Title :
Novel all-electrical scheme for dynamic semiconductor laser-to-fibre coupling control
Author :
Andrekson, Peter A. ; Alping, Arne
Author_Institution :
Chalmers University of Technology, Department of Electrical Measurements, Gothenburg, Sweden
Abstract :
An all-electrical scheme to maintain the optimum coupling condition in semiconductor laser-to-fibre coupling is described. A small deviation (¿¿) of the optimum laser-to-fibre distance severely degrades the laser performance in terms of, for example, output power, longitudinal mode spectrum and pulse response. The scheme employs the electrical noise of the laser as a distance sensor in a control loop that maintains the optimum laser-to-fibre distance in the presence of thermal or mechanical disturbances.
Keywords :
closed loop systems; optical communication equipment; optical couplers; piezoelectric transducers; position control; all-electrical scheme; closed loop systems; control loop; distance sensor; dynamic coupling control; longitudinal mode spectrum; mechanical disturbances; optimum coupling distance; output power; pulse response; semiconductor laser-to-fibre coupling;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870884
