Title :
High-accuracy laser-wavelength detection using a synchro-scanned optical disk filter
Author :
Katagiri, Y. ; Aida, K. ; Tachikawa, Y. ; Nagaoka, S. ; Abe, H. ; Ohira, F.
Author_Institution :
NTT Opto-Electron. Labs., Tokyo, Japan
Abstract :
A simple laser-wavelength detection method is presented based on time-domain signal analysis using a continuously tunable, wide-band synchro-scanned optical disk filter. A differential signal is defined between two light powers monitored ground the time corresponding to the laser wavelength of interest to detect the slight wavelength deviation. A maximum detection accuracy of /spl plusmn/100 MHz has been achieved using a filter with a 3-dB width of 0.83 nm.
Keywords :
laser variables measurement; measurement uncertainty; optical filters; synchronisation; wavemeters; continuously tunable wide-band synchro-scanned optical disk filter; differential signal; high-accuracy laser-wavelength detection; laser wavelength; laser-wavelength detection method; light powers; maximum detection accuracy; slight wavelength deviation detection; synchro-scanned optical disk filter; time-domain signal analysis; Diffraction gratings; Holographic optical components; Holography; Laser tuning; Monitoring; Optical filters; Optical interferometry; Power lasers; Tunable circuits and devices; Wideband;
Journal_Title :
Photonics Technology Letters, IEEE
