Álvarez-Tamayo Ricardo I, Gaspar-Ramírez Omar, Prieto-Cortés Patricia, García-Méndez Manuel, Barcelata-Pinzón Antonio
Postgraduate Programs Department, Universidad Popular Autónoma del Estado de Puebla, Puebla 72410, Mexico.
Faculty of Physics and Mathematics, Universidad Autónoma de Nuevo León, San Nicolás de los Garza 66455, Mexico.
Nanomaterials (Basel). 2020 May 10;10(5):923. doi: 10.3390/nano10050923.
The use of titanium oxynitride (TiON) thin films as a saturable absorber (SA) element for generation of passive Q-switched (PQS) laser pulses, from a linear cavity Er-Yb double-clad fiber (EYDCF) laser, is demonstrated. Additionally, the deposition of the material as a thin film covering a fiber micro-ball lens (MBL) structure is reported for the first time. The TiON coating is deposited by a direct current (DC) magnetron-sputtering technique. The MBL is inserted within the laser cavity in a reflection configuration, alongside a reflecting mirror. As a result, the coated fiber MBL simultaneously acts as a SA element for PQS laser pulses generation and as an interference filter for wavelength selection and tuning of the generated laser line. Tunable single-laser emission in a wavelength range limited by dual-wavelength laser generation at 1541.96 and 1547.04 nm is obtained. PQS laser pulses with a repetition rate from 18.67 to 124.04 kHz, minimum pulse duration of 3.57 µs, maximum peak power of 0.359 W, and pulse energy of 1.28 µJ were obtained in a pump power range from 1 to 1.712 W.
展示了使用氮氧化钛(TiON)薄膜作为可饱和吸收体(SA)元件,从线性腔掺铒镱双包层光纤(EYDCF)激光器产生被动调Q(PQS)激光脉冲。此外,首次报道了将该材料沉积为覆盖光纤微球透镜(MBL)结构的薄膜。TiON涂层通过直流(DC)磁控溅射技术沉积。MBL以反射配置与反射镜一起插入激光腔内。结果,涂覆的光纤MBL同时充当用于产生PQS激光脉冲的SA元件以及用于波长选择和调谐所产生激光线的干涉滤光片。在由1541.96和1547.04 nm处的双波长激光产生所限制的波长范围内获得了可调谐单激光发射。在1至1.712 W的泵浦功率范围内,获得了重复率为18.67至124.04 kHz、最小脉冲持续时间为3.57 µs、最大峰值功率为0.359 W以及脉冲能量为1.28 µJ的PQS激光脉冲。