阅读说明：本技术 一种波长对准方法、装置、发射器及光网络系统 (Wavelength alignment method, device, transmitter and optical network system ) 是由 罗小东 张超 李海源 唐松 李明洋 于 2020-07-20 设计创作，主要内容包括：本申请实施例提供一种波长对准的方法及装置,应用于包括激光器和滤波器的啁啾管理激光器,所述方法包括：根据所述滤波器输出光功率的大小和线性度确定锁定初值,其中,所述锁定初值用于表征所述滤波器输出的光功率与所述激光器输出的光功率的目标比值；根据所述锁定初值确定调整所述激光器的温度,以实现所述激光器和所述滤波器的波长对准。本申请的一些实施例提供了一种确定锁定初值的实施例,与相关技术相比本申请的实施例不需要借助眼图仪等测试系统就可以确定啁啾管理激光器的锁定初值且在依据锁定初值调整激光器温度时保证激光器输出的1bits和0bits信号的的输出光功率,改善了啁啾管理激光器的自动锁定过程。(The embodiment of the application provides a method and a device for wavelength alignment, which are applied to a chirp management laser comprising a laser and a filter, wherein the method comprises the following steps: determining a locking initial value according to the magnitude and the linearity of the output optical power of the filter, wherein the locking initial value is used for representing a target ratio of the optical power output by the filter to the optical power output by the laser; and determining and adjusting the temperature of the laser according to the initial locking value so as to realize the wavelength alignment of the laser and the filter. Some embodiments of the present application provide an embodiment for determining a locking initial value, and compared with the related art, the embodiment of the present application may determine the locking initial value of a chirp management laser without using a test system such as an eye-pattern analyzer, and when the temperature of the laser is adjusted according to the locking initial value, the output optical power of 1bits and 0bits signals output by the laser is ensured, thereby improving the automatic locking process of the chirp management laser.)

1. A method of wavelength alignment for a chirp management laser comprising a laser and a filter, the method comprising:

determining a locking initial value according to the magnitude and the linearity of the output optical power of the filter, wherein the locking initial value is used for representing a target ratio of the optical power output by the filter to the optical power output by the laser;

and determining and adjusting the temperature of the laser according to the initial locking value so as to realize the wavelength alignment of the laser and the filter.

2. The method of claim 1, wherein the initial lock value comprises a point on an alignment interval, wherein the alignment interval is on a low frequency side of a point where the filter outputs a maximum optical power.

3. The method of claim 2, wherein the alignment interval is a linear region.

4. The method of claim 1, wherein said determining a locking threshold based on the magnitude and linearity of the output optical power from said filter comprises:

adjusting the output frequency of the laser, and recording the output optical power of the filter corresponding to the frequency;

obtaining output optical power values of the filter at a plurality of the frequencies;

Determining the linearity of the output light power value of the filter at a low-frequency side position of the maximum value of the output light power of the filter;

and acquiring the ratio of the output light power of the laser to the output light power of the filter as an initial locking value according to the linearity.

5. The method as claimed in claim 4, wherein said obtaining a ratio of output optical powers of the laser and the filter as initial locking values according to the linearity comprises: and obtaining the initial locking value when the linearity is determined to meet a judgment condition.

6. The method of claim 1, wherein said determining from said initial lock value to adjust the temperature of said laser to achieve wavelength alignment of said laser and said filter comprises: and locking the output optical power of the zero bit signal and the one bit signal output by the laser under the adjusted first temperature condition so as to realize the wavelength alignment of the laser and the filter.

7. A method as claimed in claim 6, wherein the output optical powers of the zero and one bit signals are locked by locking the output optical power and the extinction ratio of the laser.

8. The method of claim 7, wherein said locking the output optical power of the zero-bit signal and the one-bit signal by locking the output optical power and the extinction ratio of the laser comprises:

locking the average power of the laser to a target power by power control;

and adjusting the driving current of the laser to control the extinction ratio to be kept unchanged.

9. The method of claim 8, wherein the drive current of the laser is adjusted by temperature fitting a curve or a look-up table.

10. A wavelength alignment device, the device comprising:

a laser backlight detection unit configured to detect an output optical power of the laser;

a filter backlight detection unit configured to detect an output optical power of the filter;

the control unit is configured to determine a locking initial value according to the output optical power of the filter and linearity, store the locking initial value, determine to adjust the temperature of the laser according to the locking initial value when the temperature changes, and lock the output optical powers of a zero bit signal and a one bit signal output by the laser in the temperature adjustment process, wherein the locking initial value comprises a target ratio of the optical powers of the filter and the laser;

A temperature adjustment unit configured to adjust the laser die temperature.

11. A transmitter, characterized in that it comprises a directly modulated laser, a filter and a wavelength alignment device according to claim 10.

12. A transceiver comprising a directly modulated laser, a filter, a detector and a wavelength alignment device according to claim 10.

13. An optical network system, characterized in that the optical network system comprises an optical line terminal and an optical network unit, wherein the optical line terminal and/or the optical network unit comprises at least a transmitter according to claim 11.

14. An optical network system, characterized in that the optical network system comprises an optical line terminal and an optical network unit, wherein the optical line terminal and/or the optical network unit comprises at least a transceiver according to claim 12.