CN103474869A - Pulse optical fiber laser and control method thereof - Google Patents
Pulse optical fiber laser and control method thereof Download PDFInfo
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- CN103474869A CN103474869A CN 201310441215 CN201310441215A CN103474869A CN 103474869 A CN103474869 A CN 103474869A CN 201310441215 CN201310441215 CN 201310441215 CN 201310441215 A CN201310441215 A CN 201310441215A CN 103474869 A CN103474869 A CN 103474869A
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Abstract
The invention discloses a pulse optical fiber laser and a control method thereof. The control method comprises the steps of preseting, namely at least two driving currents of a pre-amplifying driving circuit are set to correspond to at least two setstates of a pre-amplifying module respectively, wherein the driving currents relate to a standby current and at least one work current, and correspondingly, the setstates relate to a standby state and at least one work state; controlling, namely a seed light source is controlled to stay in a normally open state; selecting one driving current of the pre-amplifying circuit to adjust the setstate of the pre-amplifying module; controlling a power amplification module with modulating signals. According to the pulse optical fiber laser and the control method thereof, balance among modulating speed, standby light leak and machine reliability is achieved in an MOPA type pulse optical fiber laser modulating process, the output property and stability of the laser are improved, and ASE self-excitation of a power amplifier stage is avoided.
Description
Technical field
The present invention relates to pulse optical fiber, in particular, a kind of pulse optical fiber and control method thereof.
Background technology
Pulsewidth is adjustable MOPA(Master Oscillator Power Amplifier, master control concussion fiber amplifier) the type pulse optical fiber has the advantages such as pulse duration is adjustable, high-peak power, repetition rate is high, switching speed is fast, MOPA type fiber laser is comprised of master oscillator (MO) and power amplifier (PA) two parts, and amplifier is divided into two-stage: pre-amplification level and power-amplifier stage.Wherein the parameter setting of MO and PA at different levels and sequential relationship are the design difficulties of MOPA type laser, directly affect its output characteristic and stability.
In fiber amplifier, mainly by following two kinds of methods, control the parameter of MO and PA at different levels: seed source and pre-amplification level are placed in to normally open, only power-amplifier stage are modulated; Perhaps, seed source, pre-amplification, power amplification are modulated respectively, accurately controlled three's sequential.
But, if seed source and pre-amplification level are placed in to normally open, laser will also have faint Laser output under holding state, affect the laser processing effect, and potential safety hazard is more arranged; If seed source, pre-amplification, power amplification are modulated respectively, the control logic complexity, very high to the laser controlling requirement, in the situation that the sequential confusion easily appears in complex conditions processing or fast modulation, affect the laser processing effect.
Therefore, there is defect in prior art, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new pulsewidth adjustable MOPA type pulse optical fiber and control method thereof.
Technical scheme of the present invention is as follows: a kind of control method of pulse optical fiber, it comprises the following steps: pre-set step: at least two kinds of drive currents that the pre-amplification drive circuit is set, at least two kinds of corresponding pre-amplification module arrange state respectively, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state; Control step: control seed light source and keep normally open; Select the described drive current of described pre-amplification drive circuit one, adjust the described state that arranges of described pre-amplification module; Adopt modulation signal power ratio control amplification module.
Preferably, in described control method, described to pre-set step further comprising the steps of: revise at least one described corresponding described drive current of state that arranges.
Preferably, in described control method, described control step is further comprising the steps of: detect described modulation signal, automatically select a kind of drive current of described pre-amplification drive circuit.
Preferably, in described control method, described control step is further comprising the steps of: read in advance described modulation signal, adjust in advance the working condition of described power amplifier module.
Preferably, in described control method, it is 1.15 to 1.25 peaces that described standby current is set, and described operating current is 1.95 to 2.05 peaces.
Another technical scheme of the present invention is, a kind of pulse optical fiber, and it comprises control circuit, drive circuit and light path; Described drive circuit comprises seed source drive circuit, pre-amplification drive circuit and power amplified drive circuit; Described light path comprises seed source laser, the first isolator, pre-amplification module, the second isolator, power amplifier module, the collimation output isolator that order arranges, and the laser order of described seed source laser is exported after described the first isolator, described pre-amplification module, described the second isolator, described power amplifier module, described collimation output isolator; Described seed source drive circuit connects respectively described control circuit, described seed source laser, under controlling at described control circuit, drives described seed source laser to keep normally open; Described pre-amplification drive circuit connects respectively described control circuit, described pre-amplification module, under controlling at described control circuit, adopt a drive current to drive described pre-amplification module, make its a kind of state that arranges in correspondence, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state; Described power amplified drive circuit connects respectively described control circuit, described power amplifier module, under controlling at described control circuit, by modulation signal, controls and drives described power amplifier module.
Preferably, in described pulse optical fiber, described control circuit also comprises a status register, and for storing at least two kinds of drive currents of described pre-amplification drive circuit, at least two kinds of corresponding pre-amplification module arrange state respectively.
Preferably, described pulse optical fiber also comprises an input equipment be connected with described status register, for arranging, revise or delete described state, the described drive current of arranging.
Preferably, in described pulse optical fiber, described control circuit also comprises a checkout equipment, for detection of described modulation signal, by described control circuit, automatically selects a kind of described drive current of described pre-amplification drive circuit.
Preferably, in described pulse optical fiber, the described state that arranges comprises holding state and operating state, and described drive current correspondence comprises standby current and operating current, and described standby current is 1.15 to 1.25 peaces, and described operating current is 1.95 to 2.05 peaces.
Adopt such scheme, the present invention has simplified control mode, makes laser works more reliable and more stable, can guarantee laser under waiting condition almost without Laser output, saved the energy, improved output characteristic and the stability of laser.
The accompanying drawing explanation
The structural representation that Fig. 1 is one embodiment of the present of invention;
The current diagram that Fig. 2 is one embodiment of the present of invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with the drawings and specific embodiments, the present invention will be described in more detail.Provided preferred embodiment of the present invention in accompanying drawing.But the present invention can realize in many different forms, is not limited to the described embodiment of this specification.On the contrary, provide the purpose of these embodiment be make the understanding of disclosure of the present invention more comprehensively thorough.
It should be noted that, when element is called as " being fixed in " another element, can directly can there be element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.The term that this specification is used " vertical ", " level ", " left side ", " right side " and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology that this specification is used are identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term used in specification of the present invention in this specification, just in order to describe the purpose of specific embodiment, is not for limiting the present invention.The term that this specification is used " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
One embodiment of the present of invention are, a kind of control method of pulse optical fiber, and it comprises the following steps.
Pre-set step: at least two kinds of drive currents that the pre-amplification drive circuit is set, at least two kinds of corresponding pre-amplification module arrange state respectively, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state; Preferably, adopt modular unit, automatically several state and the drive current of arranging prestores, automatically pre-set at least two kinds of drive currents of pre-described amplification driving circuit when access, at least two kinds of corresponding described pre-amplification module arrange state respectively, by controlling the drive current of described pre-amplification module, adjust it state is set; For example, described pre-amplification module is pre-amplification level pump laser; Can, in the large-scale production application, increase operating efficiency like this.For example, two kinds that pre-set described pre-amplification module arrange state, be respectively holding state and operating state, the standby current of the corresponding described pre-amplification module of holding state, the operating current of the corresponding described pre-amplification module of operating state,, two kinds of drive currents of pre-amplification drive circuit are set, and two of corresponding pre-amplification module kinds arrange state respectively, wherein, described drive current comprises standby current and operating current, and the described state correspondence that arranges comprises holding state and operating state.In upper example, the pre-amplification drive circuit is exported two kinds of drive currents, comprises standby current and the operating current of pre-amplification module, the holding state of corresponding pre-amplification module and operating state.
And for example, four kinds that pre-set described pre-amplification module arrange state, be respectively holding state and the first operating state, the second operating state, the 3rd operating state, the standby current of the corresponding described pre-amplification drive circuit of holding state, the first operating current of the corresponding described pre-amplification drive circuit of the first operating state, the second operating current of the corresponding described pre-amplification drive circuit of the second operating state, the 3rd operating current of the corresponding described pre-amplification drive circuit of the 3rd operating state; By that analogy.Like this, the output current of pre-amplification drive circuit can classification be set, to adapt to different work requirements.Preferably, two kinds that pre-set described pre-amplification module arrange state, the drive current of the corresponding described pre-amplification drive circuit of difference, and wherein, the described state that arranges comprises holding state and operating state, described drive current correspondence comprises standby current and operating current.
Preferably, described to pre-set step further comprising the steps of: revise at least one described corresponding described drive current of state that arranges.For example, the described standby current that holding state is corresponding is 1.2A, is revised as 1.21A.And for example, the first operating current corresponding to the first operating state is 2.0A, is revised as 1.96A.By that analogy.Like this, can, according to the real work situation, adjust in time, thereby obtain better modulation effect.
Control step: control seed light source and keep normally open, seed light source continues the output pulse; Select the described drive current of described pre-amplification drive circuit one, adjust the described state that arranges of described pre-amplification module; Adopt modulation signal power ratio control amplification module.For example, the drive current of described pre-amplification drive circuit is standby current, accordingly, selects the holding state of pre-amplification module, automatically adjusts the pre-amplification module in holding state, and for example, standby current is 1A, 1.1A or 1.2A; And for example, the drive current of selecting described pre-amplification drive circuit is operating current, accordingly, automatically adjusts the pre-amplification module in running order, and for example, operating current is 1.9A, 2.0A, 2.05A or 2.1A; Then adopt modulation signal power ratio control amplification module.As shown in Figure 2, the output of power amplifier module and outside modulation signal are consistent, and in other words, the operating current of power amplifier module is corresponding to the power of modulation signal.
Preferably, in described control method, described to pre-set step further comprising the steps of: revise at least one described corresponding described drive current of state that arranges.
Preferably, in described control method, described control step is further comprising the steps of: detect described modulation signal, automatically select a kind of drive current of described pre-amplification drive circuit.For example, detect described modulation signal, judge the working condition of described power amplifier module, the corresponding described modulation signal according to described working condition, automatically select a kind of drive current of described pre-amplification drive circuit, thereby make a kind of the arrange state of described pre-amplification module in correspondence, for example, judgement modulation signal power ratio control amplification module is not within a certain period of time done output, the drive current of automatically adjusting described pre-amplification drive circuit is standby current, automatically selects described pre-amplification module to enter holding state.Preferably, further comprising the steps of: as to detect described modulation signal, adjust the output state of described seed light source.Like this, for example, in the situation that determine not output, described seed light source can stop output, with energy savings, and extension device useful life; And for example, according to peak value, frequency and the intensity of described modulation signal, adjust the output of described seed light source, with the ability to work of overall enhanced equipment.
Be combined application with above-mentioned arbitrary embodiment, preferably, in described control method, described control step is further comprising the steps of: read in advance described modulation signal, adjust in advance the working condition of described power amplifier module, can increase work efficiency like this, for example, within 0.05 to 0.1 second, adjust in advance described power amplifier module, adaptive current modulation signal, synchronously complete output in time.
Preferably, in described control method, it is 1.15 to 1.25 peaces that described standby current is set, and described operating current is 1.95 to 2.05 peaces.Preferably, one preferably example be, it is 1.2 peaces that described standby current is set, described operating current is 2.0 peaces.
For example, as shown in Figure 2, seed light source continues the output pulse; The pre-amplification module has two kinds state is set, holding state and operating state, and corresponding pre-amplification level drive current comprises standby current and operating current, power-amplifier stage is modulated signal controlling, with its maintenance, synchronizes.
Another embodiment of the present invention is, a kind of pulse optical fiber, and it comprises control circuit, drive circuit and light path; Described drive circuit comprises seed source drive circuit, pre-amplification drive circuit and power amplified drive circuit; Described light path comprises seed source laser, the first isolator, pre-amplification module, the second isolator, power amplifier module, the collimation output isolator that order arranges, and the laser order of described seed source laser is exported after described the first isolator, described pre-amplification module, described the second isolator, described power amplifier module, described collimation output isolator; In this example, be provided with multi-stage power amplifier.
Described seed source drive circuit connects respectively described control circuit, described seed source laser, under controlling at described control circuit, drives described seed source laser to keep normally open; Control described seed source drive circuit output by described control circuit, make seed light source keep normally open.Preferably, adopt the main oscillations controller, adjust described control circuit, thereby adjust the duration, frequency etc. of the lasting output pulse of described seed source laser.
Described pre-amplification drive circuit connects respectively described control circuit, described pre-amplification module, under controlling at described control circuit, adopt a drive current to drive described pre-amplification module, make its a kind of state that arranges in correspondence, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state.
Described power amplified drive circuit connects respectively described control circuit, described power amplifier module, under controlling at described control circuit, by the external modulation signal controlling, drives described power amplifier module.
Preferably, in described pulse optical fiber, described control circuit also comprises a status register, and for storing at least two kinds of drive currents of described pre-amplification drive circuit, at least two kinds of corresponding pre-amplification module arrange state respectively.For example, described pre-amplification module has three kinds state is set, be respectively holding state and the first operating state, the second operating state, the standby current of the corresponding described pre-amplification drive circuit of holding state, the first operating current of the corresponding described pre-amplification drive circuit of the first operating state, the second operating current of the corresponding described pre-amplification drive circuit of the second operating state; For example, standby current is 1A, and the first operating current is 1.6A, and the second operating current is 2.2A.By that analogy.Like this, can classification adjust the output current of pre-amplification drive circuit, to adapt to different work requirements, make the application of product more extensive.
Preferably, state switcher also is set, by the output of control switching circuit, adjusts the drive current of described pre-amplification drive circuit, make the pre-amplification module in the different states that arranges.Described state switcher, for selecting a kind of described state that arranges, is adjusted the described drive current of described pre-amplification drive circuit.For example, described state switcher is selected the first operating state, and the drive current of automatically adjusting described pre-amplification drive circuit is the first operating current.And for example, described state switcher is selected holding state, and the drive current of automatically adjusting described pre-amplification drive circuit is standby current.
Preferably, described pulse optical fiber also comprises an input equipment be connected with described status register, for arranging, revise or delete described state, the described drive current of arranging; Like this, can adjust neatly drive current and the corresponding state that arranges thereof, especially, when machine is brought into use or is used a period of time, by finely tuning drive current, can be in more preferably mode of operation.Preferably, input equipment arranges matching unit, and it is complete arranges described state and the described drive current of arranging, and that is to say, when holding state is set, standby current need to be set; While inputting an operating state, operating current need to be set.Like this, can adjust flexibly described state, the described drive current of arranging.Preferably, described pulse optical fiber also comprises the modularization automatic out-putting device, its several state and drive current of arranging that prestore, at least two kinds of the described pre-amplification module of Lookup protocol arrange state, and the drive current of the corresponding described pre-amplification drive circuit of difference; Can, in the large-scale production application, increase operating efficiency like this.
Preferably, in described pulse optical fiber, described control circuit also comprises a checkout equipment, for detection of described modulation signal, by described control circuit, automatically selects a kind of described drive current of described pre-amplification drive circuit.For example, detect described modulation signal, judge the working condition of described power-amplifier stage amplifier, the corresponding described modulation signal according to described working condition, automatically select a kind of state that arranges of described pre-amplification module, for example, judgement modulation signal power ratio control amplifying stage amplifier is not within a certain period of time done output, automatically select described pre-amplification module to enter holding state, the drive current of automatically adjusting described pre-amplification drive circuit is standby current.Preferably, checkout equipment is a microprocessor and testing circuit thereof.
Preferably, described pulse optical fiber also comprise one with the equipment of reading in advance that described power-amplifier stage amplifier is connected respectively, for reading in advance described modulation signal, adjust in advance the working condition of described power-amplifier stage amplifier.Can increase work efficiency like this, for example, within 0.02 to 0.06 second, adjust described power-amplifier stage amplifier in advance, adaptive current modulation signal, synchronously complete output in time.For example, when modulation signal will peak value occur, within 0.02 second, adjust described power-amplifier stage amplifier in advance, ready, when peak value occurring, output in time.
Preferably, in described pulse optical fiber, the described state that arranges comprises holding state and operating state, and described drive current correspondence comprises standby current and operating current, and described standby current is 1.15 to 1.25 peaces, and described operating current is 1.95 to 2.05 peaces; For example, described standby current is 1.16 peaces, and described operating current is 2.04 peaces; And for example, described standby current is 1.18 peaces, and described operating current is 2.05 peaces; And for example, described standby current is 1.22 peaces, and described operating current is 2.05 peaces; And for example, described standby current is 1.24 peaces, and described operating current is 1.98 peaces.Preferably, one preferably example be, it is 1.2 peaces that described standby current is set, 1.2 amperes, described operating current is 2.0 peaces.
Another embodiment is that the MO of fiber laser is the LD(seed source of directly modulating), the method that the present embodiment is taked is: seed source keeps often opening, and continues the output pulse; The preset two states of pre-amplification level, i.e. holding state and operating state, two different driving electric currents of corresponding pre-amplification drive circuit; Power-amplifier stage is modulated signal controlling.Preferably, the preset two states electric current of pre-amplification level is respectively 1.2A and 2A.For example, for MOPA type pulse optical fiber, its seed source is often opened, that is, seed source continues the output pulse, the preset two states of pre-amplification level, and power-amplifier stage is modulated signal controlling.
Further, embodiments of the invention also comprise, each technical characterictic of the various embodiments described above, the pulse optical fiber mutually be combined to form and control method thereof, solved MOPA type pulse optical fiber in modulated process, modulating speed, standby light leak, machine reliability three's balance; Simplified control mode, made laser works more reliable and more stable; By suitable pre-amplification level standby current setting is set, can guarantee laser under waiting condition almost without Laser output.By suitable pre-amplification level standby current and operating current are set, in assurable modulated process, power-amplifier stage has enough flashlights to inject under various different conditions, avoid power-amplifier stage ASE(Amplified Spontaneous Emission, amplifying type autoradiolysis to occur) self-excitation.After tested, adopt laser power output<10mW under waiting condition of above scheme; The laser of employing above-described embodiment has effectively been avoided the ASE self-excitation of power-amplifier stage in modulated process, reduces the laser failure rate, and has improved modulating speed.
It should be noted that, above-mentioned each technical characterictic continues combination mutually, forms the various embodiment that do not enumerate in the above, all is considered as the scope of specification record of the present invention; And, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. the control method of a pulse optical fiber, is characterized in that, comprises the following steps:
Pre-set step: at least two kinds of drive currents that the pre-amplification drive circuit is set, at least two kinds of corresponding pre-amplification module arrange state respectively, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state;
Control step: control seed light source and keep normally open; Select the described drive current of described pre-amplification drive circuit one, adjust the described state that arranges of described pre-amplification module; Adopt modulation signal power ratio control amplification module.
2. control method according to claim 1, is characterized in that, described to pre-set step further comprising the steps of: revise at least one described corresponding described drive current of state that arranges.
3. control method according to claim 1, is characterized in that, described control step is further comprising the steps of: detect described modulation signal, automatically select a kind of drive current of described pre-amplification drive circuit.
4. control method according to claim 1, is characterized in that, described control step is further comprising the steps of: read in advance described modulation signal, adjust in advance the working condition of described power amplifier module.
5. according to the arbitrary described control method of claim 1 to 4, it is characterized in that, it is 1.15 to 1.25 peaces that described standby current is set, and described operating current is 1.95 to 2.05 peaces.
6. a pulse optical fiber, is characterized in that, comprises control circuit, drive circuit and light path;
Described drive circuit comprises seed source drive circuit, pre-amplification drive circuit and power amplified drive circuit;
Described light path comprises seed source laser, the first isolator, pre-amplification module, the second isolator, power amplifier module, the collimation output isolator that order arranges, and the laser order of described seed source laser is exported after described the first isolator, described pre-amplification module, described the second isolator, described power amplifier module, described collimation output isolator;
Described seed source drive circuit connects respectively described control circuit, described seed source laser, under controlling at described control circuit, drives described seed source laser to keep normally open;
Described pre-amplification drive circuit connects respectively described control circuit, described pre-amplification module, under controlling at described control circuit, adopt a drive current to drive described pre-amplification module, make its a kind of state that arranges in correspondence, wherein, described drive current comprises standby current and at least one operating current, and the described state correspondence that arranges comprises holding state and at least one operating state;
Described power amplified drive circuit connects respectively described control circuit, described power amplifier module, under controlling at described control circuit, by modulation signal, controls and drives described power amplifier module.
7. pulse optical fiber according to claim 6, is characterized in that, described control circuit also comprises a status register, and for storing at least two kinds of drive currents of described pre-amplification drive circuit, at least two kinds of corresponding pre-amplification module arrange state respectively.
8. pulse optical fiber according to claim 7, is characterized in that, also comprises an input equipment be connected with described status register, for arranging, revise or delete described state, the described drive current of arranging.
9. pulse optical fiber according to claim 6, is characterized in that, described control circuit also comprises a checkout equipment, for detection of described modulation signal, by described control circuit, automatically selects a kind of described drive current of described pre-amplification drive circuit.
10. according to the arbitrary described pulse optical fiber of claim 6 to 9, it is characterized in that, the described state that arranges comprises holding state and operating state, described drive current correspondence comprises standby current and operating current, described standby current is 1.15 to 1.25 peaces, and described operating current is 1.95 to 2.05 peaces.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191087A (en) * | 2014-09-26 | 2014-12-10 | 深圳市杰普特电子技术有限公司 | Processing method by adopting MOPA fiber laser device |
| CN105119134A (en) * | 2014-03-13 | 2015-12-02 | 恩耐激光技术有限公司 | Algorithms for rapid gating of seed suspendable pulsed fiber laser amplifiers |
| CN106684686A (en) * | 2015-12-08 | 2017-05-17 | 道中道激光科技有限公司 | Laser diode pumped laser device |
| CN106816806A (en) * | 2017-03-07 | 2017-06-09 | 深圳市杰普特光电股份有限公司 | Optical fiber laser |
-
2013
- 2013-09-25 CN CN201310441215.2A patent/CN103474869B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119134A (en) * | 2014-03-13 | 2015-12-02 | 恩耐激光技术有限公司 | Algorithms for rapid gating of seed suspendable pulsed fiber laser amplifiers |
| CN104191087A (en) * | 2014-09-26 | 2014-12-10 | 深圳市杰普特电子技术有限公司 | Processing method by adopting MOPA fiber laser device |
| CN104191087B (en) * | 2014-09-26 | 2017-11-24 | 深圳市杰普特光电股份有限公司 | A kind of processing method using MOPA optical fiber lasers |
| CN106684686A (en) * | 2015-12-08 | 2017-05-17 | 道中道激光科技有限公司 | Laser diode pumped laser device |
| CN106816806A (en) * | 2017-03-07 | 2017-06-09 | 深圳市杰普特光电股份有限公司 | Optical fiber laser |
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Inventor after: Mo Jinyu Inventor after: Zhu Jiangjie Inventor after: Liu Meng Inventor after: Cheng Xueping Inventor after: Zhao Chongguang Inventor before: Zhu Jiangjie Inventor before: Liu Meng Inventor before: Cheng Xueping Inventor before: Zhao Chongguang |
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Free format text: CORRECT: INVENTOR; FROM: ZHU JIANGJIE LIU MENG CHENG XUEPING ZHAO CHONGGUANG TO: MO JINYU ZHU JIANGJIE LIU MENG CHENG XUEPING ZHAO CHONGGUANG |
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Address after: 518000 Guangdong Province, Shenzhen city Longhua District Guanlan Street No. 5 Wu Lu Sheng Keng community view science and Technology Building No. 1 South and west of the factory floor Patentee after: SHENZHEN JPT OPTO-ELECTRONICS CO., LTD. Address before: 518000 Guangdong city of Shenzhen province Baoan District Guanlan Street Guanlan high-tech park Tellhow (Shenzhen) Industrial Park building, third floor South West Patentee before: Shenzhen Jpt Electronics Co., Ltd. |
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Inventor after: Zhu Jiangjie Inventor after: Liu Meng Inventor after: Cheng Xueping Inventor after: Zhao Chongguang Inventor before: Mo Jinyu Inventor before: Zhu Jiangjie Inventor before: Liu Meng Inventor before: Cheng Xueping Inventor before: Zhao Chongguang |
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| COR | Change of bibliographic data |