| 摘要 |
The present invention relates to a tunable laser source for a WDM-PON using a self-seeding F-P LD. The tunable laser source for the WDM-PON using the self-seeding F-D LD comprises the following: a Bias-Tee (10) which generates a DC signal; a laser diode (20) connected to an output terminal of the Bias-Tee (10); a modulator (30) which supplies a pulse signal to the laser diode (20); an optical circulator (40) connected to the laser diode (20); a central office (CO) which includes a PC (50) and a coupler (60) connected to the optical circulator (40), a filter (70) connected to the PC (50), and an SMF (80) connected between the coupler (60) and the filter (70) to perform a light coupling and a light distribution; a remote node (RN) connected to the central office (CO); and an optical network unit (ONU) connected to the remote node (RN). Since the tunable laser source uses the inexpensive F-D LD and includes only the optical circulator, a polarization controller, a tunable BPF having a line width of 0.8 nm, and the 50 : 50 coupler, the tunable laser source can easily control a wavelength at low cost in the WDM-PON and is very cost-effective. Since the relative noise density (RIN) meets a RIN threshold capable of transmitting a signal at a speed of 10 Gb/s in a wavelength band having good performance, the tunable laser source can be efficiently used even in high speed transmission of 10 Gb/s. Also, the tunable laser source can be provided by using a novel self-seeding F-P LD, which can be applied to the WDM-PON. |
