| 摘要 |
The present invention discloses a method for controlling a modulation depth of a pilot signal, a transmitter, and a pilot locking apparatus. The transmitter includes: a pilot loading apparatus, an optical modulator, and a pilot locking apparatus. The pilot locking apparatus is configured to determine a pilot operating point that is currently on a response curve and that is of the optical modulator, and a target initial amplitude of an electrical pilot signal, and control the pilot loading apparatus to adjust an initial amplitude of the electrical pilot signal to the target initial amplitude, where if a value of the pilot operating point is less than a first threshold, the target initial amplitude of the electrical pilot signal is determined based on a correspondence between a modulation depth of a one-frequency-multiplication component of an optical pilot signal that is output after the electrical pilot signal is modulated by the optical modulator and the initial amplitude of the electrical pilot signal, and a target modulation depth of the optical pilot signal. In embodiments of the present invention, a pilot modulation depth can be quickly and effectively adjusted, and then a pilot can be locked at an expected modulation depth. |
