CN204205280U - A kind of high power semi-conductor pulse laser module - Google Patents

A kind of high power semi-conductor pulse laser module Download PDF

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Publication number
CN204205280U
CN204205280U CN201420694176.7U CN201420694176U CN204205280U CN 204205280 U CN204205280 U CN 204205280U CN 201420694176 U CN201420694176 U CN 201420694176U CN 204205280 U CN204205280 U CN 204205280U
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China
Prior art keywords
laser module
chip microcomputer
output
high power
pulse laser
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Expired - Fee Related
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CN201420694176.7U
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Chinese (zh)
Inventor
胡丹峰
王加俊
方二喜
邹玮
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Suzhou University
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Suzhou University
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Abstract

The utility model discloses a kind of high power semi-conductor pulse laser module, comprise laser module, first, second source and signal generator, it is characterized in that: first, second source is connected with laser module through protective circuit, protective circuit comprises adjustment and output, adjustment portion comprises and first, first of second source connection, second voltage regulator circuit, single-chip microcomputer and comparator, first power supply is connected with single-chip microcomputer through the first voltage regulator circuit, second source is connected with single-chip microcomputer through the second voltage regulator circuit and comparator, single-chip microcomputer is connected with laser module, output comprises first, second relay be connected with first, second supply voltage, and first, second relay output end is connected with laser module, and its control end is connected with single-chip microcomputer, signal generator output is connected with single-chip microcomputer.The utility model, by arranging protective circuit, is monitored voltage and duty ratio, thus can effectively protect laser module.

Description

A kind of high power semi-conductor pulse laser module
Technical field
The utility model relates to a kind of laser module, is specifically related to a kind of high power semi-conductor pulse laser module with protection mechanism.
Background technology
At photoacoustic imaging, semiconductor laser is used to need to have following requirement in the fields such as atmospheric monitoring: instantaneous power large (> 100W), burst length short (ns level), repetition rate high (> 1KHz), IPC and the ILC series laser module of the such as POWER TECHNOLOGY company generally used on the market at present, the high power semi-conductor pulse laser modules such as the pulsed laser diode of the 905d series of LASER COMPONENTS company and the combination of LSP-40 driver module all can reach the requirement of above-mentioned performance index.The triggering signal that these modules control the pulsewidth of the output pulse of lasers and electric current (with power positive correlation) by two magnitudes of voltage of extraneous input in use, inputted by trigger interface controls the output frequency of laser.This kind of laser module has strict requirement for the laser pulse duty ratio exported and control voltage value, will damage corresponding laser diode, thus cause the disabler of whole module when not meeting the demands.
Specifically see shown in accompanying drawing, Fig. 1 is the interface diagram of laser module, wherein M pin is current monitoring interface, T pin is for triggering input interface, what T pin inputted is periodic pulse signal, be used for controlling the frequency of laser pulse, that is this interface often inputs a signal of telecommunication pulse, and laser just exports a laser pulse.In Fig. 1,2 pin are Current Control interface, namely by the output current of voltage control laser module; 3 pin are pulse width control interface, namely by the pulse duration of voltage control laser module output.Due to this type of laser module in use, if the magnitude of voltage of Current Control interface input and the duty ratio of pulse limit beyond it, then can damage corresponding laser.
For above-mentioned deficiency, need to design magnitude of voltage and the pulse duty factor that a kind of protective device can detect input, automatically can disconnect input electrical connection when not meeting the demands, thus high power semi-conductor pulse laser module is protected.
Summary of the invention
The utility model object is to provide a kind of high power semi-conductor pulse laser module, by the improvement to structure, realizes monitoring the voltage inputted and duty ratio, thus can effectively protect high power semi-conductor pulse laser module.
The technical solution of the utility model is: a kind of high power semi-conductor pulse laser module, comprise high power semi-conductor pulse laser module, first power supply, second source and signal generator, described first power supply, second source is electrically connected with described high power semi-conductor pulse laser module through protective circuit, described protective circuit comprises adjustment portion and output, described adjustment portion comprise respectively with the first power supply, first of second source connection, second voltage regulator circuit, one single-chip microcomputer and a comparator, described first power output end is connected with described single-chip microcomputer through the first voltage regulator circuit, described second source output is connected with described single-chip microcomputer through the second voltage regulator circuit and comparator, the output of described single-chip microcomputer is connected with described high power semi-conductor pulse laser module, described output comprises first, second relay be connected with first, second supply voltage output described respectively, the output of first, second relay described is connected with high power semi-conductor pulse laser module, and the control end of first, second relay described is connected with described single-chip microcomputer, the output of described signal generator is connected with described single-chip microcomputer.
Further technical scheme, also comprises a display circuit, and described display circuit is connected with the output of described single-chip microcomputer.
Further technical scheme, is also connected with the first A/D converter between described first voltage regulator circuit and described single-chip microcomputer.
Further technical scheme, described high power semi-conductor pulse laser module is connected with described single-chip microcomputer through the second A/D converter.
The utility model has the advantages that: the utility model by arranging protective circuit between first, second power supply and high power semi-conductor pulse laser module; this protective circuit comprises single-chip microcomputer, first and second relay, first and second voltage regulator circuit, A/D converter, comparator and display circuit; by single-chip microcomputer, the voltage of input high power semi-conductor pulse laser module and duty ratio are monitored; thus control the folding of first and second relay; realize the protection to high power semi-conductor pulse laser module, avoid it to damage.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the interface diagram of laser module in prior art;
Fig. 2 is the theory diagram of the utility model embodiment one.
Embodiment
Embodiment one: shown in Figure 2, a kind of high power semi-conductor pulse laser module, comprise high power semi-conductor pulse laser module, first power supply, second source and signal generator, described first power supply, second source is electrically connected with described high power semi-conductor pulse laser module through protective circuit, described protective circuit comprises adjustment portion and output, described adjustment portion comprise respectively with the first power supply, first of second source connection, second voltage regulator circuit, one single-chip microcomputer and a comparator, described first power output end is connected with described single-chip microcomputer through the first voltage regulator circuit, described second source output is connected with described single-chip microcomputer through the second voltage regulator circuit and comparator, the output of described single-chip microcomputer is connected with described high power semi-conductor pulse laser module, described output comprises first, second relay be connected with first, second supply voltage output described respectively, the output of first, second relay described is connected with high power semi-conductor pulse laser module, and the control end of first, second relay described is connected with described single-chip microcomputer, the output of described signal generator is connected with described single-chip microcomputer.
Also comprise a display circuit, described display circuit is connected with the output of described single-chip microcomputer.Also be connected with the first A/D converter between described first voltage regulator circuit and described single-chip microcomputer, described high power semi-conductor pulse laser module is connected with described single-chip microcomputer through the second A/D converter.
First power supply is the adjustment for laser module output pulse width, and this voltage can be regulated continuously by the knob on the first power supply, scope of its input between 29.6V ~ 40.7V, the corresponding pulsewidth 100ns ~ 200ns exported.In the present embodiment, first this road voltage pass through the first voltage regulator circuit by between this voltage-regulation to 0 ~ 5V, then send into after A/D converter in single-chip microcomputer to realize the monitoring to this road voltage, single-chip microcomputer can calculate the pulsewidth τ second of its correspondence according to the voltage collected, and is shown by this pwm value feeding display circuit; Meanwhile, this road voltage is linked in high power semi-conductor pulse laser module by one group of normally opened contact of the first relay.
Signal generator is for generation of triggering signal, and its square-wave signal exported exports the frequency of pulse for controlling laser module, this signal is directly inputted in laser module and single-chip microcomputer.The frequency values fHz of this pulse can be monitored by single-chip microcomputer and send into display circuit and show.If this laser module is≤M (M is generally 0.02%) for the duty-cycle requirement of control signal, then can do following computing in single-chip microcomputer: Duty=τ f, if now Duty≤M, then show that now control signal meets the demands for the control of duty ratio, single-chip microcomputer exports control signal and controls the first relay adhesive, the voltage of the first power supply now can be linked in high power semi-conductor pulse laser module, and display circuit display duty ratio is normal; If now Duty > M; then single-chip microcomputer exports control signal and makes the first relay disconnection; the voltage of the first power supply is not now connected with high power semi-conductor pulse laser module, and display circuit provides warning message simultaneously, thus protects this laser module.
Second source is the adjustment for laser output current, and this voltage can be regulated continuously by the knob on second source, and the maximum of its input is 45V, and the corresponding electric current exported is 30A, if more than 45V, can shine into the damage of laser module.In the present embodiment, first this road voltage pass through the second voltage regulator circuit by between this voltage-regulation to 0 ~ 5V, then compare through comparator and a certain default fixed voltage value, if exceed this magnitude of voltage, mean that this road voltage is more than 45V, comparator now can export high level, otherwise can output low level.Comparator exports the interrupt pin of single-chip microcomputer to, and the high speed that can realize whether exceeding this road voltage threshold value judges.Meanwhile, this road voltage is linked in high power semiconductor lasers module by one group of normally opened contact of the second relay.If single-chip microcomputer detects that the output of comparator is low level, then export control signal and control the second relay adhesive, this road voltage now can be linked in high power semi-conductor pulse laser module, and display circuit display voltage is normal; If detect, the output of comparator is high level; then exporting control signal makes the second relay disconnect; this road voltage is not now connected with high power semi-conductor pulse laser module, and display circuit provides warning message simultaneously, thus protects this laser module.
The signal that the current detecting port of high power semi-conductor pulse laser module exports sends into single-chip microcomputer collection after the second A/D converter, then is sent to display circuit and shows in real time for the output current of reality.
Detailed process is as follows:
If the pulse duty factor of laser module is 0.02% to the maximum, when the pulse frequency triggering input interface input is 1kHz, the output pulse width of laser is now 1ms*0.02%=200ns to the maximum, and namely pulse width control interface voltage can not more than 200ns, corresponding voltage 40.7V; When the pulse frequency triggering input interface input is 2kHz, now the output pulse width of laser is 0.5ms*0.02%=100ns to the maximum, and namely pulse width control interface voltage can not more than 29.6V.When practical operation:
(1) first opening signal generator, is adjusted to the square-wave signal of required frequency, and the pulse frequency of single-chip microcomputer to input detects and calculate, and shows in display circuit;
(2) the first power supply is opened, regulate its output voltage, the voltage of single-chip microcomputer to the first power supply detects and shows, and whether exceedes setting simultaneously judge this voltage, if within normal range (NR), single-chip microcomputer exports control signal and connects the first relay; If during overrun, disconnect this relay, and carry out alarm indication in display circuit;
(3) second source is opened, regulate its output voltage, the voltage of single-chip microcomputer to second source detects and shows, and whether exceedes setting simultaneously judge this voltage, if within normal range (NR), single-chip microcomputer exports control signal and connects the second relay; If when exceeding, disconnect this relay, and carry out alarm indication in display circuit.
By arranging protection mechanism between power supply and high power semi-conductor pulse laser module in the present embodiment; the voltage of input and the duty ratio of control are monitored; initiatively can disconnect input when these values exceed the scope of regulation, thus play the object of protection laser module.
Certain above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All modifications done according to the Spirit Essence of the utility model main technical schemes, all should be encompassed within protection range of the present utility model.

Claims (4)

1. a high power semi-conductor pulse laser module, comprise high power semi-conductor pulse laser module, first power supply, second source and signal generator, it is characterized in that: described first power supply, second source is electrically connected with described high power semi-conductor pulse laser module through protective circuit, described protective circuit comprises adjustment portion and output, described adjustment portion comprise respectively with the first power supply, first of second source connection, second voltage regulator circuit, one single-chip microcomputer and a comparator, described first power output end is connected with described single-chip microcomputer through the first voltage regulator circuit, described second source output is connected with described single-chip microcomputer through the second voltage regulator circuit and comparator, the output of described single-chip microcomputer is connected with described high power semi-conductor pulse laser module, described output comprises first, second relay be connected with first, second supply voltage output described respectively, the output of first, second relay described is connected with high power semi-conductor pulse laser module, and the control end of first, second relay described is connected with described single-chip microcomputer, the output of described signal generator is connected with described single-chip microcomputer.
2. a kind of high power semi-conductor pulse laser module according to claim 1, it is characterized in that: also comprise a display circuit, described display circuit is connected with the output of described single-chip microcomputer.
3. a kind of high power semi-conductor pulse laser module according to claim 1, is characterized in that: be also connected with the first A/D converter between described first voltage regulator circuit and described single-chip microcomputer.
4. a kind of high power semi-conductor pulse laser module according to claim 1, is characterized in that: described high power semi-conductor pulse laser module is connected with described single-chip microcomputer through the second A/D converter.
CN201420694176.7U 2014-11-18 2014-11-18 A kind of high power semi-conductor pulse laser module Expired - Fee Related CN204205280U (en)

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CN201420694176.7U CN204205280U (en) 2014-11-18 2014-11-18 A kind of high power semi-conductor pulse laser module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420694176.7U CN204205280U (en) 2014-11-18 2014-11-18 A kind of high power semi-conductor pulse laser module

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110391587A (en) * 2018-04-16 2019-10-29 盐城物科光电有限公司 The laser aid of flight

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110391587A (en) * 2018-04-16 2019-10-29 盐城物科光电有限公司 The laser aid of flight

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150311

Termination date: 20171118

CF01 Termination of patent right due to non-payment of annual fee