Title :
Optical frequency sweeper using an optical ring circuit with a tunable injection-locking filter
Author :
Ishikawa, M. ; Yasaka, H. ; Kano, F. ; Yoshikuni, Y.
Author_Institution :
NTT Photonics Lab., Atsugi, Japan
Abstract :
We report an optical-frequency sweeper based on an optical ring circuit containing an optical-frequency shifter and a delay-line fiber. High signal-to-noise ratio (30 dB) is achieved by introducing a tunable injection-locking filter (TILF), The TILF utilizes a tunable laser (distributed Bragg reflector (DBR) laser), which is injection locked to an input signal light. We have achieved a total sweep frequency of 141 GHz by switching the longitudinal modes of the DBR laser.
Keywords :
distributed Bragg reflector lasers; laser modes; laser tuning; optical delay lines; optical filters; optical frequency conversion; optical noise; ring lasers; wavelength division multiplexing; 144 GHz; DBR laser; delay-line fiber; high signal-to-noise ratio; injection locked; input signal light; longitudinal modes; optical frequency sweeper; optical ring circuit; total sweep frequency; tunable injection-locking filter; tunable laser; Delay; Distributed Bragg reflectors; Fiber lasers; Frequency; Laser mode locking; Optical fiber filters; Optical filters; Ring lasers; Signal to noise ratio; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
