CN104134923A - Device and method of generating high-speed picosecond narrow pulse laser - Google Patents
Device and method of generating high-speed picosecond narrow pulse laser Download PDFInfo
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- CN104134923A CN104134923A CN201410355365.6A CN201410355365A CN104134923A CN 104134923 A CN104134923 A CN 104134923A CN 201410355365 A CN201410355365 A CN 201410355365A CN 104134923 A CN104134923 A CN 104134923A
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Abstract
The invention discloses a device of generating high-speed picosecond narrow pulse laser. A control module is electrically connected with a signal driving module, a constant current compensation module and a temperature control module respectively; the signal driving module, the constant current compensation module and the temperature control module are electrically connected with a laser tube; the control module converts an input triggering signal into a radio frequency driving signal by the signal driving module, and outputs the radio frequency driving signal to the laser tube to drive a laser device to work at a constant temperature to output laser; the control module controls the working temperature of the laser tube by the temperature control module to allow the laser device to work at a constant temperature; and the control module controls the magnitude of compensation current by the constant current compensation module to allow the laser device to output at constant current. The invention further discloses a method of generating the high-speed picosecond narrow pulse laser. The device is stable in output, can be suitable for a quantum key distribution system with quantum light and synchronous light multiplexing an optical fiber, and has the characteristics of concision, convenience and low cost.
Description
Technical field
The present invention relates to the quantum light of a kind of quantum cryptography communications field and pulse generating device and the method for synchronizable optical generative process, relate in particular to a kind of device and method that produces high speed psec narrow-pulse laser.
Background technology
At present, the picosecond laser below 1GHz is comparatively ripe, in the world existing business-like product.The 10ps order of magnitude pulse laser operating frequency of Germany Advanced Laser Diode is 10MHz; The 20ps laser works frequency of Japan HAMAMATSU is 100MHz; The pulse laser operating frequency of Switzerland IDQ is 500MHz.The operating frequency of this device can reach 1GHz, and the I of pulse duration reaches the 50ps order of magnitude, and performance is far superior to existing product.
Quantum key dispatching system is nonclonability and the uncertainty based on quantum, and this makes quantum key dispatching system have security feature physically, thereby can accomplish the safe transmission of the information that classical communication system cannot accomplish.In quantum key dispatching system, need quantum light and synchronizable optical to realize quantum communications.Conventionally use single-photon source as quantum light, but that real single-photon source is realized technology is very difficult, can only replaces single-photon source with weak coherent light at present.Weak coherent light shortcoming realizes comparatively complicated, and high speed picosecond narrow-pulse laser reaches single photon level after decay, can carry out quantum operation and realize quantum communications.For the quantum key dispatching system of quantum light and the multiplexing optical fiber of synchronizable optical, synchronizable optical very easily produces and disturbs quantum light, this will ask the pulsewidth of synchronizable optical and time jitter the smaller the better, conventionally require pulsewidth at the 100ps order of magnitude, time jitter jitter is less than 100ps, and the I of the pulsewidth of high speed picosecond narrow-pulse laser reaches 50ps, and time jitter is less than 30ps, ensure largely the reliability of communication, thereby in quantum key dispatching system, played vital effect.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of quantum light of the quantum cryptography communications field and pulse generating device and method of synchronizable optical generative process of stable output, the quantum light of this quantum cryptography communications field and the pulse generating device of synchronizable optical generative process and method can be applicable to the quantum key dispatching system of quantum light and the multiplexing optical fiber of synchronizable optical, and laser ranging, fluorescence measurement, the fields such as process analysis procedure analysis, and having of the quantum light of this quantum cryptography communications field and the pulse generating device of synchronizable optical generative process and method is succinct, convenient, feature cheaply, especially be convenient in use the management of whole system quantum key dispatching system.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: produce the device of high speed psec narrow-pulse laser, it is characterized in that: comprise control module, signal driver module, constant current compensating module, temperature control modules and laser tube; Described laser tube carries TEC; Described control module is electrically connected with signal driver module, constant current compensating module, temperature control modules respectively; Described signal driver module, constant current compensating module, temperature control modules are electrically connected with laser tube respectively again; Described control module is changed into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube by signal driver module, the Output of laser of working under stationary temperature with drive laser; Described control module, by the working temperature of temperature control modules control laser tube, works laser under stationary temperature; Described control module is by the size of constant current compensating module control and compensation electric current, and making laser is constant current output.Further, described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Described fan-out chip is for being divided into four road signals by input Yi road triggering signal, and wherein export as synchronizing signal on a road, and two-way is exported to delay chip; Described delay chip is for arranging respectively different time delays and export to logic chip input two paths of signals; Described logic chip is for setting respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output; The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module is according to the working temperature value of predefined laser tube, and makes laser works in stationary temperature by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
Another technical scheme that the present invention takes is: the method that produces high speed psec narrow-pulse laser, it is characterized in that comprising the following steps: 1) output radio-frequency (RF) driving signal: control module output control signal is to signal driver module, signal driver module changes into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube according to control signal, the Output of laser of working under stationary temperature with drive laser, described laser tube carries TEC; 2) temperature control: in step 1), described control module, also by the working temperature of temperature control modules control laser tube, works laser under stationary temperature; 3) constant current compensation: in step 1), described control module is by the size of constant current compensating module control and compensation electric current, and making laser is constant current output.
Further, described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Described fan-out chip is divided into input Yi road triggering signal four road signals and exports to delay chip; Described delay chip arranges respectively different time delays and exports to logic chip input two paths of signals; Described logic chip is set respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output; The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module makes laser works in stationary temperature according to the working temperature value of predefined laser tube and by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
In the present invention, control module comprises single-chip microcomputer (MCU) and peripheral circuit and digital-to-analogue conversion DAC chip; Described fan-out chip is for being divided into four road signals by input Yi road triggering signal, wherein export as synchronizing signal on a road, and two-way is exported to delay chip, has both ensured that original input signal is not because load produces deformation, also ensure that the output of Liao Ge road is separate, be independent of each other; Constant current compensating circuit is used for exporting constant current with drive laser; Thermistor that temperature-control circuit can carry laser tube access bridge circuit, then its temperature control end access power amplifier is heated or freeze with the TEC that controls laser tube and carry, the temperature constant of guarantee laser is setting temperature value.
When the present invention starts working, can be in control module the working temperature of setting laser pipe, temperature-control circuit is controlled the TEC refrigeration in laser tube or is heated to reach and remain on by analog-digital chip DAC and sets temperature, laser is worked under stationary temperature, thereby ensure the stable of laser tube output.In signal driver module, the triggering signal of input, after fan-out chip, delay chip, the logic chip being made up of any chip and driving chip, produces required radio-frequency (RF) driving signal; Fan-out chip, delay chip, logic chip and driving chip adopt omnidistance direct-current coupling, the problem that while having solved AC coupled, laser output power changes with frequency change.Make drive signal amplitude and pulse keeping constant, ensured the stability of the electrical signal that is input to laser tube, the stability of Output of laser is played to decisive role.Constant current compensating circuit can, by the size of analog-digital chip DAC and feedback circuit control and compensation electric current, make it be output as constant current, has fundamentally ensured the stable of laser tube output.The present invention can be operated under pulse mode or continuous mode, the narrow-pulse laser of exportable 50ps～2ns under pulse mode; The stable continuous laser of exportable 1mW～5mW under continuous mode.Applied widely, simple to operate, easy to use.After the present invention builds successfully, test result is: operating frequency can reach 1GHz, and under pulse mode, output laser pulse width is low to moderate 50ps, and the laser output power under continuous mode is stable, can not vary with temperature and changes.Compared with existing laser, this device has the following advantages: volume is little, simple in structure, powerful, operating frequency is high, narrow, the stable output power of output pulse, simple to operate, have that USB, USART interface are convenient to be communicated, use flexibly etc. with the equipment such as PC.
The present invention adopts microprogram control unit, or be MCU, as main control unit, the object that reaches indirect control laser by control DAC etc., adopts more general DFB laser tube at present, select the driving chip of high-speed high-performance, for example MAX3942, and the high speed logic chip of generation kissing gate, for example in Fig. 2, model is SY55851, additional temperature control and weak current modulation, reach the object of controlling laser tube output.Stable output of the present invention in a word, output is disturbed little to quantum light, even do not disturb, can be applicable to the quantum key dispatching system of the multiplexing optical fiber of quantum light and synchronizable optical, and there is succinct, convenient, feature cheaply, be convenient to especially in use the management of whole system quantum key dispatching system.
Brief description of the drawings
Fig. 1 is the principle schematic of the embodiment of the present invention 1 and embodiment 2.
Fig. 2 is the circuit connection diagram of the embodiment of the present invention 1 and embodiment 2.
Embodiment
embodiment 1
Referring to Fig. 1 and Fig. 2, the device of this generation high speed psec narrow-pulse laser, comprises control module, signal driver module, constant current compensating module, temperature control modules and laser tube; Described laser tube carries TEC; Described control module is electrically connected with signal driver module, constant current compensating module, temperature control modules respectively; Described signal driver module, constant current compensating module, temperature control modules are electrically connected with laser tube respectively again; Described control module is changed into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube by signal driver module, the Output of laser of working under stationary temperature with drive laser; Described control module, by the working temperature of temperature control modules control laser tube, works laser under stationary temperature; Described control module, by the size of constant current compensating module control and compensation electric current, makes laser constant-current output.As preferred version, described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Described fan-out chip is for being divided into four road signals by input Yi road triggering signal, and wherein export as synchronizing signal on a road, and two-way is exported to delay chip; Described delay chip is for arranging respectively different time delays and export to logic chip input two paths of signals; Described logic chip is for setting respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output; The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module is according to the working temperature value of predefined laser tube, and makes laser works in stationary temperature by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
embodiment 2
Referring to Fig. 1 and Fig. 2, the method of this generation high speed psec narrow-pulse laser, comprise the following steps: 1) output radio-frequency (RF) driving signal: control module output control signal is to signal driver module, signal driver module changes into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube according to control signal, the Output of laser of working under stationary temperature with drive laser, described laser tube carries Tec; 2) temperature control: in step 1), described control module, also by the working temperature of temperature control modules control laser tube, works laser under stationary temperature; 3) constant current compensation: in step 1), described control module is by the size of constant current compensating module control and compensation electric current, and making laser is constant current output.As preferred version, described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Input Yi road triggering signal is divided into four road signals by described fan-out chip, and wherein export as synchronizing signal on a road, and two-way is exported to delay chip; Described delay chip arranges respectively different delay values to input two paths of signals and exports to logic chip; Described logic chip is set respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output;
The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module makes laser works in stationary temperature according to the working temperature value of predefined laser tube and by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
Claims (4)
1. a device that produces high speed psec narrow-pulse laser, is characterized in that: comprise control module, signal driver module, constant current compensating module, temperature control modules and laser tube; Described laser tube carries TEC; Described control module is electrically connected with signal driver module, constant current compensating module, temperature control modules respectively; Described signal driver module, constant current compensating module, temperature control modules are electrically connected with laser tube respectively again; Described control module is changed into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube by signal driver module, the Output of laser of working under stationary temperature with drive laser; Described control module, by the working temperature of temperature control modules control laser tube, works laser under stationary temperature; Described control module is by the size of constant current compensating module control and compensation electric current, and making laser is constant current output.
2. the device of generation high speed psec narrow-pulse laser according to claim 1, it is characterized in that: described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Described fan-out chip is for being divided into four road signals by input Yi road triggering signal, and wherein export as synchronizing signal on a road, and two-way is exported to delay chip; Described delay chip is for arranging respectively different delay values and export to logic chip input two paths of signals; Described logic chip is for setting respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output; The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module is according to the working temperature value of predefined laser tube, and makes laser works in stationary temperature by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
3. produce a method for high speed psec narrow-pulse laser, it is characterized in that comprising the following steps:
1) output radio-frequency (RF) driving signal: control module output control signal is to signal driver module, signal driver module changes into the triggering signal of input radio-frequency (RF) driving signal and radio-frequency (RF) driving signal is exported to laser tube according to control signal, the Output of laser of working under stationary temperature with drive laser, described in carry TEC;
2) temperature control: in step 1), described control module, also by the working temperature of temperature control modules control laser tube, works laser under stationary temperature;
3) constant current compensation: in step 1), described control module is by the size of constant current compensating module control and compensation electric current, and making laser is constant current output.
4. the method for generation high speed psec narrow-pulse laser according to claim 3, it is characterized in that: described signal driver module comprises fan-out chip, delay chip, logic chip and the driving chip of electrical connection successively, described fan-out chip, delay chip, logic chip and the direct-current coupling successively of driving chip; Input Yi road triggering signal is divided into four road signals by described fan-out chip, and wherein export as synchronizing signal on a road, and two-way is exported to delay chip; Described delay chip arranges respectively different time delays and exports to logic chip input two paths of signals; Described logic chip is set respectively logical operation to two paths of signals, then exports signal after logical operation to driving chip; Signal after logical operation is converted into radio-frequency (RF) driving signal to described driving chip and laser tube is issued in output; The analog-digital chip that described control module comprises MCU and is electrically connected with MCU; Described MCU is electrically connected with delay chip and driving chip respectively; Described analog-digital chip is electrically connected with driving chip, constant current compensating circuit and temperature-control circuit respectively; Described control module makes laser works in stationary temperature according to the working temperature value of predefined laser tube and by controlling the TEC refrigeration carrying in laser tube or heating; Described control module, by the size of constant current compensating circuit control and compensation electric current, makes laser tube be output as constant current.
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| CN109378705A (en) * | 2018-10-31 | 2019-02-22 | 深圳奥比中光科技有限公司 | Laser drive circuit and the device for using laser drive circuit |
| CN109412012A (en) * | 2018-10-18 | 2019-03-01 | 光梓信息科技（上海）有限公司 | Laser source generating circuit and equalization methods |
| CN109687846A (en) * | 2018-12-19 | 2019-04-26 | 南京国博电子有限公司 | A kind of Low phase noise broadband active single-chip integration broadband comb spectrum generator |
| CN109946550A (en) * | 2019-05-22 | 2019-06-28 | 北京中创为南京量子通信技术有限公司 | Collect the device and its test method that laser source, detector, optical device are tested |
| CN110391590A (en) * | 2019-07-23 | 2019-10-29 | 中国电子科技集团公司第十一研究所 | A kind of pulse laser driving power source system and its driving method |
| CN111459206A (en) * | 2020-04-09 | 2020-07-28 | 北华航天工业学院 | Temperature control stabilizing device and control method thereof |
| CN112636165A (en) * | 2020-12-29 | 2021-04-09 | 广东国腾量子科技有限公司 | Temperature control module of multichannel synchronous output laser light source |
| CN112636167A (en) * | 2020-12-29 | 2021-04-09 | 广东国腾量子科技有限公司 | Driving module of multipath synchronous output laser light source |
| CN112701562A (en) * | 2020-12-29 | 2021-04-23 | 广东国腾量子科技有限公司 | Multi-path synchronous output laser light source module |
| CN113904210A (en) * | 2021-10-09 | 2022-01-07 | 深钛智能科技(苏州)有限公司 | Programmable ultrafast pulse laser generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109412012A (en) * | 2018-10-18 | 2019-03-01 | 光梓信息科技（上海）有限公司 | Laser source generating circuit and equalization methods |
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| CN109946550A (en) * | 2019-05-22 | 2019-06-28 | 北京中创为南京量子通信技术有限公司 | Collect the device and its test method that laser source, detector, optical device are tested |
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| CN111459206A (en) * | 2020-04-09 | 2020-07-28 | 北华航天工业学院 | Temperature control stabilizing device and control method thereof |
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| CN112636167A (en) * | 2020-12-29 | 2021-04-09 | 广东国腾量子科技有限公司 | Driving module of multipath synchronous output laser light source |
| CN112701562A (en) * | 2020-12-29 | 2021-04-23 | 广东国腾量子科技有限公司 | Multi-path synchronous output laser light source module |
| CN112701562B (en) * | 2020-12-29 | 2023-01-17 | 广东国腾量子科技有限公司 | Multi-path synchronous output laser light source module |
| CN113904210A (en) * | 2021-10-09 | 2022-01-07 | 深钛智能科技(苏州)有限公司 | Programmable ultrafast pulse laser generator |
| CN113904210B (en) * | 2021-10-09 | 2023-03-24 | 深钛智能科技(苏州)有限公司 | Programmable ultrafast pulse laser generator |
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Address after: 241003 No. 12, Zhanghe Road, hi tech Zone, Anhui, Wuhu Applicant after: Anhui Asky Quantum Technology Co., Ltd. Address before: 241002 Anhui science and technology innovation public service center, Wuhu national hi tech Zone, Yijiang Applicant before: Anhui Asky Quantum Technology Co., Ltd. |
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