Filtering locking method and filtering locking device

Abstract

The invention provides a filtering locking method and a filtering locking system, which belong to the field of optical integrated communication, and aim to solve the problems that the cost and the complexity of a circuit are improved and the extraction of scrambling information is difficult to realize along with the increase of wave number in the prior wavelength locking technology. The filteringlocking method and the filtering locking system reduce the area of a circuit board and the complexity of a control circuit by using a method of centralized wavelength locking with single scrambling injection in an optical integrated device and an optical integrated circuit; the filtering locking method and the filtering locking system accurately extract a weak scrambling signal through a mode of combining analog filtering with digital filtering; and when the frequency of a disturbance signal changes, a digital filter can finish the extraction of the disturbance signal by only adjusting corresponding parameters, which has strong portability and upgradability. For more than two of cascade connection of PIDs / PICs of a multi-wavelength module, the method can be adopted to share a filtering locking device to share a time-division multiplexing mode to perform wavelength locking on more than two optical waves.

Description

technical field [0001] The invention relates to the field of optical integration, in particular to a method and device for filtering and locking in optical integrated devices / optical integrated circuits. Background technique [0002] With the continuous development of optical communication services, the integration of optical devices is getting higher and higher. For example: if figure 1 As shown, photointegrated devices (PIDs) and photonic integrated circuits (PICs) include arrays of lasers. The laser array integrates at least two lasers. [0003] The PID / PIC connection has a combiner. The multiplexer receives the lasers emitted by all lasers; it combines multiple lasers into a beam of optical signals. [0004] The multiplexer is connected with an optical splitter, and the optical signal is transmitted through the optical splitter. During the transmission of the laser from the laser to the beam splitter, the wavelength of the laser will change with temperature. In ord...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that a unique disturbance frequency is added to each wave, resulting in increased cost and circuit complexity and difficulty in extracting effective scrambled signals, the embodiments of the present invention provide the following technical solutions:

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