Phase noise in a laser with output coupling
Abstract
An improved method of calculating the linewidth of a laser oscillator due to phase noise is proposed. The fluctuation in the output amplitude that leads to the phase diffusion is calculated as the amplified thermal and the quantum noise which are deltacorrelated in time. The saturated gain distribution along the cavity axis that is consistent with the output coupling at the end surfaces is taken into account in calculating the amplification of the noises. The resulting linewidth formula differs somewhat from the conventional formula.
 Publication:

IEEE Journal of Quantum Electronics
 Pub Date:
 July 1984
 DOI:
 10.1109/JQE.1984.1072472
 Bibcode:
 1984IJQE...20..814U
 Keywords:

 Coupled Modes;
 Laser Outputs;
 Laser Stability;
 Noise Spectra;
 Optical Coupling;
 Phase Deviation;
 Laser Cavities;
 Optical Pumping;
 Power Gain;
 Quantum Theory;
 Reflectance;
 Spectral Line Width;
 Thermal Noise;
 Lasers and Masers