Title :
Laser diode linewidth measurement by means of self-mixing interferometry
Author :
Giuliani, G. ; Norgia, M. ; Donati, S.
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
Abstract :
We have demonstrated a new technique for the measure of the linewidth of laser diodes (LD), based on the self-mixing effect. The linewidth is obtained from a measurement of the interferometric phase noise around the switching of the sawtooth-like signal waveform. The method can be applied to all LDs without isolator, it does not require any RF equipment nor long fiber of adjustable length and it is in agreement with the self-heterodyne technique
Keywords :
heterodyne detection; laser noise; light interferometry; optical testing; phase noise; semiconductor device testing; semiconductor lasers; spectral line breadth; LDs; RF equipment; interferometric phase noise; laser diode linewidth measurement; long fiber; sawtooth-like signal waveform; self-heterodyne technique; self-mixing effect; self-mixing interferometry; Diode lasers; Fluctuations; Frequency; Laser noise; Noise measurement; Optical interferometry; Oscilloscopes; Phase measurement; Phase noise; Shape measurement;
Conference_Titel :
LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5634-9
DOI :
10.1109/LEOS.1999.811939
