Barh A, Ghosh S, Varshney R K, Pal B P
Department of Physics, Indian Institute of Technology Delhi, New Delhi, 110016, India.
Opt Express. 2013 Apr 22;21(8):9547-55. doi: 10.1364/OE.21.009547.
Design of a mid-wave IR (MWIR) broad-band fiber-based light source exploiting degenerate four-wave mixing (D-FWM) in a meter long suitably designed highly nonlinear (NL) chalcogenide microstructured optical fiber (MOF) is reported. This superior FWM bandwidth (BW) was obtained through precise tailoring of the fiber's dispersion profile so as to realize positive quartic dispersion at the pump wavelength. We consider an Erbium (Er(3+)) - doped continuous wave (CW) ZBLAN fiber laser emitting at 2.8 μm as the pump source with an average power of 5 W. Amplification factor as high as 25 dB is achievable in the 3 - 3.9 μm spectral range with average power conversion efficiency > 32%.
报道了一种基于中波红外（MWIR）宽带光纤光源的设计，该光源利用了在一米长的经过适当设计的高非线性（NL）硫系微结构光纤（MOF）中的简并四波混频（D-FWM）。通过精确调整光纤的色散分布，在泵浦波长处实现正四次色散，从而获得了这种优异的四波混频带宽（BW）。我们将发射波长为2.8μm、平均功率为5W的掺铒（Er(3+)）连续波（CW）ZBLAN光纤激光器作为泵浦源。在3 - 3.9μm光谱范围内，平均功率转换效率> 32%时，放大倍数可达25dB。
