High power, widely tunable, narrowband superfluorescent source at 2 μm based on a monolithic Tm-doped fiber amplifier.
High power, widely tunable, narrowband superfluorescent source at 2 μm based on a monolithic Tm-doped fiber amplifier.
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DOI：
10.1364/oe.23.003382
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发表时间：
2015-02
期刊：
影响因子：
3.8
通讯作者：
Xiongfei Wang;Xiaoxi Jin;P. Zhou;Xiao-lin Wang;H. Xiao;Zejin Liu
中科院分区：
文献类型：
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作者：
Xiongfei Wang;Xiaoxi Jin;P. Zhou;Xiao-lin Wang;H. Xiao;Zejin Liu
我们提出了一种采用单片掺铥光纤放大器（TDFA）的近2μm宽可调窄带超荧光源，输出功率超过250 W。使用带有窄带可调谐带通滤波器的宽带超荧光源作为种子源。种子源的光谱可在 ~1930-2030 nm 范围内调谐，半峰全宽 (FWHM) 为 ~1.7 nm。掺铥光纤放大器将种子源的功率放大到250 W以上，调谐范围约为35 nm（1966-2001 nm），半高宽约为1.5-2.0 nm，斜率效率约为0.50。输出功率受到可用泵浦功率的限制，调谐范围受到其他波长下放大器自发发射的限制。如果向放大器发射更多的泵浦功率，可以实现更高的输出功率，并且通过优化TDFA的参数可以进一步提高调谐范围。据我们所知，这是首次对平均输出功率超过 250 W 的 2 μm 宽可调窄带超荧光源进行演示。
We present a widely tunable narrowband superfluorescent source near 2 μm employing a monolithic Tm-doped fiber amplifier (TDFA), and the output power exceeds 250 W. A broadband superfluorescent source with a narrowband tunable band pass filter was used as the seed source. The spectra of the seed source can be tuned in a range of ~1930-2030 nm with full width at half maximum (FWHM) of ~1.7 nm. The Tm-doped fiber amplifier scales up the power of the seed source to a level of more than 250 W with a tuning range of ~35 nm (1966-2001 nm) and a FWHM of ~1.5-2.0 nm, and the slope efficiency is about 0.50. The output power is limited by the available pump power, and the tuning range is limited by the amplifier spontaneous emission at other wavelengths. Higher output power can be achieved if launching more pump power into the amplifier, and the tuning range can be further improved by optimizing the parameters of the TDFA. To the best of our knowledge, this is the first demonstration on a widely tunable narrowband superfluorescent source at 2 μm with average output power exceeding 250 W.