Patent ID: 9083469
Filing Date: 2015-07-14
Classification: H01S,H04B,H04J

Abstract:
1. A device for controlling a lasing wavelength of a tunable laser comprising: a wavelength division multiplexer/de-multiplexer (WD MUX/DE-MUX); a single mode fiber (SMF) being connected to the WD MUX/DE-MUX; a tunable laser (TL) for outputting a first light to the WD MUX/DE-MUX; an optical coupler, being provided between the WD MUX/DE-MUX and the TL, for being inputted and outputting a reflected optical component of the first light which is backscattered or reflected from the SMF; a photodiode (PD), being connected to the optical coupler, for converting the reflected optical component into an electric signal upon receipt thereof and outputting the converted electric signal; a wavelength identifier (WLI), being connected to the PD, for identifying a difference between the lasing wavelength of the TL and a transmission wavelength of the WD MUX/DE-MUX upon receipt of the converted electric signal and outputting an identifying signal; and a wavelength controller (WLC), being connected to the WLI, for controlling the wavelengths of the TL upon receipt of the identifying signal.