Mid-IR supercontinuum generation in Tm/Ho codoped fiber amplifier

Mid-IR supercontinuum generation in Tm/Ho codoped fiber amplifier
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Tm/Ho 共掺光纤放大器中的中红外超连续谱产生

DOI:
10.1088/1612-2011/10/5/055107
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发表时间:
2013-05
影响因子:
1.7
通讯作者:
Liu, Z. J.
Liu, Z. J.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Yang, W. Q.;Zhang, B.;Hou, J.;Xiao, R.;Jiang, Z. F.;Liu, Z. J.

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我们展示了全光纤集成的Tm/Ho共掺光纤放大器中产生的中红外超连续谱,其中共掺光纤既是非线性的,也是增益介质。观测到的超连续谱范围从1760到2600 nm,具有极高的光谱平坦度,3 dB带宽为635 nm(从1845到2480 nm)。在Tm/Ho共掺光纤中,除了非线性光学过程外,Tm ~(3+)和Ho ~(3+)离子在中红外超连续谱的产生中也起着重要的作用。Tm ~(3+)的~ 3F_4-~ 3H_6跃迁在1.8-2.1 μm光谱区发射激光,Ho ~(3+)的~ 5I_7-~ 5I_8跃迁在2.1 μm附近发射激光,Tm ~(3+)的~ 3H_4-~ 3H_5跃迁在2.2-2.5 μm光谱区发射激光。所有这些能级跃迁都有助于产生超连续谱。
We demonstrate all-fiber-integrated mid-IR supercontinuum generation in a Tm/Ho codoped fiber amplifier, where the codoped fiber is both nonlinear and a gain medium. The observed supercontinuum spectrum ranges from 1760 to 2600 nm and has an extremely high spectral flatness, with a 3 dB bandwidth ∼635 nm (from 1845 to 2480 nm). In the Tm/Ho codoped fiber, as well as the nonlinear optical processes, the Tm3+ and Ho3+ ions also play important roles in mid-IR supercontinuum generation. The 3F4–3H6 transition for Tm3+ radiates a laser in the 1.8–2.1 μm spectral region, the 5I7–5I8 transition for Ho3+ radiates a laser around 2.1 μm and the 3H4–3H5 transition for Tm3+ radiates a laser in the 2.2–2.5 μm spectral region. All of these energy level transitions contribute towards supercontinuum generation.
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