1064nm超短腔DBR单频掺镱硅酸盐光纤激光器

提出了一种基于高掺杂硅酸盐增益光纤、输出波长为1 064nm的超短腔单频光纤激光器.该单频光纤激光器采用分布布拉格反射式腔型结构,有效腔长为2cm,其增益介质为1.1cm长的高浓度掺Yb3+光纤.通过恰当的温度控制,获得了线宽为4.8kHz的稳定单频激光输出.当注入泵浦光为378mW时,输出功率为13mW,斜效率为3.4%.在频率大于1 MHz时,测得该光纤激光器的相对噪声强度值约为-132dB/Hz.采用主振荡功率放大结构,对该单频光纤激光器的输出功率进行放大.当放大增益光纤长度选取为56cm时,得到了325mW的最大输出功率,其斜效率为52.8%.

1064 nm Ultrashort Cavity Single-frequency Distributed Bragg Reflector Yb-doped Silica Fiber Laser

An ultrashort cavity single-frequency Distributed Bragg Reflector (DBR) laser operating at 1064 nm was proposed with a cavity length of 2 cm,and the gain medium is a 1.1 cm long highly Yb-doped silica fiber.With a proper temperature control,the stable single-frequency laser with a linewidth of 4.8 kHz was achieved.The maximum output power of the DBR fiber laser is 13 mW with a slope efficiency of 3.4% relative to the launched pump power of 378 mW.The measured relative intensity noise is about -132 dB/Hz at frequencies of over 1 MHz.The master oscillator power-amplifier structure was used to amplify the output power of the DBR laser.When the length of the amplification gain laser is given as 56 cm,the output power is scaled up to 325 mW with a slope efficiency of 52.8%.