Self-optimising modelocked diode laser

在项目的第一部分首次成功演示了具有腔内空间光调制器（SLM）的自优化二极管激光器之后，我们现在的目标是优化并将这一概念扩展到具体目标。目标改进包括将实现的脉冲宽度减小到100fs以下，集成功率放大器以实现高平均和峰值功率，最后，直接针对示例应用优化系统。具体来说，我们定义了以下目标：1。通过自优化色散和光谱损耗控制，我们的目标是首次实现电泵浦二极管激光器的100 fs以下脉冲。为此，我们还计划实现具有更宽增益光谱的半导体活性材料。我们的被动模型锁定激光器将被额外同步调制，以确定主动调制是否会影响向更大带宽发射脉冲的啁啾。3. 我们期望通过改进外部压缩器的脉冲压缩来进一步缩短脉冲。通过在压缩机中实现第二个SLM，也可以压缩非线性啁啾组件。为了获得与应用相关的输出功率，我们将在系统中实现一个锥形二极管激光放大器。5. 在放大器实现后，将放大器的电流控制纳入进化算法，以分析是否可以使用放大器的自相位调制来获得更大的带宽，从而在压缩后获得更短的脉冲。最后一个目标是使自优化系统在实例应用中成功运行。

After the first successful demonstration of a self optimising diode laser with an intracavity spatial light modulator (SLM) in the first part of the project, we now aim to optimise and extend this concept towards concrete goals. The target improvements include a reduction of the achieved pulse widths below 100fs, the integration of power amplifiers to achieve high average and peak powers and, finally, the optimisation of the system directly for examplary applications. In detail, we define the following goals:1. With self optimising dispersion and spectral loss control we aim to realise for the first time sub-100 fs pulses with electrically pumped diode lasers. For this purpose we also plan to implement semiconductor active materials with extra broad gain spectra.2. Our passively modelocked lasers will be additionally synchronously modulated in order to determine whether active modulation might influence the chirp towards a larger bandwidth of the emitted pulses. 3. We expect a further shortening of the pulses by improving the pulse compression with the external compressor. By implementing a second SLM into the compressor, also nonlinear chirp components will be compressed.4. To achieve application relevant output power, we will implement a tapered diode laser amplifier into the system. 5. After implementation of the amplifier, the current control of the amplifier will be included into the evolutionary algorithm in order to analyse whether self phase modulation in the amplifier can be used to obtain larger bandwidths and thus shorter pulses after compression.6. The last goal is the successful operation of the self optzimising system in examplary applications.