OPTICAL TRANSMITTER, TRANSMISSION METHOD, OPTICAL RECEIVER AND RECEPTION METHOD

摘要

The present invention relates to the field of communications technologies, and discloses an optical transmitter and a transmission method, and an optical receiver and a reception method. When a first laser in N lasers is switched to a second idle laser in M lasers, a wavelength of a wavelength-selective optical element to which the first laser is coupled is adjusted from a first wavelength to a second wavelength, and the second wavelength is different from the N wavelengths. Similarly, when a first optical receiver in N optical receivers is switched to a second idle optical receiver in M optical receivers, a wavelength of a wavelength-selective optical element to which the first optical receiver is coupled is adjusted from a first wavelength to a second wavelength, and the second wavelength is different from the N wavelengths. According to the foregoing technical solution, in embodiments of the present invention, complexity of an optical transmitter and an optical receiver is decreased, an extra power loss is reduced, and output optical power is improved.