Sanchez-Gonzalez Arturo, Perez-Herrera Rosa Ana, Roldan-Varona Pablo, Duran-Escudero Miguel, Rodriguez-Cobo Luis, Lopez-Higuera Jose Miguel, Lopez-Amo Manuel
Department of Electrical, Electronic and Communication Engineering, Public University of Navarra, 31006 Pamplona, Spain.
Institute of Smart Cities (ISC), Public University of Navarra, 31006 Pamplona, Spain.
Sensors (Basel). 2022 Sep 13;22(18):6888. doi: 10.3390/s22186888.
This work presents a dual-wavelength C-band erbium-doped fiber laser assisted by an artificial backscatter reflector. This fiber-based reflector, inscribed by femtosecond laser direct writing, was fabricated into a single mode fiber with a length of 32 mm. The dual-wavelength laser obtained, centered at 1527.7 nm and 1530.81 nm, showed an optical signal-to-noise ratio over 46 dB when pumped at 150 mW. Another feature of this laser was that the power difference between the two channels was just 0.02 dB, regardless of the pump power, resulting in a dual emission laser with high equalization. On the other hand, an output power level and a central wavelength instability as low as 0.3 dB and 0.01 nm were measured, in this order for both channels. Moreover, the threshold pump power was 40 mW. Finally, the performance of this dual-wavelength fiber laser enhanced with a random reflector for sensing applications was studied, achieving the simultaneous measurement of strain and temperature with sensitivities around 1 pm/με and 9.29 pm/°C, respectively.
这项工作展示了一种由人工背向散射反射器辅助的双波长C波段掺铒光纤激光器。这种基于光纤的反射器通过飞秒激光直接写入刻写而成，被制作成一根长度为32毫米的单模光纤。所获得的双波长激光器，中心波长分别为1527.7纳米和1530.81纳米，在150毫瓦的泵浦功率下，光信噪比超过46分贝。该激光器的另一个特点是，无论泵浦功率如何，两个通道之间的功率差仅为0.02分贝，从而产生了具有高均衡性的双发射激光器。另一方面，两个通道的输出功率水平和中心波长不稳定性分别低至0.3分贝和0.01纳米。此外，阈值泵浦功率为40毫瓦。最后，研究了这种用于传感应用的带有随机反射器的双波长光纤激光器的性能，实现了应变和温度的同时测量，灵敏度分别约为1皮米/微应变和9.29皮米/摄氏度。
