| 摘要 |
PURPOSE: To make it possible to supply a clean optical carrier wave by comprising a laser cavity including an active medium, a means which pumps up the active medium and a lattice resonator having a narrow area characteristic in a guided wave in the laser cavities and selecting a laser operation mode demanded by the lattice resonator. CONSTITUTION: A ring cavity laser comprises an erbium-doped optical fiber where the laser cavity is pumped up with a pump laser 10 and transmitted to an output fiber 28 by way of a coupler through an optical fiber 12. An optical isolator 16 is provided in the ring so as to depress the waves of the ring to one direction and the output is transmitted to a first mirror re Pelot by way of the optical fiber and then is connected to a second mirror 4 by way of an optical fiber 22. Wavelength selectivity is available in a pair of series unequal length Fabry-Perot interferometer. Owing to this construction. The energy produced from the laser provides a clean optical carrier wave for signal transmission. |
