Title :
Laser diode linewidth measurement by means of self-mixing interferometry
Author :
Giuliani, Guido ; Norgia, Michele
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
Abstract :
We demonstrate an easy-to-implement method to determine the linewidth of a laser diode based on the measurement of phase noise in a self-mixing interferometer. The method features a self-aligned experimental setup with an overall length much shorter than the laser coherence length; the method does not require RF measurements and gives results in agreement with the self-heterodyne technique.
Keywords :
amplitude modulation; laser beams; laser feedback; laser variables measurement; light coherence; light interferometry; optical modulation; optical noise; semiconductor lasers; RF measurements; laser coherence length; laser diode; laser diode linewidth measurement; linewidth; overall length; phase noise; self-aligned experimental setup; self-heterodyne technique; self-mixing interferometer; self-mixing interferometry; Diode lasers; Fluctuations; Frequency; Laser feedback; Laser noise; Noise measurement; Optical feedback; Optical interferometry; Phase measurement; Phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
