Improving resolution of grating-coupled external cavity quantum cascade laser without sacrificing time by leveraging transformer encoder

The wavelength of a grating-coupled EC-QCL (external cavity quantum cascade laser) can be scanned using a motorized stage on which the diffraction grating is mounted. The speed of the motor affects the resolution of the spectrum. The resolution of the laser signal and the speed of the motor are inversely proportional; as the speed of the motor increases, the resolution decreases. Nevertheless, it is desirable to both increase the motor speed (hence reducing the analysis time) and achieve high resolution. Within the scope of this research, we conducted a new theoretical study that will enable this situation. For this purpose, we developed a Transformer Encoder based model inspired by Bidirectional Encoder Representations from Transformers (BERT) and demonstrated that the model injects correct information into the low resolution signal in a fixed interval.