| 摘要 |
PROBLEM TO BE SOLVED: To provide a widely tunable laser that is easy to be manufactured and allows for narrow line-width across a full optical wavelength spectrum.SOLUTION: A multi-channel wavelength tunable laser comprises: a frequency selective optical multiplexer; a plurality of channel paths;and a plurality of optical regulators. The frequency selective optical multiplexer comprises: a plurality of channel terminals for receiving/transmitting light; a plurality of channel waveguide blocks, each channel waveguide block comprising at least one reflectively terminated channel waveguide; and an optical coupling element optically coupling the plurality of channel terminals with the plurality of channel waveguide blocks, each of the channel waveguides of the plurality of channel waveguide blocks having a different length. Each channel path is coupled to a respective channel terminal and comprises a gain element, a phase element and a reflective element. Each optical regulator is configured to regulate the channel waveguide of each of the channel waveguide blocks.SELECTED DRAWING: Figure 1 |
