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提出了一种基于单壁碳纳米管/聚酰亚胺复合材料薄膜和马赫-曾德尔型滤波器的多波长被动锁模掺铒光纤激光器。该环形腔掺铒光纤激光器以980nm的激光二极管作为抽运源,3.2m掺铒光纤作为增益介质,单壁碳纳米管作为可饱和吸收锁模器件。增加抽运功率到24mW时,得到中心波长为1559.3nm,3dB谱宽为1.4nm,平均输出功率为0.8mW的脉冲激光输出。然后在环形腔中,接入马赫-曾德尔型滤波器作为多波长选择器件,通过调整马赫-曾德尔型滤波器两臂光纤长度差,在室温下得到了3dB带宽内稳定的15个波长激光脉冲输出,波长间隔为0.1nm,连续0.5h观察,脉冲激光输出稳定。
A multi-wavelength passive mode-locked erbium-doped fiber laser based on single-walled carbon nanotube / polyimide composite film and Mach-Zehnder filter is proposed. The ring cavity erbium-doped fiber laser with 980nm laser diode as a pumping source, 3.2m erbium-doped fiber as a gain medium, single-walled carbon nanotubes as a saturable absorption mode-locking device. When pumping power is increased to 24mW, a pulsed laser output with a center wavelength of 1559.3nm, a 3dB spectral width of 1.4nm and an average output power of 0.8mW is obtained. Then, a Mach-Zehnder filter is inserted into the annular cavity as a multi-wavelength selective device, and a 15-wavelength laser with a stable 3dB bandwidth is obtained at room temperature by adjusting the difference of the fiber lengths of the two Mach-Zehnder filters Pulse output, wavelength interval of 0.1nm, 0.5h continuous observation, pulse laser output stable.