Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity.

@article{LewoczkoAdamczyk2015UltranarrowLD,
  title={Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity.},
  author={Wojciech Lewoczko-Adamczyk and Christoph Pyrlik and Johannes H{\"a}ger and Sven Schwertfeger and Andreas Wicht and Achim Peters and Goetz Erbert and G{\"u}nther Tr{\"a}nkle},
  journal={Optics express},
  year={2015},
  volume={23 8},
  pages={9705-9}
}
We present a compact, ultra-narrow-linewidth semiconductor laser based on a 780 nm distributed feedback diode laser optically self-locked to a mode of an external monolithic confocal Fabry-Perot resonator. We characterize spectral properties of the laser by measuring its frequency noise power spectral density. The white frequency noise levels at 5 Hz(2)/Hz above a Fourier frequency as small as 20 kHz. This noise level is more than five orders of magnitude smaller than the noise level of the… CONTINUE READING