CN102761052A - Optical module working parameter adjusting method and adjusting device - Google Patents

Optical module working parameter adjusting method and adjusting device Download PDF

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CN102761052A
CN102761052A CN 201210267384 CN201210267384A CN102761052A CN 102761052 A CN102761052 A CN 102761052A CN 201210267384 CN201210267384 CN 201210267384 CN 201210267384 A CN201210267384 A CN 201210267384A CN 102761052 A CN102761052 A CN 102761052A
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bias current
current
actual
ambient temperature
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CN 201210267384
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Chinese (zh)
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林青合
程磊
鲍晓东
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青岛海信宽带多媒体技术有限公司
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Abstract

The invention discloses an optical module working parameter adjusting method and an adjusting device. The method comprises the following steps of: detecting and obtaining an ambient temperature value; obtaining a reference bias current value and a reference modulated current value, which need to be compensated; when the ambient temperature value is more than a set temperature threshold value, obtaining an actual bias current compensated value and a modulated current compensated value by using a scaling factor which is not more than 1; when the ambient temperature value is not more than the set temperature threshold value, directly using the reference bias current value and the reference modulated current value as the actual bias current compensated value and the actual modulated current compensated value, respectively; and compensating a bias current and a modulated current of a laser according to the actual bias current compensated value and the actual modulated current compensated value. Through different adjustments carried out on working parameters under different conditions, a problem that the laser is degraded in performance and even damaged due to laser saturation can be solved.

Description

光模块工作参数调整方法及调整装置 Adjust the operating parameters of the optical module and method of adjusting means

技术领域 FIELD

[0001] 本发明涉及光通信技术领域,具体地说,是涉及光模块工作参数调整方法及调整 [0001] The present invention relates to the field of optical communications technology, particularly, to an optical module to adjust the operating parameter adjusting method and

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背景技术 Background technique

[0002] 光模块是用于光通讯领域设备中的一种标准模块,一般作为光路由器等设备的一种标准配件来使用。 [0002] The optical module is used for a standard module in the field of optical communications devices, typically as a standard accessory devices such as optical routers use. 近年来,随着用户对带宽的要求越来越高、光纤到户的普及等,光模块市场突飞猛进。 In recent years, with the increasing user requirements for higher bandwidth, popularization FTTH, rapid optical module market.

[0003] 光模块的核心器件之一是激光器,本质是一个激光二极管(LD—Laser diode)。 One [0003] The core module is a laser optical device, essentially a laser diode (LD-Laser diode). LD是一个电流器件,只有在它通过的正向电流超过其阈值电流Ith (Threshold current)时发出激光。 LD is a current of the device, as it only emits the laser threshold current Ith (Threshold current) in the forward current through it exceeds. 因此,为了使LD高速开关工作,必须对它加上略大于其阈值电流Ith的直流偏置电流Bias。 Thus, high-speed switching operation in order that the LD, it must be combined with its slightly greater than the threshold current Ith DC bias current Bias. LD的阈值电流Ith和斜效率S (Slope efficiency)这两个主要参数是温度的函数,且具有离散性。 The threshold current Ith, and the slope efficiency S (Slope efficiency) LD of the two main parameters are a function of temperature, and having discrete. 由光模块的工作性质所决定,当环境温度升高时,其阈值电流Ith增大,斜效率S降低。 Determined by the nature of the optical module, when the ambient temperature rises, the threshold current Ith increases, the slope efficiency S reduction.

[0004] 此外,光模块有两个比较重要的工作参数是与LD相关的,一个是消光比,另一个是平均光功率。 [0004] Further, the optical module has two more important operating parameter is related to the LD, a is the extinction ratio, the other is the average optical power. 为保证光模块正常工作,要求平均光功率和消光比保持不变。 To ensure that the optical module is working properly, it requires an average optical power and extinction ratio remains unchanged. 因此,当光模块工作在高温环境时,现有技术将根据环境温度与偏置电流的关系直接补偿给激光器一个所需的偏置电流,使得激光器在较大的偏置电流下工作;同时,根据偏置电流的变化等比例地改变激光器的调制电流,进而实现对光模块偏置电流和调制电流这两个驱动电流工作参数的调整。 Thus, when the bias current of the light module in a high temperature environment, according to the prior art the relationship between environmental temperature and bias current to the laser a direct compensation required, so that the laser operates at a larger bias current; the same time, the proportional change in the bias current varying modulation current of the laser, the optical module so as to realize the bias and modulation current driving current of two adjustment parameters.

[0005] 上述调整方法存在下述两个方面的缺点:其一,偏置电流及调制电流的不断增大会使得激光器工作在发光的非线性区域,光模块的发射光眼图质量会变差,且极容易导致激光器内部温度急剧升高,激光器达到饱和状态,造成其平均光功率和消光比等技术参数迅速变差,影响激光器的正常工作,甚至会损坏激光器;其二,等比例地改变偏置电流和调制电流理论上能够保持平均光功率和消光比不变,但在实际应用中并不能保持一致,从而降低了光模块的工作性能。 [0005] The method for adjusting two aspects of the following disadvantage: First, the bias current and modulation current is increasing so that the laser will operate in non-linear region of light emission, light emission eye deteriorated quality of the optical module, and very easily lead to a sharp increase in the internal temperature of the laser, the laser reaches saturation, resulting in the average optical power and extinction ratio and other technical parameters deteriorate rapidly, affecting the normal operation of the laser, and even damage to the laser; second, partial change proportionately set and modulation currents theoretically capable of maintaining the average optical power and extinction ratio constant, but is not consistent in practical applications, thereby reducing the performance of the optical module.

发明内容 SUMMARY

[0006] 本发明的目的之一是提供一种光模块工作参数调整方法,该方法根据不同条件对工作参数进行不同的调整,可以解决因激光器饱和而导致其性能下降、甚至损坏的问题。 One object of the [0006] present invention is to provide an optical module adjust the operating parameters, the method for adjustment of different operating parameters depending on the conditions, the laser can be solved by saturation cause it to deteriorate, or even damage problem.

[0007] 为实现上述发明目的,本发明提供的调整方法采用下述技术方案予以实现: [0007] In order to achieve the above object, the present invention provides a method of adjusting the program to be realized using the following techniques:

一种光模块工作参数调整方法,所述方法包括下述步骤: An optical module adjust the operating parameters, the method comprising the steps of:

a、检测并获取环境温度值,根据环境温度值查表获得需要补偿的基准偏置电流值和基准调制电流值; a, and obtains the ambient temperature detection value obtained look-up table needs to be compensated reference bias current value and the reference value a modulation current value according to the ambient temperature;

b、将环境温度值与设定温度门限值进行比较,在环境温度值大于设定温度门限值时,将基准偏置电流值与不大于I的第一比例因子相乘获得的值作为实际偏置电流补偿值、将、基准调制电流值与不大于I的第二比例因子相乘获得的值作为实际调制电流补偿值,在环境温度值不大于设定温度门限值时,将基准偏置电流值作为实际偏置电流补偿值、将基准调制电流值作为实际调制电流补偿值; B, the ambient temperature value is compared with the set temperature threshold value, at ambient temperature greater than a set temperature threshold value, the reference value of the bias current value I is not greater than the first scale factor obtained by multiplying a when the actual value of the bias current compensation value, the reference value and the modulation current I is not greater than a second scale factor obtained by multiplying the compensation value as an actual modulation current, at ambient temperature, the set temperature is not greater than the threshold, the reference bias current value as the actual value of the bias current compensation, the modulation current reference value as the actual modulation current compensation value;

C、根据实际偏置电流补偿值和实际调制电流补偿值对激光器的偏置电流和调制电流进行补偿,以调整激光器的偏置电流参数和调制电流参数。 C, the actual bias current compensation value and the actual modulation current compensation value to compensate for the bias current and modulation current of the laser, to adjust the bias current and modulation current parameters of the laser parameters.

[0008] 如上所述的调整方法,为确保激光器平均光功率和消光比的一致性,所述第一比例因子大于所述第二比例因子。 [0008] The adjustment method described above, to ensure consistency laser average optical power and extinction ratio, the first scaling factor is greater than the second scaling factor.

[0009] 如上所述的调整方法,所述第一比例因子与所述第二比例因子之差为O. 02-0. 04。 [0009] The adjustment method described above, the difference between the first scale factor and the second scaling factor is O. 02-0. 04.

[0010] 优选的,所述第一比例因子与所述第二比例因子之差为O. 03。 [0010] Preferably, the first scaling factor and the difference between the second scale factor is O. 03.

[0011] 如上所述的调整方法,为进一步保护激光器、使其工作在正常状态下,在所述步骤c之后还包括下述步骤: [0011] The adjustment method described above, further protect the laser to operate in a normal state, after said step c further comprises the steps of:

d、实时检测并获取激光器的偏置电流值,将获取的偏置电流值与设定偏置电流上限值及设定偏置电流下限值进行比较,在所述环境温度值大于设定温度门限值、且偏置电流值大于设定偏置电流上限值时,控制所述第一比例因子和所述第二比例因子递减,在所述环境温度值大于设定温度门限值且偏置电流值小于设定偏置电流下限值时,控制所述第一比例因子和所述第二比例因子递增,并用递增或递减后的相应比例因子获取实际偏置电流补偿值和实际调制电流补偿值。 d, and to obtain real-time detection of the laser bias current value, and setting the bias current value of the bias current value and the acquired setting the bias current value is compared, at said ambient temperature value is greater than the set threshold temperature, and the set upper limit value is greater than the bias current of the bias current value, the first scale factor and controls said second scale factor is decremented, the ambient temperature is greater than the set threshold temperature when the bias current value and the bias current of less than the set value, the first scale factor and controlling said second scale factor increment, and acquires the actual value and the bias current compensation scale factor with the corresponding actual increment or decrement the modulation current compensation value.

[0012] 如上所述的调整方法,所述设定温度门限值优选为60°,所述设定偏置电流上限值优选为7. 5mA,所述设定偏置电流下限值优选为7. 2mA。 [0012] The adjustment method described above, the threshold setting temperature is preferably 60 °, the bias current setting upper limit is preferably 7. 5mA, the bias current is preferably set lower limit value to 7. 2mA.

[0013] 本发明的目的之二是提供一种光模块工作参数调整装置,利用该装置可以有效解决因激光器饱和而导致其性能下降甚至损坏的问题,提高了光模块参数调整的准确性和可靠性。 [0013] Second object of the present invention is to provide an optical module operating parameter adjusting means with which the device can effectively solve the problems caused by the laser saturation cause it to deteriorate or even damage, to improve the accuracy of the optical module and reliable parameter adjustment sex.

[0014] 为实现上述发明目的,本发明提供的调整装置采用下述技术方案来实现: [0014] In order to achieve the above object, the present invention provides an adjustment device adopts a technical solution to achieve:

一种光模块工作参数调整装置,所述装置包括: An optical module is operating parameter adjustment device, said apparatus comprising:

温度检测与获取单元,用于检测并获取环境温度值; And obtaining a temperature detection unit for detecting an ambient temperature value and acquiring;

基准电流获取单元,用于根据环境温度值查表,获得需要补偿的基准偏置电流值和基准调制电流值; Reference bias current value and the reference value of the reference current modulation current acquisition unit for look-up table according to the value of the ambient temperature, to obtain compensation is required;

温度比较单元,用于比较环境温度值与设定温度门限值,并输出比较结果; Temperature comparison means for comparing the ambient temperature and the set temperature threshold value, and outputting a comparison result;

比例因子生成单元,用于产生偏置电流用第一比例因子及调制电流用第二比例因子,第一比例因子与第二比例因子均不大于I; Scale factor generating means for generating a first bias current and modulation current scale factor by a second scaling factor, the first scaling factor and the second scaling factor not greater than I;

实际电流计算单元,用于根据基准电流获取单元、温度比较单元及比例因子生成单元的结果计算实际偏置电流补偿值及实际调制电流补偿值; Actual current calculating unit configured to obtain a current cell based on the reference, and the result of the temperature comparing unit generating a scale factor means calculates an actual compensation value and the bias current actual modulation current compensation value;

电流补偿及控制单元,用于根据实际电流计算单元输出的实际电流值对激光器进行偏置电流补偿及调制电流补偿,并对调制装置各单元进行统一控制。 Current compensation and a control unit for compensating the laser bias current and modulation current compensation according to the actual current value actually output from the current calculation unit, and means for modulating each of the unified control unit.

[0015] 如上所述的调制装置,为进一步保证激光器在正常工作状态下工作,所述装置还包括: [0015] The modulation device as described above, to further ensure that the laser is operated in a normal operating state, said apparatus further comprising:

偏置电流检测与获取单元,用于检测并获取激光器工作时的偏置电流值; And obtaining the bias current detecting means for detecting and acquiring the bias current value when the laser is operating;

偏置电流比较单元,用于将偏置电流检测与获取单元获取的偏置电流值与设定偏置电流下限值与设定偏置电流上限值进行比较,并输出比较结果;以及比例因子调整单元,用于根据偏置电流比较单元的输出结果对所述比例因子生成单元所生成的第一比例因子和第二比例因子进行调整。 Bias current comparing unit, an upper limit value and the lower limit of the bias current set value of the bias current and the bias current setting acquiring unit for acquiring the detected bias current is compared and outputting a comparison result; and a ratio factor adjusting means for adjusting the bias current in accordance with the output result of the comparing unit a first scale factor for the scale factor generating unit and the generated second scaling factor.

[0016] 如上所述的调制装置,为确保激光器平均光功率和消光比的一致性,所述第一比例因子大于所述第二比例因子。 [0016] The modulation device as described above, to ensure consistency laser average optical power and extinction ratio, the first scaling factor is greater than the second scaling factor.

[0017] 与现有技术相比,本发明的优点和积极效果是:本发明根据环境温度的不同采用不同的调整方法调整光模块的工作参数,保证激光器在高温环境下仍能够正常工作,有效避免了激光器由于温度过高、驱动电流过大造成的性能下降及使用寿命降低的问题,既保证了光模块的质量,又降低了光模块的功耗,且增大了光模块的工作温区,提高了其性能。 [0017] Compared with the prior art, the advantages and positive effects of the invention are: the present invention uses an optical module to adjust the operating parameters of the different adjustment methods according to different ambient temperatures, to ensure that the laser is still able to work in a high temperature environment, effective to avoid performance degradation and reduce the life of a problem because the temperature is too high the laser drive current caused by too much, both to ensure the quality of the optical module, but also reduce the power consumption of the optical module, and increase the working temperature of the optical module to improve its performance.

[0018] 结合附图阅读本发明的具体实施方式后,本发明的其他特点和优点将变得更加清 [0018] The present invention is read in conjunction with the specific embodiments of the drawings Other features and advantages of the invention will become clear

λ·Μ λ · Μ

/E. ο / E. Ο

附图说明 BRIEF DESCRIPTION

[0019] 图I是本发明光模块工作参数调整装置一个实施例的结构示意图; [0019] Figure I is a block diagram of one embodiment of the present invention, the optical module operating parameter adjustment device;

图2是本发明光模块工作参数调整方法一个实施例的流程图。 FIG 2 is a flowchart of a method to adjust the operating parameters of the optical module of the present invention, an embodiment.

具体实施方式 detailed description

[0020] 下面结合附图和具体实施方式对本发明的技术方案作进一步详细的说明。 [0020] Next, the technical solution of the present invention will be described in further detail in conjunction with accompanying drawings and specific embodiments.

[0021] 首先,简要说明本发明的设计思想:由于光模块工作温度升高时,其激光器发出相同功率的光所需要的驱动电流越大,容易导致光模块发射指标恶化的问题。 [0021] First, a brief description of the design concept of the invention: due to the optical module temperature rise, the larger the driving current which laser emits light of the same power required easily lead to problems indicator light emitting module is deteriorated. 基于此,本发明从驱动电流角度出发,在光模块高温工作时,采用一定措施降低其偏置电流和调制电流,以保证光模块正常工作。 Based on this, the present invention from the viewpoint of the driving current, at high temperature of the optical module, the use of certain measures to reduce its bias current and modulation current, in order to ensure normal operation of the optical module.

[0022] 请参考图1,该图I示出了本发明光模块工作参数调整装置一个实施例的结构示意图。 [0022] Please refer to FIG. 1, FIG I shows the operating parameters of the optical module of the present invention means adjusting a schematic structural diagram of the embodiment.

[0023] 如图I所示,该实施例的调整装置所包含的单元部分、各部分的连接关系及功能如下: [0023] FIG I, the unit part of the adjustment device according to this embodiment contains, connection relationship and function of each part are as follows:

温度检测与获取单元101,用于检测并获取环境温度值,可以采用温度传感器来实现。 And obtaining temperature detection unit 101 for detecting and acquiring ambient temperature, a temperature sensor may be employed to achieve.

[0024] 偏置电流检测与获取单元102,用来检测并获取激光器工作时的偏置电流值,可以采用专用电流获取芯片或搭建电流采集电路来实现。 [0024] The bias current detection and acquisition unit 102 for detecting when the bias current value and obtain laser operation, the current can be acquired using a dedicated chip or build the current pickup circuits.

[0025] 基准电流获取单元106,与温度检测与获取单元101及偏置电流检测与获取单元102相连接,读取温度检测与获取单元101输出的环境温度值及偏置电流检测与获取单元102输出的偏置电流值,并根据这两个值获得需要对激光器进行补偿的基准偏置电流值和基准调制电流值。 [0025] The reference current acquisition unit 106, the temperature detection and acquisition unit 101 and a bias current detecting and obtaining unit 102 is connected to the temperature detecting and reading acquisition unit 101 outputs the bias current value and the ambient temperature detecting unit 102 and the acquisition a bias current output value, and to obtain the desired laser to compensate these two values ​​of the bias current value and the reference modulation current reference value. 现有技术中,对于每一类型的光模块,均配置有一个温度值与驱动电流相对应的表,因此,可以通过查表的方式获得某一环境温度下所需要补偿的偏置电流值和调制电流值,然后,将所查得值作为基准值备用。 Bias current value and the compensation required in the prior art, for each type of optical modules are equipped with a temperature value of the drive current corresponding to the table, therefore, can be obtained by a table lookup ambient temperature under modulation current value, then the value obtained as the reference value to check the spare.

[0026] 温度比较单元103,和温度检测与获取单元101相连接,用于读取温度检测与获取单元101所获取的环境温度值,并将该值与设定温度门限值进行比较,然后输出比较结果。 103, and a temperature detecting [0026] the temperature comparing unit is connected to the acquisition unit 101 for reading the temperature detecting unit 101 acquires the ambient temperature value acquired, and the threshold value and the set temperature are compared, and the output of the comparison result.

[0027] 偏置电流比较单元104,和偏置电流检测与获取单元102相连接,用于读取偏置电流检测与获取单元102所获取的偏置电流值,并将该值与设定偏置电流上限值及下限值进行比较,然后输出比较结果。 [0027] The bias current comparing unit 104, and the bias current detecting acquisition unit 102 is connected, to read the bias current detecting unit 102 acquires the bias current value obtained, and the bias value and the set limit value and the lower limit value set on the comparison current, and then outputs a comparison result. [0028] 比例因子生成单元105,用来产生调整偏置电流补偿值的第一比例因子和调整调制电流补偿值的第二比例因子,其中,这两个比例因子均不大于I。 [0028] The scaling factor generation unit 105 for generating a second scaling factor and the first scale factor to adjust the modulation current compensation value compensation value to adjust the bias current, wherein the two scale factors are not greater than I.

[0029] 比例因子调整单元108,与偏置电流比较单元104和比例因子生成单元105相连接,用于根据偏置电流比较单元104的输出结果对比例因子生成单元105所生成的第一比例因子和第二比例因子进行调整,并输出调整结果。 [0029] The scale factor adjustment means 108, 105 is connected to the bias current comparing unit 104 and a scale factor generating unit, a first scaling factor based on an output result of the comparing unit 104 of the bias current generating unit 105 of the generated scale factors and adjusting the second scaling factor, and outputs the adjustment result. 更具体的调整方法和过程可以参考图2方法实施例及下述对图2的描述。 More specifically, the methods and processes can be adjusted with reference to FIG. 2 and Example 2 in the following description of the embodiment of FIG.

[0030] 实际电流计算单元107,与基准电流获取单元106、温度比较单元103及比例因子调整单元108相连接,根据这三个单元所输出的结果计算实现偏置电流补偿值及实际调制电流补偿值并输出。 [0030] The actual current calculation unit 107, the reference current acquisition unit 106, a temperature comparing unit 103 and the scaling factor adjustment unit 108 is connected to the bias current compensation value is calculated to achieve the actual modulation current and the compensation unit according to a result outputted from these three value and output. 更具体的计算方法及过程可以参考图2方法实施例及下述对图2的描述。 More specifically, methods and processes can be calculated with reference to FIG. 2 and Example 2 in the following description of the embodiment of FIG.

[0031] 电流补偿及控制单元109,一方面与实际电流计算单元107相连接,读取其所输出的实际电流补偿值对激光器进行偏置电流补偿和调制电流补偿,完成对激光器偏置电流参数和调制电流参数的调整,另一方面又作为调整装置的控制核心,与装置中的上述各单元分别连接,以对各单元进行统一控制,协调各单元部分工作,最终实现光模块工作参数的调 [0031] The current compensation and the control unit 109, 107 is connected on the one hand and the actual current calculating unit, reads the actual output current compensation value for compensating the laser bias current and modulation current compensation, to complete the laser bias current parameters and adjusting the modulation current parameters, on the other hand as the control center of the adjustment means, means connected to each of the units, respectively, to perform overall control of each unit, to coordinate the work unit portion, adjusting the operating parameters of the optical module ultimately

difficult

iF. O iF. O

[0032] 该实施例的调整装置更具体的工作过程可以参考图2方法实施例及下述对图2的描述。 [0032] The adjusting device according to an embodiment of the working process may be more specifically with reference to Figure 2 and following the method described in Example 2 of the embodiment of FIG.

[0033] 上述实施例作为一个优选实施例,设置了偏置电流检测与获取单元102、偏置电流比较单元104及比例因子调整单元108,从而能够根据偏置电流与设定门限值的不同动态对比例因子生成单元105所生成的两个比例因子进行调节,以实现光模块工作参数的动态调整。 [0033] As a preferred embodiment of the above-described embodiment, the bias current is provided to detect acquisition unit 102, comparing unit 104, and the bias current scaling factor adjustment unit 108, can be different from the bias current with a threshold value set in accordance with dynamic scaling factor of two scale factors generated by the generation unit 105 is adjusted to achieve a dynamic adjustment of the operating parameters of the optical module. 但并不局限于这个优选结构,如果对光模块性能及调整要求不是很高的应用场合,也可以不设置这几个单元,而直接采用比例因子生成单元105生成的固定比例因子对光模块工作参数进行调节,从而简化装置结构和调整过程。 But is not limited to this preferred configuration, if the optical module is not very high performance requirements and adjustment applications, also these means may not be provided, directly fixed scale factor optical modules work scale factor generating unit 105 generates a parameter adjustment, thereby simplifying the device structure and the adjustment process. 具体采用哪种结构的调整装置,可以根据实际应用环境及用户需求合理选择。 Adjusting device which uses a specific structure may be selected in accordance with a reasonable application environment and user requirements.

[0034] 请参考图2,该图2所示为本发明光模块工作参数调整方法一个实施例的流程图,该方法基于图I实施例的调整装置,可以应用在图I的调整装置中。 [0034] Please refer to FIG. 2, which the present invention is an optical module flowchart of a method of adjusting operating parameters of the embodiment shown in FIG. 2 embodiment, the method based on the adjustment apparatus embodiment of Figure I embodiment, the adjustment means may be applied in I in FIG.

[0035] 如图2所示,该实施例对光模块工作参数、即激光器的偏置电流和调制电流这两个驱动电流参数调整的过程如下: [0035] As shown in FIG. 2, this embodiment of the optical module operating parameters embodiment, i.e., the laser bias and modulation currents of these two parameters to adjust the driving current is as follows:

步骤201 :流程开始。 Step 201: Process starts.

[0036] 步骤202 :检测并获取环境温度值和偏置电流值。 [0036] Step 202: detecting and acquiring ambient temperature and bias current value.

[0037] 其中,环境温度值是光模块所处工作环境的温度,偏置电流值是光模块未进行调整的当前状态下的激光器偏置电流值。 [0037] wherein the value of the ambient temperature environment in which the optical module is the temperature, bias current value is the value of laser bias current in the current state of the optical module is not adjusted. 可以通过设置在光模块上的温度传感器检测环境温度值,通过设置在光模块内部的电流采样电路采集或通过监控单元直接获取偏置电流值。 It can be detected by the temperature sensor disposed in the ambient temperature of the optical module, by the current sampling circuit disposed inside the light collecting module or the bias current value acquired by the monitoring unit directly.

[0038] 步骤203 :获取需要补偿的基准偏置电流值和基准调制电流值。 [0038] Step 203: obtaining a need to compensate the reference value and the bias current a modulation current reference value.

[0039] 具体来说,现有技术中,对于每一类型的光模块,均配置有一个温度值与驱动电流相对应的表,因此,可以通过查表的方式获得某一环境温度下所需要补偿的偏置电流值和调制电流值,然后,将所查得值作为基准值备用。 [0039] Specifically, the prior art, for each type of optical modules are equipped with a temperature value of the drive current corresponding to the table, therefore, at a certain ambient temperature can be obtained by table lookup required bias current value and the compensated modulation current value, then the value obtained as the reference value to check the spare.

[0040] 步骤204 :判断环境温度值是否大于设定温度门限值。 [0040] Step 204: determining whether the ambient temperature is greater than a set value of the temperature threshold. 若是,转至步骤206 ;若否,执行步骤205。 If yes, go to step 206; if not, step 205 is executed. [0041] 该实施例中,设定温度门限值与光模块的性能指标及使用需求有关,优选的,将门限值设定为60°C。 [0041] In this embodiment, the set temperature threshold value and performance of the optical module and related needs, preferably, the threshold value is set to 60 ° C.

[0042] 步骤205 :如果环境温度值不大于设定温度门限值,表明光模块不需要进行保护性的补偿调整,可以直接对其参数进行规定的调整。 [0042] Step 205: If the ambient temperature is not greater than a set temperature threshold value, indicating that the optical module need not be adjusted to compensate protective, can be adjusted directly to its predetermined parameters. 因此,以查表获得的基准偏置电流值和基准调制电流值作为实际的偏置电流补偿值和实际的调制电流补偿值即可。 Thus, the reference look-up table to obtain the bias current value and the reference value as the actual modulation current bias current compensation value and the actual modulation current compensation value. 然后,执行步骤212。 Then, step 212 is performed.

[0043] 步骤206,如果环境温度值大于设定温度门限值,为防止光模块发射性能指标劣化,将采用保护性参数补偿调整过程,首先生成两个不大于I的比例因子,即第一比例因子和第二比例因子,分别作为对偏置电流和调制电流进行控制的比例因子。 [0043] Step 206, if the ambient temperature is greater than the set threshold temperature, in order to prevent deterioration of the emission performance of the optical module, the use of protective compensation parameter adjustment process, first generates two scale factor is not greater than I, a first a second scale factor and scale factors, respectively, as a scale factor for controlling the bias and modulation currents.

[0044] 在该实施例中,作为优选方式,第一比例因子大于第二比例因子,且两者之差为 [0044] In this embodiment, as a preferred embodiment, the first scaling factor is greater than the second scaling factor, and the difference between them is

O. 02-0. 04,优选为O. 03,也即对偏置电流的调整比例大于对调整电流的调整比例,这样能够确保光模块发射指标的稳定性和一致性。 O. 02-0. 04, preferably O. 03, i.e. to adjust the ratio of the bias current is greater than the ratio of the modulation current adjustment, this can ensure the stability and consistency of the light-emitting module indicators.

[0045] 步骤207 :判断偏置电流值是否大于设定电流上限值。 [0045] Step 207: determining whether the bias current value is greater than the set upper limit current. 若是,执行步骤208 ;若否,转至步骤211。 If so, step 208 is performed; if not, go to step 211.

[0046] 为进一步保护激光器、使其工作在正常状态下,作为优选实施方式,该实施例的保护性判断条件不仅包括温度的判断,还包括偏置电流的判断,具体来说,在环境温度大于设定温度门限值之后,再判断偏置电流值与设定电流上限值及下限值的关系,并根据判断结果控制比例因子。 [0046] To further protect the laser to operate in a normal state, as a preferred embodiment, the protective determination condition of this embodiment includes not only the determination of the temperature, further comprising determining the bias current, particularly at ambient temperature after the set temperature is greater than the threshold, then determining the bias current value with a set current limit and the lower limit of the relationship, and controlling the scaling factor based on the determination.

[0047] 步骤208 :在偏置电流值大于设定电流上限值时,控制第一比例因子和第二比例因子递减。 [0047] Step 208: When the current upper limit value is larger than the bias current is set, the control of the first scale factor and second scaling factor is decremented.

[0048] 递减程度可以根据控制需要及计算速度合理选择。 [0048] decreasing the degree of control required can be selected according to the reasonable and calculation speed. 例如,比例因子可以采用k/128的表示形式,其中,k为不大于128的二进制,则可以采用k每次减I的方式进行递减。 For example, the scaling factor k may take the form of representation / 128, where, k is not more than 128 binary, may be employed per method I k Save decremented. 递减过程直至偏置电流值下降到设定电流下限值或者第一比例因子变为O时结束。 Until the bias current value is decremented down to the end of the process when the limit value or the first scale factor becomes O at a set current.

[0049] 步骤209 :判断偏置电流值是否小于设定电流下限值。 [0049] Step 209: determining the bias current value is smaller than the lower limit value of the set current. 若是,执行步骤209 ;若否,转至步骤211。 If so, step 209 is executed; if not, go to step 211.

[0050] 在利用小于I的比例因子调整偏置电流补偿值及调制电流补偿值作为实际补偿值补偿给激光器后,激光器的平均光功率会在允许的范围内下降。 [0050] I use a scale factor less than adjusting the bias current and modulation current compensation value as the compensation value after the actual compensation value to the laser, the average optical power of the laser will drop within the allowable range. 在比例因子递减过程中,可能会因为比例因子递减幅度过大而使得实际偏置电流补偿值过小,进而导致激光器的偏置电流值降低到设定电流下限值。 In the process of decreasing the scale factor, the scale factor may be down because of too large so that the actual magnitude of the bias current compensation value is too small, leading to the laser bias current value is lowered to lower the set current limit. 如果偏置电流值过小,会使得激光器的发射指标降到允许的范围一下,影响光模块的发射指标。 If the bias current value is too small, so that the laser emitting indicators look down the permissible range, the influence of light emitting indicator module. 为避免这种过度下降,该实施例随时判断偏置电流值与设定电流下限值的大小,并根据判断结果采用不同的处理方法。 To avoid such an excessive drop, this embodiment always determines the lower size limit of the bias current and a set current value, and uses a different approach based on the result.

[0051] 而且,在该实施例中,考虑到常用光模块的激光器性能指标及实际应用需求,设定偏置电流上限值优选为7. 5mA,而设定偏置电流下限值优选为7. 2mA。 [0051] Further, in this embodiment, in consideration of the conventional laser optical module performance and practical applications, the upper limit of the bias current is set preferably 7. 5mA, a bias current set lower limit is preferably 7. 2mA.

[0052] 步骤210 :在偏置电流值小于设定电流下限值时,控制第一比例因子和第二比例因子递增,以增加补偿电流值。 [0052] Step 210: when the value is less than the set current value of the bias current, the control of the first scale factor and the second scaling factor is incremented to increase the offset current value.

[0053] 同样的,递增程度可以根据控制需要及计算速度合理选择。 [0053] Similarly, incrementing the degree of control required can be selected according to the reasonable and calculation speed. 例如,比例因子可以采用k/128的表示形式,其中,k为不大于128的二进制,则可以采用k每次加I的方式进行递增。 For example, the scaling factor k may take the form of representation / 128, where, k is not more than 128 binary, plus the I k each incremental manner may be employed. 递增过程直至偏置电流值上升到设定电流上限值或者第一比例因子变为I时结束。 Bias current value is incremented until the end of the process is increased when the limit value or the first scale factor I becomes the set current.

[0054] 步骤211 :利用第一、第二比例因子获取实际偏置电流补偿值和实际调值电流补偿值。 [0054] Step 211: using the first, second scaling factor to obtain the actual bias current compensation value and the actual value of the modulation current compensation value. 然后,执行步骤212。 Then, step 212 is performed.

[0055] 具体来说,是将步骤203获得的基准偏置电流值与第一比例因子相乘获得的值作为实际偏置电流补偿值,而将步骤203获得的基准调制电流值与第二比例因子相乘获得的值作为实际调制电流补偿值。 [0055] Specifically, the reference value is the bias current value obtained in step 203 with the first scale factor obtained by multiplying the actual value of the bias current compensation, the modulation current reference value obtained in step 203 and the second ratio factor as the actual value obtained by multiplying the modulation current compensation value.

步骤212:根据实际补偿值调整偏置电流参数和调制电流参数,也即用实际偏置电流补偿值和实际调制电流补偿值对激光器的偏置电流和调制电流进行补偿,从而实现对光模块的工作参数的调整。 Step 212: adjusting the actual value of the bias current compensation parameters and modulation current parameters, i.e. to compensate for the bias current and modulation current of the laser bias current with the actual compensation value and the actual modulation current compensation value, thereby realizing the optical module adjust operating parameters.

[0056] 在光模块工作参数调制过程中,将随时检测环境温度,一旦环境温度值不大于设定温度门限值,则执行步骤205和步骤212的非保护性调整,而若环境温度值大于设定温度门限值,则执行步骤206至步骤212的保护性调整。 [0056] In the optical module operating parameters of the modulation process, the detected ambient temperature at any time, once the ambient temperature is not greater than the set threshold value, steps 205 and 212 unprotected adjustment is performed, and if the value is greater than the ambient temperature set temperature threshold, step 206 to step 212 to adjust the protection is performed. · ·

[0057] 该实施例根据环境温度的不同采用不同的调整过程调整光模块的工作参数,能够保证激光器在高温环境下仍能够正常工作,有效避免了激光器由于温度过高、驱动电流过大造成的性能下降及使用寿命降低的问题,既保证了光模块的质量,又降低了光模块的功耗,且增大了光模块的工作温区,提高了其性能。 [0057] This embodiment of the adjustment according to different processes with different operating parameters of the optical module to adjust the ambient temperature, to ensure that the laser is still able to work at high temperatures, to effectively prevent the laser due to the temperature is too high, the driving current caused by excessive performance degradation and reduce the life of the issue, both to ensure the quality of the optical module, but also reduce the power consumption of the optical module, and increase the working temperature of the optical module, to improve its performance.

[0058] 此外,还需要说明的是,如果对光模块性能及调整要求不是很高的应用场合,也可以不对偏置电流进行判断,而在环境温度大于设定温度门限值时,直接采用固定的第一比例因子和第二比例因子对光模块的偏置电流补偿值和调制电流补偿值进行调整,进而调整相应的工作参数,这样可以简化调整方法和调整速度。 [0058] In addition, also be noted that, if the optical module is not very high performance requirements and adjustment applications, the bias current may not be determined, and at ambient temperature for greater than a set temperature threshold value, directly using fixed ratio of first and second optical scale factor compensation value and the bias current value of the modulation current compensation factor module is adjusted, thereby adjusting the corresponding operating parameters, and adjustment methods can be simplified so that the speed of adjustment. 具体采用哪种方法,可以根据实际应用环境及用户需求合理选择。 Which approach to use, reasonably choose according to the actual application environment and user needs.

[0059] 以上实施例仅用以说明本发明的技术方案,而非对其进行限制;尽管参照前述实施例对本发明进行了详细的说明,对于本领域的普通技术人员来说,依然可以对前述实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或替换,并不使相应技术方案的本质脱离本发明所要求保护的技术方案的精神和范围。 [0059] The above embodiments are intended to illustrate the present invention, but not intended to be limiting;. Although the present invention has been described in detail embodiments, those of ordinary skill in the art, the foregoing can still the technical solutions described in the embodiments may be modified, or some technical features equivalents; as such modifications or replacements do not cause the essence of corresponding technical solutions to depart from the spirit and scope of the invention as claimed technical solution.

Claims (10)

  1. 1. 一种光模块工作参数调整方法,其特征在于,所述方法包括下述步骤: a、检测并获取环境温度值,根据环境温度值查表获得需要补偿的基准偏置电流值和基准调制电流值; b、将环境温度值与设定温度门限值进行比较,在环境温度值大于设定温度门限值时,将基准偏置电流值与不大于I的第一比例因子相乘获得的值作为实际偏置电流补偿值、将基准调制电流值与不大于I的第二比例因子相乘获得的值作为实际调制电流补偿值,在环境温度值不大于设定温度门限值时,将基准偏置电流值作为实际偏置电流补偿值、将基准调制电流值作为实际调制电流补偿值; C、根据实际偏置电流补偿值和实际调制电流补偿值对激光器的偏置电流和调制电流进行补偿,以调整激光器的偏置电流参数和调制电流参数。 An optical module adjust the operating parameters, characterized in that, said method comprising the steps of: a, and obtains the ambient temperature detection value obtained look-up table needs to be compensated reference bias current value and the reference value is modulated in accordance with the ambient temperature current value; B, the ambient temperature and the set temperature threshold value is compared, at ambient temperature greater than the set temperature threshold value, the reference value is not greater than the bias current I is obtained by multiplying the first scaling factor the actual value of the bias current value as the compensation value, the reference value and the modulation current I is not greater than a second scale factor obtained by multiplying the compensation value as an actual modulation current, at ambient temperature, the set temperature is not greater than the threshold value, the reference bias current value as the actual value of the bias current compensation, the modulation current reference value as the actual modulation current compensation value; C, the bias and modulation currents of the laser bias current based on the actual compensation value and the actual modulation current compensation value compensating parameters to adjust the bias current and modulation current parameters of the laser.
  2. 2.根据权利要求I所述的调整方法,其特征在于,所述第一比例因子大于所述第二比例因子。 The adjustment method according to claim I, wherein the first scaling factor is larger than said second scaling factor.
  3. 3.根据权利要求2所述的调整方法,其特征在于,所述第一比例因子与所述第二比例因子之差为O. 02-0. 04。 The adjustment method according to claim 2, wherein the first scaling factor and the difference between the second scale factor is O. 02-0. 04.
  4. 4.根据权利要求3所述的调整方法,其特征在于,所述第一比例因子与所述第二比例因子之差为O. 03。 The adjustment method according to claim 3, characterized in that the difference between the first scale factor and the second scaling factor is O. 03.
  5. 5.根据权利要求I至4中任一项所述的调整方法,其特征在于,在所述步骤c之后还包括下述步骤: d、实时检测并获取激光器的偏置电流值,将获取的偏置电流值与设定偏置电流上限值及设定偏置电流下限值进行比较,在所述环境温度值大于设定温度门限值、且偏置电流值大于设定偏置电流上限值时,控制所述第一比例因子和所述第二比例因子递减,在所述环境温度值大于设定温度门限值且偏置电流值小于设定偏置电流下限值时,控制所述第一比例因子和所述第二比例因子递增,并用递增或递减后的相应比例因子获取实际偏置电流补偿值和实际调制电流补偿值。 The adjusting method as claimed in any one of claims I to 4, wherein, after said step c further comprises the step of: d, and obtain real-time detection of the laser bias current value, the acquired setting the bias current value and the bias current is set lower limit value and the bias current value is compared, at said ambient temperature value is greater than a set temperature threshold value, and the bias current value is set larger than the bias current upper limit value, controlling the first scale factor and the second scaling factor decremented value is greater than the ambient temperature and the set temperature threshold bias current value is less than the lower limit value is set a bias current, controlling the first scale factor and the second scaling factor increment, and acquires the actual bias current compensation value and the actual modulation current compensation value corresponding to the scale factor after the increment or decrement.
  6. 6.根据权利要求5所述的调整方法,其特征在于,所述设定温度门限值为60°。 6. The adjusting method as claimed in claim 5, wherein said set temperature threshold is 60 °.
  7. 7.根据权利要求5所述的调整方法,其特征在于,所述设定偏置电流上限值为7. 5mA,所述设定偏置电流下限值为7. 2mA。 7. The method of adjustment according to claim 5, wherein said bias current upper limit value setting 7. 5mA, the lower limit value of the bias current setting 7. 2mA.
  8. 8. 一种光模块工作参数调整装置,其特征在于,所述装置包括: 温度检测与获取单元,用于检测并获取环境温度值; 基准电流获取单元,用于根据环境温度值查表,获得需要补偿的基准偏置电流值和基准调制电流值; 温度比较单元,用于比较环境温度值与设定温度门限值,并输出比较结果; 比例因子生成单元,用于产生偏置电流用第一比例因子及调制电流用第二比例因子,第一比例因子与第二比例因子均不大于I ; 实际电流计算单元,用于根据基准电流获取单元、温度比较单元及比例因子生成单元的结果计算实际偏置电流补偿值及实际调制电流补偿值; 电流补偿及控制单元,用于根据实际电流计算单元输出的实际电流值对激光器进行偏置电流补偿及调制电流补偿,并对调制装置各单元进行统一控制。 An optical module is operating parameter adjustment device, characterized in that, said means comprising: a temperature detection and acquisition unit for acquiring and detecting an ambient temperature value; reference current acquisition unit for look-up table according to the ambient temperature value to obtain be compensated reference bias current value and the reference value a modulation current; temperature comparison means for comparing the ambient temperature and the set temperature threshold value, and outputting a comparison result; scale factor generating means for generating a bias current by the first a scaling factor and a second modulation current scale factor, the first scaling factor and second scaling factor not greater than I; results actual current calculating unit configured to obtain a current cell according to the reference, the temperature comparison means and generating a scale factor calculation unit the actual bias current compensation value and the actual modulation current compensation value; a current compensation and control means, for compensating the laser bias current and modulation current compensation according to the actual current value actually output from the current calculation unit, and the modulating means of each unit unified control.
  9. 9.根据权利要求8所述的调制装置,其特征在于,所述装置还包括:偏置电流检测与获取单元,用于检测并获取激光器工作时的偏置电流值; 偏置电流比较单元,用于将偏置电流检测与获取单元获取的偏置电流值与设定偏置电流下限值与设定偏置电流上限值进行比较,并输出比较结果;以及比例因子调整单元,用于根据偏置电流比较单元的输出结果对所述比例因子生成单元所生成的第一比例因子和第二比例因子进行调整。 9. A modulation apparatus according to claim 8, characterized in that said apparatus further comprises: a bias current detection and acquisition unit for detecting when the bias current value and gain laser operating; bias current comparing unit, setting an upper limit value for the bias current and the bias current value and the lower limit value of the bias current setting acquiring unit acquires the detected bias current is compared, and outputting a comparison result; and the scale factor adjustment means for adjusted according to the bias current output of the first comparing unit generating a scale factor for the scale factor means and the generated second scaling factor.
  10. 10.根据权利要求8或9所述的调制装置,其特征在于,所述第一比例因子大于所述第二比例因子。 10. The modulator of claim 8 or claim 9, wherein the first scaling factor is larger than said second scaling factor.
CN 201210267384 2012-07-31 2012-07-31 Optical module working parameter adjusting method and adjusting device CN102761052A (en)

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