Title :
Increased sampling rate with Hilbert transformation for AWG phase error measurement in frequency domain
Author :
Takada, Kazumasa ; Yokota, Tomoyuki ; Hirose, Tatsuya
Author_Institution :
Dept. of Electron. Eng., Gunma Univ., Kiryu
Abstract :
A digital upsampling method for measuring arrayed waveguide grating (AWG) phase error in the frequency domain is reported. This technique enabled measurement of phase error with variations of les3.2times10-3 rad even when an 80 cm-long delay line is added to one arm of the interferometer.
Keywords :
Hilbert transforms; arrayed waveguide gratings; frequency-domain analysis; light interferometry; optical delay lines; optical information processing; optical testing; signal sampling; AWG phase error measurement; Hilbert transformation; arrayed waveguide grating; auxiliary interferometer; digital upsampling method; frequency domain analysis; optical delay line; sampling rate; size 80 cm;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081836
