CN-121995655-A - Phase control method and phased array laser terminal

CN121995655ACN 121995655 ACN121995655 ACN 121995655ACN-121995655-A

Abstract

The invention discloses a phase control method and a phased array laser terminal, wherein N target phase shifters with current voltage larger than first voltage or current voltage smaller than second voltage are selected from M phase shifters, a voltage adjustment mode is determined based on the current voltage, the first voltage and the second voltage of the M phase shifters under the condition that the current voltage of the target phase shifters meets preset conditions, the current voltage of the phase shifters is adjusted to be within a preset voltage range based on the voltage adjustment mode and the adjustment voltage, the current voltage of the target phase shifters is adjusted to be within the preset voltage range based on the adjustment voltage under the condition that the current voltage of the target phase shifters does not meet preset conditions, and the preset conditions are that the current voltage of the N target phase shifters is larger than the first voltage or the current voltage of the N target phase shifters is smaller than the second voltage, so that fluctuation and drop of combined beam light power are avoided while multi-path laser beam phase consistency is met.

Inventors

REN WEIJIE
SUN JIANFENG
HOU PEIPEI
ZHAO ZHUOQUN
ZHOU JIAN
Qu Daopeng

Assignees

上海卫星互联网研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (12)

1. A method of phase control, the method comprising: Selecting N target phase shifters with the current voltage being greater than a first voltage or with the current voltage being less than a second voltage from M phase shifters, wherein the first voltage is greater than the second voltage, M is a positive integer greater than or equal to N and greater than or equal to 2, and N is a positive integer greater than or equal to 1; Determining a voltage regulation mode based on the current voltages of the M phase shifters, the first voltages and the second voltages when the current voltages of the target phase shifters meet preset conditions; adjusting the current voltage of the target phase shifter to be within the preset voltage range based on the adjustment voltage under the condition that the current voltage of the target phase shifter does not meet the preset condition; the preset condition is that the current voltages of the N target phase shifters are all larger than the first voltage, or the current voltages of the N target phase shifters are all smaller than the second voltage.
2. The method of claim 1, wherein the preset condition is that the current voltage of each of the N target phase shifters is greater than the first voltage; The determining a voltage adjustment mode based on the current voltages of the M phase shifters, the first voltage, and the second voltage includes: Judging whether the current voltage of the M phase shifters is larger than a third voltage, wherein the third voltage is a sum of a first difference value and a preset fourth voltage, the first difference value is a difference value between the second voltage and the first voltage, and the fourth voltage is larger than the first voltage; And setting the voltage regulation mode as a first regulation mode under the condition that the current voltages of the M phase shifters are larger than the third voltage, otherwise setting the voltage regulation mode as a second regulation mode, wherein the first regulation mode is reducing regulation on the current voltages of the M phase shifters, and the second regulation mode is reducing regulation on the current voltages of the N target phase shifters.
3. The method of claim 2, wherein adjusting the current voltage of the phase shifter to be within a preset voltage range based on the voltage adjustment mode and the adjustment voltage comprises: When the voltage regulation mode is the first regulation mode, reducing the current voltages of the M phase shifters by the regulation voltage, and returning to the step of judging whether the current voltages of the M phase shifters are greater than a third voltage or not until the current voltages of the M phase shifters are all within the preset voltage range; And reducing the current voltages of the N target phase shifters by the adjusting voltage under the condition that the voltage adjusting mode is the second adjusting mode until the current voltages of the N target phase shifters are all in the preset voltage range.
4. The method of claim 1, wherein the preset condition is that the current voltage of each of the N target phase shifters is less than the second voltage; The determining a voltage adjustment mode based on the current voltages of the M phase shifters, the first voltage, and the second voltage includes: Judging whether the current voltage of the M phase shifters is smaller than a fifth voltage, wherein the fifth voltage is a sum of a second difference value and a preset sixth voltage, the second difference value is a difference value between the first voltage and the second voltage, and the sixth voltage is smaller than the second voltage; And setting the voltage regulation mode as a third regulation mode under the condition that the current voltages of the M phase shifters are smaller than the fifth voltage, otherwise setting the voltage regulation mode as a fourth regulation mode, wherein the third regulation mode is to increase and regulate the current voltages of the M phase shifters, and the fourth regulation mode is to increase and regulate the current voltages of the N target phase shifters.
5. The method of claim 4, wherein adjusting the current voltage of the phase shifter to be within a preset voltage range based on the voltage adjustment mode and the adjustment voltage comprises: when the voltage regulation mode is the third regulation mode, increasing the current voltages of the M phase shifters by the regulation voltage, and returning to the step of judging whether the current voltages of the M phase shifters are smaller than a fifth voltage until the current voltages of the M phase shifters are all within the preset voltage range; And under the condition that the voltage regulation mode is the fourth regulation mode, increasing the current voltages of the N target phase shifters by the regulation voltage until the current voltages of the N target phase shifters are all within the preset voltage range.
6. The method of claim 1, wherein adjusting the current voltage of the target phase shifter to be within the preset voltage range based on the adjustment voltage in the case where the current voltage of the target phase shifter does not satisfy the preset condition comprises: Reducing the current voltage of the first target phase shifter by the regulating voltage aiming at the first target phase shifter with the current voltage larger than the first voltage until the current voltage of the first target phase shifter is within the preset voltage range; and for the second target phase shifter with the current voltage smaller than the second voltage, increasing the current voltage of the second target phase shifter by the regulating voltage until the current voltage of the second target phase shifter is within the preset voltage range.
7. The phased array laser terminal is characterized by comprising an optical module, an optical fiber beam splitter, M phase shifters, a controller, a beam splitting sampler and a spatial light detector; the optical module is used for emitting laser; the optical fiber beam splitter is used for dividing the laser into multiple paths of laser beams; The phase shifter is used for adjusting the phase of the laser beam based on the current voltage; The controller is used for selecting N target phase shifters with the current voltage being greater than a first voltage or with the current voltage being less than a second voltage from M phase shifters, wherein the first voltage is greater than the second voltage, M is a positive integer greater than or equal to N and greater than or equal to 2, and N is a positive integer greater than or equal to 1; determining a voltage regulation mode based on the current voltages of the M phase shifters, the first voltage and the second voltage when the current voltages of the target phase shifters meet preset conditions, regulating the current voltages of the phase shifters to be within a preset voltage range based on the voltage regulation mode and the regulated voltages, regulating the current voltages of the target phase shifters to be within the preset voltage range based on the regulated voltages when the current voltages of the target phase shifters do not meet the preset conditions, wherein the preset conditions are that the current voltages of the N target phase shifters are all larger than the first voltage or the current voltages of the N target phase shifters are all smaller than the second voltage; the beam splitting sampler is used for splitting the laser beam output by the phase shifter into two paths of laser beams; the space photodetector is used for determining the combined beam optical power.
8. The phased array laser termination of claim 7, wherein the controller is specifically configured to: Judging whether the current voltage of the M phase shifters is larger than a third voltage, wherein the third voltage is a sum of a first difference value and a preset fourth voltage, the first difference value is a difference value between the second voltage and the first voltage, and the fourth voltage is larger than the first voltage; And setting the voltage regulation mode as a first regulation mode under the condition that the current voltages of the M phase shifters are larger than the third voltage, otherwise setting the voltage regulation mode as a second regulation mode, wherein the first regulation mode is reducing regulation on the current voltages of the M phase shifters, and the second regulation mode is reducing regulation on the current voltages of the N target phase shifters.
9. The phased array laser termination of claim 8, wherein the controller is specifically configured to: When the voltage regulation mode is the first regulation mode, reducing the current voltages of the M phase shifters by the regulation voltage, and returning to the step of judging whether the current voltages of the M phase shifters are greater than a third voltage or not until the current voltages of the M phase shifters are all within the preset voltage range; And reducing the current voltages of the N target phase shifters by the adjusting voltage under the condition that the voltage adjusting mode is the second adjusting mode until the current voltages of the N target phase shifters are all in the preset voltage range.
10. The phased array laser termination of claim 7, wherein the controller is specifically configured to: Judging whether the current voltage of the M phase shifters is smaller than a fifth voltage, wherein the fifth voltage is a sum of a second difference value and a preset sixth voltage, the second difference value is a difference value between the first voltage and the second voltage, and the sixth voltage is smaller than the second voltage; And setting the voltage regulation mode as a third regulation mode under the condition that the current voltages of the M phase shifters are smaller than the fifth voltage, otherwise setting the voltage regulation mode as a fourth regulation mode, wherein the third regulation mode is to increase and regulate the current voltages of the M phase shifters, and the fourth regulation mode is to increase and regulate the current voltages of the N target phase shifters.
11. The phased array laser termination of claim 10, wherein the controller is specifically configured to: when the voltage regulation mode is the third regulation mode, increasing the current voltages of the M phase shifters by the regulation voltage, and returning to the step of judging whether the current voltages of the M phase shifters are smaller than a fifth voltage until the current voltages of the M phase shifters are all within the preset voltage range; And under the condition that the voltage regulation mode is the fourth regulation mode, increasing the current voltages of the N target phase shifters by the regulation voltage until the current voltages of the N target phase shifters are all within the preset voltage range.
12. The phased array laser termination of claim 7, wherein the controller is specifically configured to: Reducing the current voltage of the first target phase shifter by the regulating voltage aiming at the first target phase shifter with the current voltage larger than the first voltage until the current voltage of the first target phase shifter is within the preset voltage range; and for the second target phase shifter with the current voltage smaller than the second voltage, increasing the current voltage of the second target phase shifter by the regulating voltage until the current voltage of the second target phase shifter is within the preset voltage range.

Description

Phase control method and phased array laser terminal Technical Field The invention relates to the technical field of optical phased arrays, in particular to a phase control method and a phased array laser terminal. Background The phase control and synchronization of multiple laser beams are critical in the field of optical correlation, and the phase of the laser beams is generally changed by changing the applied voltage of a phase shifter, and the phase consistency of the multiple laser beams is realized by an iterative algorithm. However, in the process of controlling the phase of the laser beam by using the iterative algorithm, the phase shift amount of the phase shifter may reach a physical limit boundary due to randomness of the applied voltage variation of the phase shifter, resulting in interruption of the communication link. In the prior art, when the phase shift amount of the plurality of phase shifters reaches the physical limit boundary, the plurality of phase shifters are reset to the central phase shift position by simultaneously resetting the applied voltages of the plurality of phase shifters, but the phase consistency of the multipath laser beams is destroyed, so that the problems of obvious fluctuation and power reduction of the combined beam light power are caused. Disclosure of Invention The invention provides a phase control method and a phased array laser terminal, which are used for solving the problem that the phase consistency of multiple laser beams is damaged due to the fact that the applied voltages of multiple phase shifters are reset simultaneously in the prior art. In a first aspect, an embodiment of the present application provides a phase control method, including: Selecting N target phase shifters with the current voltage being greater than a first voltage or with the current voltage being less than a second voltage from M phase shifters, wherein the first voltage is greater than the second voltage, M is a positive integer greater than or equal to N and greater than or equal to 2, and N is a positive integer greater than or equal to 1; Determining a voltage regulation mode based on the current voltages of the M phase shifters, the first voltages and the second voltages when the current voltages of the target phase shifters meet preset conditions; adjusting the current voltage of the target phase shifter to be within the preset voltage range based on the adjustment voltage under the condition that the current voltage of the target phase shifter does not meet the preset condition; the preset condition is that the current voltages of the N target phase shifters are all larger than the first voltage, or the current voltages of the N target phase shifters are all smaller than the second voltage. In a possible implementation manner, the preset condition is that the current voltages of the N target phase shifters are all greater than the first voltage; The determining a voltage adjustment mode based on the current voltages of the M phase shifters, the first voltage, and the second voltage includes: Judging whether the current voltage of the M phase shifters is larger than a third voltage, wherein the third voltage is a sum of a first difference value and a preset fourth voltage, the first difference value is a difference value between the second voltage and the first voltage, and the fourth voltage is larger than the first voltage; And setting the voltage regulation mode as a first regulation mode under the condition that the current voltages of the M phase shifters are larger than the third voltage, otherwise setting the voltage regulation mode as a second regulation mode, wherein the first regulation mode is reducing regulation on the current voltages of the M phase shifters, and the second regulation mode is reducing regulation on the current voltages of the N target phase shifters. In one possible implementation manner, the adjusting the current voltage of the phase shifter to be within a preset voltage range based on the voltage adjustment manner and the adjustment voltage includes: When the voltage regulation mode is the first regulation mode, reducing the current voltages of the M phase shifters by the regulation voltage, and returning to the step of judging whether the current voltages of the M phase shifters are greater than a third voltage or not until the current voltages of the M phase shifters are all within the preset voltage range; And reducing the current voltages of the N target phase shifters by the adjusting voltage under the condition that the voltage adjusting mode is the second adjusting mode until the current voltages of the N target phase shifters are all in the preset voltage range. In a possible implementation manner, the preset condition is that the current voltages of the N target phase shifters are smaller than the second voltage; The determining a voltage adjustment mode based on the current voltages of the M phase shifters, the first voltage, and the s