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An optical module adjustment method with temperature compensation

An adjustment method and temperature compensation technology, applied in the field of optical communication, can solve the problems of optical power and temperature error of extinction ratio, and achieve the effect of accurate measurement and adjustment

Active Publication Date: 2022-07-19
成都明夷电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, on the basis of taking the two parameters that are difficult to control with the change of temperature as the weighing factors, the obtained values ​​of optical power and extinction ratio also have errors caused by temperature.

Method used

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  • An optical module adjustment method with temperature compensation
  • An optical module adjustment method with temperature compensation
  • An optical module adjustment method with temperature compensation

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Experimental program
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Effect test

Embodiment 1

[0035] This embodiment proposes an optical module adjustment method with temperature compensation, which is used to control the optical power and extinction ratio of the optical module, such as figure 1 shown, including the following steps:

[0036] Step 1: Use the three intrinsic parameters of the laser as a measurement factor to describe the relationship between the corresponding luminous average power P, extinction ratio ER, laser bias current I and laser modulation current M at different temperatures t; the three intrinsic parameters Including: the slope a of the laser luminous efficiency with temperature, the loss b of the overall optical path coupling of the laser and the original luminous efficiency of the laser c;

[0037] Step 2: Calculate and measure the specific laser luminous efficiency slope a of the laser in actual use as a function of temperature, the loss b of the overall optical path coupling of the laser, and the original luminous efficiency of the laser c; ...

Embodiment 2

[0041] This embodiment is based on the above-mentioned Embodiment 1, in order to better realize the present invention, further, the step 1:

[0042] (1) Taking the slope a of the luminous efficiency of the laser with temperature, the loss b of the overall optical path coupling of the laser and the original luminous efficiency of the laser c as the measuring factors, establish a relationship about the average luminous power P, the specific relationship is as follows:

[0043] ;

[0044] In the formula, P is the average luminous power, a is the slope of the laser luminous efficiency with temperature, b is the loss of the overall optical path coupling of the laser, c is the original luminous efficiency of the laser, I is the laser bias current, and t is the specific temperature corresponding to , M is the laser modulation current.

[0045] (2) Using the slope a of the luminous efficiency of the laser with temperature, the loss b of the overall optical path coupling of the lase...

Embodiment 3

[0056] This embodiment is based on any one of the above-mentioned embodiments 1-2, in order to better realize the present invention, further, the specific operation of the step 2 is:

[0057] Step 2.1: For the actual laser, select three different temperature points; the interval between the selected temperature points is greater than 3°C.

[0058] Step 2.3: Provide the laser with different laser bias currents I and do not provide the laser modulation current M when three different temperature points correspond;

[0059] Step 2.3: Measure the average luminous power P of the laser at three temperature points;

[0060] Step 2.4: According to the relationship described in Step 1, reversely obtain the slope a of the laser luminous efficiency of the laser as a function of temperature, the loss b of the overall optical path coupling of the laser, and the original luminous efficiency of the laser c.

[0061] The other parts of this embodiment are the same as any of the above-mentione...

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Abstract

The present invention proposes a method for adjusting an optical module with temperature compensation, which includes the following steps: Step 1: Using the three intrinsic parameters of the laser as measurement factors to describe the corresponding luminous average power P, extinction ratio ER, The relationship between the laser bias current I and the laser modulation current M; Step 2: Calculate and measure the specific laser luminous efficiency slope a of the actual laser in use as a function of temperature, the loss b of the overall optical path coupling of the laser, and the original luminous efficiency of the laser c ; Step 3: In the case of different temperature t, set the required target value of the required average luminous power P and extinction ratio ER, and then reversely derive the required laser bias current I and laser according to the set target value. The modulation current M enables precise control of the average luminous power P and the extinction ratio ER under different temperature changes.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an optical module adjustment method with temperature compensation. Background technique [0002] In the field of optical communication technology, the traditional expression of the optical power of a DFB laser is: P=(I-Ith)*SE, where P is the optical power, I is the bias current of the laser, Ith is the threshold current of the laser, SE is the luminous efficiency of the laser. Traditional algorithms for automatic optical power and extinction ratio are based on this expression. [0003] However, in practice, the above expression cannot accurately express the optical power of the transmitting end of the optical module. Because the value of the threshold current Ith at different temperatures is not linear, and the luminous efficiency SE is also a value that can vary with temperature. Therefore, on the basis of two parameters that are difficult to contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/06H01S5/062H01S5/0683H04B10/564G01M11/02
CPCH01S5/0612H01S5/062H01S5/0683H04B10/564G01M11/02
Inventor 蔡之骏李广生陶蕤李古健徐顶
Owner 成都明夷电子科技有限公司
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