Canagasabey Albert, Corbari Costantino, Zhang Zhaowei, Kazansky Peter G, Ibsen Morten
Optoelectronics Research Centre, University of Southampton, SO17 1BJ, United Kingdom.
Opt Lett. 2007 Jul 1;32(13):1863-5. doi: 10.1364/ol.32.001863.
Broadband tunability of the second-harmonic wavelength is achieved in periodically poled silica fibers. A wavelength tuning range of almost 45 nm of the fundamental wave is demonstrated through mechanical compression tuning of the quasi-phase-matched periodic structure. The uniform strain applied along the entire periodic structure enables the spectral profile and the conversion efficiency of the generated second harmonic to be preserved for the full tuning range. To our knowledge, the achieved tuning range realized through this technique is far greater than that possible with uniform periodically poled crystals.
在周期性极化石英光纤中实现了二次谐波波长的宽带可调谐性。通过对准相位匹配周期结构进行机械压缩调谐，展示了基波近45 nm的波长调谐范围。沿整个周期结构施加的均匀应变使得在整个调谐范围内能够保持所产生二次谐波的光谱轮廓和转换效率。据我们所知，通过这种技术实现的调谐范围远大于均匀周期性极化晶体所能达到的范围。
