Broadband and efficient adiabatic three-wave-mixing in a temperature-controlled bulk crystal.
Broadband and efficient adiabatic three-wave-mixing in a temperature-controlled bulk crystal.
复制标题
DOI：
10.1364/oe.26.004448
复制
发表时间：
2018-02
期刊：
影响因子：
3.8
通讯作者：
A. Markov;A. Mazhorova;H. Breitenborn;A. Bruhacs;M. Clerici;D. Modotto;O. Jedrkiewicz;P. di Trapani;A. Major;F. Vidal;R. Morandotti
中科院分区：
文献类型：
--
作者：
A. Markov;A. Mazhorova;H. Breitenborn;A. Bruhacs;M. Clerici;D. Modotto;O. Jedrkiewicz;P. di Trapani;A. Major;F. Vidal;R. Morandotti
非线性相互作用通常用于访问标准激光系统未覆盖的波长。特别地，光学参量放大（OPA）是产生广泛可调谐光的强大技术。然而，OPA的常见实现遭受公知的权衡，要么实现窄光谱的高效率，要么在宽带宽上实现低效转换。这个缺点可以使用绝热过程来解决。在这里，我们展示了一种新的技术朝着这个方向，基于温度控制的相互作用波之间的相位失配。使用这种方法，我们证明，通过定制的温度分布，转换效率增加了21%，达到最大值57%，同时扩展带宽超过300 nm。我们的技术可以很容易地提高目前的OPA系统的性能。
Nonlinear interactions are commonly used to access to wavelengths not covered by standard laser systems. In particular, optical parametric amplification (OPA) is a powerful technique to produce broadly tunable light. However, common implementations of OPA suffer from a well-known trade-off, either achieving high efficiency for narrow spectra or inefficient conversion over a broad bandwidth. This shortcoming can be addressed using adiabatic processes. Here, we demonstrate a novel technique towards this direction, based on a temperature-controlled phase mismatch between the interacting waves. Using this approach, we demonstrate, by tailoring the temperature profile, an increase in conversion efficiency by 21%, reaching a maximum of 57%, while simultaneously expanding the bandwidth to over 300 nm. Our technique can readily enhance the performances of current OPA systems.