Title :
Novel high precision alignment technique for polarisation maintaining fibres using a frequency modulated tunable laser
Abstract :
A precision alignment technique for polarisation-maintaining, fibres is described using a frequency modulated tunable laser in combination with phase sensitive detection. The effect of residual intensity modulation is overcome by detecting the signal at twice the modulation frequency. An alignment accuracy of better than 0.2 degrees was achieved.
Keywords :
birefringence; distributed feedback lasers; frequency modulation; laser beam applications; light polarisation; optical fibres; optical modulation; position control; semiconductor junction lasers; DFB lasers; alignment accuracy; birefringence; frequency modulated tunable laser; lock-in amplifier; modulation frequency; phase sensitive detection; polarisation-maintaining; precision alignment technique; residual intensity modulation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901299
