导致干涉光谱在 1550 nm 处发生相移。所提出的器件也可以用作上升沿和下降沿时间分别为 4.69 ms 和 1.99 ms 的全光开关 此外，通过插入所提出的基于 AuNPs 的相位调制器，设计了波长可调的掺铒光纤激光器将波长可调滤波器插入环形腔。激光器的输出中心波长从 1560.23 nm 调谐到 1559.29 nm。所提出的基于 AuNPs 的相位调制器具有体积小、损耗低、