CN207217998U - Self-compensation type semiconductor laser apparatus - Google Patents
Self-compensation type semiconductor laser apparatus Download PDFInfo
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- CN207217998U CN207217998U CN201720696175.XU CN201720696175U CN207217998U CN 207217998 U CN207217998 U CN 207217998U CN 201720696175 U CN201720696175 U CN 201720696175U CN 207217998 U CN207217998 U CN 207217998U
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- module
- constant temperature
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- optic modulator
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Abstract
It the utility model is related to a kind of self-compensation type semiconductor laser apparatus, including laser module, acousto-optic modulator module, light splitting piece module, traditional frequency discrimination environment module, wound thermostat module, compensation circuit module；In the utility model, by the function of compensation circuit module, on the basis of traditional frequency discrimination Environmental Technology, closed loop compensation response is formd, makes output more stable to the laser optical frequency of the actual optical physics environment of user terminal.And by wound thermostat module acousto-optic modulator module can be made to be under steady operation situation.
Description
Technical field
It the utility model is related to field of lasers, and in particular to a kind of self-compensation type semiconductor laser apparatus.
Background technology
It is more multi-field in hyundai electronicses Line technology to employ digitlization core with the extensive use of digital integration chip
Piece is integrated to substitute the independent component of tradition, so as to build the circuit module that integrated level is high, precision is high.In semiconductor laser
In servo circuit, employ both at home and abroad DDS and integrated level it is high processing processor complete whole system Closed loop operation.At this
During a little digitlization highly integrated chip applications, the response speed of its circuit easily reaches 1 μ s magnitudes（Less than semiconductor laser
The loop response time）, but in a specific semiconductor laser, due to its internal physical system mechanism, Yi Jixian
There is the limitation of sequencing digital control technology, cause actual system loop to respond effect and fail to reach the set goal.
Utility model content
The technical problems to be solved in the utility model is：It is proposed it is a kind of be integrated with the servo circuit with compensation function swash
Light device device.
The utility model is to solve the technical scheme that above-mentioned technical problem proposes to be：A kind of self-compensation type semiconductor laser
Device, including laser module, acousto-optic modulator module, light splitting piece module, traditional frequency discrimination environment module, wound thermostat module,
Compensation circuit module；
The laser module is suitable to output optical frequency signal；
Acousto-optic modulator module is suitable to close by the optical frequency signal and by the radiofrequency signal of compensation circuit module output
The light splitting piece module is sent into and by optical signal after synthesis；
The light splitting piece module is suitable to the optical signal being divided at least two-way, wherein being sent to traditional frequency discrimination ring all the way
Border module, wherein another way are sent to actual optical physics environment；
Traditional frequency discrimination environment module is suitable to optical signal progress frequency discrimination is handled to obtain light inspection signal, and by described in
Light inspection signal delivers to the compensation circuit module；
The wound thermostat module is suitable for acousto-optic modulator module and provides stationary temperature environment；
The compensation circuit module is made up of VCXO module, DDS module and microprocessor, the VCXO mould
First external clock reference signal output end of block and the second external clock reference signal output end are connected respectively to the DDS moulds
Block and microprocessor and external clock reference signal input,
The control terminal of the microprocessor is connected respectively to the DDS module, traditional frequency discrimination environment module and VCXO
The controlled end of module, the radiofrequency signal of the DDS module are exported to the acousto-optic modulator module.
Further, the wound thermostat module is by the constant temperature wall that surrounds on four sides and closed off on the constant temperature wall top
The hexahedron structure that the constant temperature lid of portion and bottom, constant temperature bottom are formed, the acousto-optic modulator module are fixed on the wound constant temperature
Inside modules, it is all provided with being laid with shielding metal leve on the medial surface at the constant temperature bottom, constant temperature lid and constant temperature wall,
The constant temperature bottom is provided with acousto-optic modulator module fixing screws, and the constant temperature bottom is internally provided with warming resistance,
The both sides at the constant temperature bottom are respectively provided with a photoinduction sensor for being served only for detecting constant temperature bottom light leak respectively,
The middle part of the constant temperature lid is provided with a wire hole only for threading, and enamel-cover electric induced line is introduced in wire hole, described
Enamel-cover electric induced line is connected to the acousto-optic modulator module, and the constant temperature is covered provided with a heating resistance, the constant temperature lid
Both sides are also respectively provided with a photoinduction sensor for being served only for detecting light intensity respectively；
Heated under the control of temperature control circuit of the heating resistance in outside, the signal output of the warming resistance is extremely
The temperature control circuit.
Further, the microprocessor is suitable to the corresponding frequency with FSK modulation that DDS is controlled by serial timing command word
The output of rate signal；
The microprocessor is further adapted for according to the synchronous phase discrimination signal meter having with DDS fsk modulated signal with frequency with phase
Calculate voltage control signal and to act on VCXO.
Further, the MCLK pins of the DDS module are used for the first external clock for connecting the VCXO module
Reference signal output end.
Further, the FSELECT pins of the DDS module are keying FM signal input.
The beneficial effects of the utility model are：
In the utility model, pass through the function of compensation circuit module, on the basis of traditional frequency discrimination Environmental Technology, shape
Compensate and respond into closed loop, make output more stable to the laser optical frequency of the actual optical physics environment of user terminal.And by around
Formula thermostat module can be such that acousto-optic modulator module is under steady operation situation.
Brief description of the drawings
Self-compensation type semiconductor laser apparatus of the present utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structured flowchart of self-compensation type semiconductor laser apparatus in the utility model；
Fig. 2 is the structured flowchart of compensation circuit module；
Fig. 3 is the pin connection figure of DDS module；
Fig. 4 is the timing diagram of DDS module and extraneous serial communication；
The structural representation of Fig. 5 thermostat modules；
Fig. 6 is the structural representation at constant temperature bottom；
Fig. 7 is the structural representation of constant temperature lid.
Embodiment
According to Fig. 1, the self-compensation type semiconductor laser apparatus in the utility model, including laser module, sound
Optical modulator module（AOM）, light splitting piece module, traditional frequency discrimination environment module, wound thermostat module, compensation circuit module.
Laser module is suitable to output optical frequency signal.
Acousto-optic modulator module is suitable to synthesize optical frequency signal and the radiofrequency signal exported by compensation circuit module and will closed
Optical signal after is sent to light splitting piece module.
Light splitting piece module is suitable to optical signal being divided at least two-way, wherein traditional frequency discrimination environment module is sent to all the way, wherein
Another way is sent to actual optical physics environment.
Traditional frequency discrimination environment module is suitable to optical signal progress frequency discrimination is handled to obtain light inspection signal, and light inspection signal is delivered to
Compensation circuit module.
Wound thermostat module is suitable for acousto-optic modulator module and provides stationary temperature environment.
As shown in Fig. 2 compensation circuit module is made up of VCXO module, DDS module and microprocessor, VCXO
First external clock reference signal output end of module and the second external clock reference signal output end are connected respectively to DDS module
With microprocessor and external clock reference signal input.
The control terminal of microprocessor be connected respectively to DDS module, traditional frequency discrimination environment module and VCXO module by
End is controlled, the radiofrequency signal of DDS module is exported to acousto-optic modulator module.
It can be used as preferably：As shown in Fig. 5, Fig. 6 and Fig. 7, wound thermostat module is the constant temperature wall 1 by surrounding on four sides
With close off the hexahedron structure that is formed at the constant temperature lid 2 of the top of constant temperature wall 1 and bottom, constant temperature bottom 3, acousto-optic modulator module
It is fixed on inside wound thermostat module, is all provided with being laid with shielding metal on the medial surface at constant temperature bottom 3, constant temperature lid 2 and constant temperature wall 1
Layer.Constant temperature bottom 3 is provided with acousto-optic modulator module fixing screws 4, and constant temperature bottom 3 is internally provided with warming resistance 5, constant temperature bottom 3
Both sides are respectively provided with a photoinduction sensor 6 for being served only for detecting light leak at constant temperature bottom 3 respectively.The middle part of constant temperature lid 2 is provided with one
For the wire hole of threading, enamel-cover electric induced line 7 is introduced in wire hole, enamel-cover electric induced line 7 is connected to acousto-optic modulator module, permanent
Warm lid 2 is provided with a heating resistance 8, and the both sides of constant temperature lid 2 are also respectively provided with a light sensation inductive sensing for being served only for detecting light intensity respectively
Device 6.Heating resistance 8 is heated under the control of the temperature control circuit of outside, the signal output of warming resistance 5 to temperature control circuit.
It can be used as preferably：Microprocessor is suitable to the corresponding band FSK modulation that DDS is controlled by serial timing command word
Frequency signal output.Microprocessor is further adapted for according to the synchronous phase demodulation letter having with DDS fsk modulated signal with frequency with phase
Number calculate voltage control signal and to act on VCXO.
Wherein, the MCLK pins of DDS module are used for the first external clock reference signal output for connecting VCXO module
End.MCLK pins connect external clock reference, make the stability and external clock reference one of DDS IOUT pin output end frequency signals
Cause.For the internal DDS chips without PLL frequency multiplication links, the frequency in usual MCLK ends input clock source should be higher than that IOUT ends are defeated
Going out 4 times of signal frequency, if output signal frequency is 5MHz, then the signal frequency of MCLK clock ends should be more than 20MHz, with
It is expected to obtain more preferable phase noise, after filtered external circuit, purer signal spectrum can be obtained.FSELECT is key
FM signal input, that is, our modulated square wave signal input part are controlled, there are two frequency control registers inside DDS,
The frequency value F 0 pre-set, F1 are preserved in a register, when there is square-wave signal at FSELECT ends by way of programming
During input (level rising edge or trailing edge conversion), DDS IOUT ends will be read from frequency control register respectively therewith
Go out F1 or F0 value as output, and the phase of signal can be kept unchanged.PSEL0, PSEL1 be two paths of signals frequency F1,
F0 phase adjusted end, in the application, we intend keeping the Phase Continuation of F1, F0 in switching, therefore directly will in the design
PSEL0, PSEL1 are grounded.DDS is by pin FSYNC, SCLK, SDATA with extraneous primary communications (such as F1, F0 value) sequential
Come what is completed, the sequential of its serial communication is as shown in Figure 4.When FSYNC is high level, SCLK, SDATA pins are high resistant shape
State.When FSYNC is low level, DDS will be in communication state, when now pin SCLK has the pulse of a trailing edge, will make extension
DATA write-in DDS data buffer zones on data/address bus SDATA, until during final DATA write-ins, DDS will be according to pin
Outputs of the condition selecting F1 or F0 as IOUT ends on FSELECT.
For inside without PLL times of frequency module DDS chip, the external clock frequency of pin MCLK inputs is the clock of system
Frequency, exemplified by exporting 5MHz frequency signals, MCLK input end of clock signal frequency is 20MHz.There are 2 32 inside DDS
Frequency control register（F0、F1）, in above-mentioned serial communication sequential, DATA positions should be 32.It follows that in this MCLK
During outside input clock frequency 20MHz, AD9832 minimum frequency resolution is：
When IOUT exports 20MHz, the value of corresponding 32 bit frequency control register is all 1；When exporting 5MHz, corresponding number
It is worth and is（5MHz/20MHz）× 232, resulting decimal value is converted into the corresponding 32 bit frequency control registers of binary system
Value.According to serial communication sequential, corresponding 32 place value is written in corresponding frequency control register by microprocessor（Such as
F0）.32 place values also can be written to corresponding frequency by same principle, the another way single-frequency of modulation by similar method
In control register（Such as F1）.By the height for changing DDS pin FSELECT level, it is possible to realize F0, F1 frequency internally
Between switching, so as to export keying FM signal.The signal for wherein changing pin FSELECT level is produced by single-chip microcomputer.
In order to realize keying frequency modulation and synchronous phase demodulation, composite demand produce mutual phase relation clearly it is adjustable all the way
Modulated signal and two road 79Hz synchronization phase demodulation reference signals, the generation of these signals pass through corresponding clock by a microprocessor
Interrupt or crossover rate technology is realized.
Keying FM signal A is a dutycycle 1：1 square-wave signal, act on DDS FSELECT ends；For servo
The signal B and C of loop synchronization phase demodulation are also rectangular pulse, have fixed phase relation with A roads signal, and dutycycle is not 1：1.
In design, above-mentioned each road signal is realized using 16 bit timing devices inside single-chip microcomputer, the single-chip microcomputer actually selected
Machine cycle is 0.2mS.Define a variable T, circulated to realize.(such as P2.0) is realized on the corresponding pin of single-chip microcomputer
Square wave A in upper figure, P2.0 pin levels need to only be negated in corresponding 16 bit timing device overflows interrupt response function（P2.0
=！P2.0）.Same reason, (P2.2, P2.3) B and C two-way square-wave signals can be realized on single-chip microcomputer another two pin,
Simply B and C is that have certain phase shift with P2.0 in phase, and dutycycle is not 1：1 square wave.The method of realization is " delay ",
That is digital phase shift." delay " is to perform cycle sentence by fixed machine to realize in single-chip microcomputer, the above-mentioned machine referred to
The device cycle is determined by the frequency for being added in the external timing signal at Singlechip clock end, in the execution of its tangible each sentence
Also it can be related to and perform the cycle, the difference of different sentences order behavior performed by can be respectively 1,2,4 machine weeks
Phase, but the cycle that same sentence performs is fixed, this just provides guarantee for " delay " mechanism.
It is to be noted that：During single-chip microcomputer performs, due to inserting many work(in timer interruption function
Energy sentence, such as " judgement on edge ", " assignment " are required to hold when this will cause timer interruption function response each time
Capable sentence is inconsistent, that is, the machine cycle sum undergone is inconsistent, is said from stability angle, and this certainly will cause caused several
Road signal is simultaneously unstable, but due to servo phase demodulation reference pulse（P2.2、P2.3）With keying FM signal（P2.0）Producing
It is close association in program, though several signals frequency is varied from, but synchronous phase demodulation reference pulse and square-wave modulation signal
Phase relation be stable all the time.This point is considerable for servo circuit.
It is of the present utility model to be not limited to above-described embodiment, the technical scheme of above-mentioned each embodiment of the present utility model that
This can form new technical scheme with combined crosswise, and all technical schemes formed using equivalent substitution, all fall within this practicality in addition
In the protection domain of new requirement.
Claims (2)
- A kind of 1. self-compensation type semiconductor laser apparatus, it is characterised in that：Including laser module, acousto-optic modulator module, Light splitting piece module, traditional frequency discrimination environment module, wound thermostat module, compensation circuit module；The laser module is suitable to output optical frequency signal；Acousto-optic modulator module is suitable to synthesize the optical frequency signal and the radiofrequency signal exported by the compensation circuit module simultaneously Optical signal after synthesis is sent to the light splitting piece module；The light splitting piece module is suitable to the optical signal being divided at least two-way, wherein being sent to traditional frequency discrimination environment mould all the way Block, wherein another way are sent to actual optical physics environment；Traditional frequency discrimination environment module is suitable to optical signal progress frequency discrimination is handled to obtain light inspection signal, and the light is examined Signal delivers to the compensation circuit module；The wound thermostat module is suitable for acousto-optic modulator module and provides stationary temperature environment；The compensation circuit module is made up of VCXO module, DDS module and microprocessor, the VCXO module First external clock reference signal output end and the second external clock reference signal output end be connected respectively to the DDS module and Microprocessor and external clock reference signal input,The control terminal of the microprocessor is connected respectively to the DDS module, traditional frequency discrimination environment module and VCXO module Controlled end, the radiofrequency signal of the DDS module exported to the acousto-optic modulator module.
- 2. self-compensation type semiconductor laser apparatus according to claim 1, it is characterised in that：The wound thermostat module is By the constant temperature wall surrounded on four sides and close off the hexahedron that at the top of the constant temperature wall and the constant temperature lid of bottom, constant temperature bottom are formed Structure, the acousto-optic modulator module are fixed on inside the wound thermostat module, the constant temperature bottom, constant temperature lid and constant temperature wall It is all provided with being laid with shielding metal leve on medial surface,The constant temperature bottom is provided with acousto-optic modulator module fixing screws, and the constant temperature bottom is internally provided with warming resistance, described The both sides at constant temperature bottom are respectively provided with a photoinduction sensor for being served only for detecting constant temperature bottom light leak respectively,The middle part of the constant temperature lid is provided with a wire hole only for threading, and enamel-cover electric induced line, the enamel-cover are introduced in wire hole Electric induced line is connected to the acousto-optic modulator module, and the constant temperature is covered provided with a heating resistance, the both sides of the constant temperature lid Also a photoinduction sensor for being served only for detecting light intensity is respectively provided with respectively；Heated under the control of temperature control circuit of the heating resistance in outside, the signal output of the warming resistance is to described Temperature control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720696175.XU CN207217998U (en) | 2017-06-15 | 2017-06-15 | Self-compensation type semiconductor laser apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720696175.XU CN207217998U (en) | 2017-06-15 | 2017-06-15 | Self-compensation type semiconductor laser apparatus |
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| Publication Number | Publication Date |
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| CN207217998U true CN207217998U (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720696175.XU Expired - Fee Related CN207217998U (en) | 2017-06-15 | 2017-06-15 | Self-compensation type semiconductor laser apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112213266A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
-
2017
- 2017-06-15 CN CN201720696175.XU patent/CN207217998U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112213266A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
| CN112213266B (en) * | 2020-09-29 | 2021-05-14 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180410 Termination date: 20190615 |