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研制了高功率全光纤结构2μm波段掺铥皮秒脉冲光纤激光器。该激光器采用了主振荡功率放大(MOPA)结构设计,种子源采用790nm的多模半导体激光器作为抽运源、双包层掺铥光纤作为激光增益介质、半导体可饱和吸收镜(SESAM)作为锁模器件,从而实现了重复频率为10.4MHz的皮秒激光脉冲输出,其最大平均输出功率为15mW。种子源经过一级掺铥光纤放大器后,获得了1.1W高平均功率输出,相应的单脉冲能量高达105nJ,激光脉冲宽度为9ps,峰值功率为11.6kW。此时测得激光脉冲的中心波长为1963nm,3dB光谱带宽为0.5nm。
Developed a high power all-fiber structure 2μm band-doped picosecond picosecond pulse fiber lasers. The laser uses the main oscillator power amplifier (MOPA) structure design, the seed source adopts a 790nm multi-mode semiconductor laser as a pumping source, a double cladding doped fiber as a laser gain medium, and a semiconductor saturable absorption mirror (SESAM) Devices to achieve a picosecond laser pulse repetition rate of 10.4MHz output, the maximum average output power of 15mW. The seed source has a 1.1W high average power output after being doped by an optical fiber amplifier. The corresponding single pulse energy is as high as 105nJ, the laser pulse width is 9ps and the peak power is 11.6kW. The central wavelength of the laser pulse measured at this time was 1963 nm, and the 3dB spectral bandwidth was 0.5 nm.