CN106773151B - Acousto-optic modulator driving system - Google Patents
Acousto-optic modulator driving system Download PDFInfo
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- CN106773151B CN106773151B CN201611103478.2A CN201611103478A CN106773151B CN 106773151 B CN106773151 B CN 106773151B CN 201611103478 A CN201611103478 A CN 201611103478A CN 106773151 B CN106773151 B CN 106773151B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/11—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
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Abstract
The invention provides acousto-optic modulator driving systems, which comprise a signal generating circuit, an adjustable attenuation circuit, a power amplification circuit and a radio frequency switch circuit, wherein the signal generating circuit is suitable for generating microwave signals with specific frequency, the adjustable attenuation circuit is connected with the signal generating circuit and is suitable for adjusting the attenuation of the power of the microwave signals generated by the signal generating circuit to obtain microwave signals with adjustable power within a fixed range, the power amplification circuit is connected with the adjustable attenuation circuit and is suitable for amplifying the microwave signals modulated by the adjustable attenuation circuit to obtain microwave signals with required power, and the radio frequency switch circuit is positioned between the adjustable attenuation circuit and the power amplification circuit and controls the microwave signal transmission between the adjustable attenuation circuit and the power amplification circuit through self on and off.
Description
Technical Field
The invention relates to driving systems, in particular to acousto-optic modulator driving systems.
Background
The main problem encountered in the atomic laser cooling and confinement technology is to cool atoms by using red detuned laser, and the magneto-optical trap reaction microscopic imaging spectrometer is , which is a device derived from the laser cooling and confinement technology.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide driving systems for an acousto-optic modulator, which are used to solve the problems of low isolation of driving signals, wide bandwidth, unstable frequency and power, low diffraction efficiency, and incapability of achieving fast switching of laser optical paths in the driving systems for acousto-optic modulators in the prior art.
To achieve the above and other related objects, the present invention provides acousto-optic modulator driving system, comprising:
a signal generating circuit adapted to generate a microwave signal of a specific frequency;
the adjustable attenuation circuit is connected with the signal generation circuit and is suitable for adjusting the attenuation of the power of the microwave signal generated by the signal generation circuit so as to obtain microwave signals with adjustable power within a certain range;
the power amplifying circuit is connected with the adjustable attenuation circuit and is suitable for amplifying the microwave signal modulated by the adjustable attenuation circuit to obtain a microwave signal with required power;
and the radio frequency switch circuit is positioned between the attenuator circuit and the power amplification circuit and controls the microwave signal transmission between the adjustable attenuator circuit and the power amplification circuit through the on-off of the radio frequency switch circuit.
preferable solution of the acousto-optic modulator driving system of the present invention, the signal generating circuit includes a voltage controlled oscillator adapted to generate microwave signals of corresponding frequencies according to an input control voltage.
As an preferable solutions of the driving system of the acousto-optic modulator of the present invention, the signal generating circuit further includes an adjustable voltage module, an input end of the adjustable voltage module is connected to the input voltage, and an output end of the adjustable voltage module is connected to the input end of the voltage controlled oscillator, and the adjustable voltage module is adapted to generate an adjustable control voltage according to the input voltage.
preferable schemes of the acousto-optic modulator driving system of the invention, the adjustable voltage module comprises a voltage stabilizing integrated circuit, a fixed resistor and a variable resistor;
the th fixed resistor is connected in series with the th variable resistor;
the voltage stabilizing integrated circuit comprises an input end, an output end and an adjusting terminal, wherein the input end of the voltage stabilizing integrated circuit is connected with input voltage, the output end of the voltage stabilizing integrated circuit is connected with the end of the fixed resistor, which is far away from the variable resistor, the adjusting terminal of the voltage stabilizing integrated circuit is connected with the other end of the fixed resistor and the variable resistor, reference voltage is provided between the output end of the voltage stabilizing integrated circuit and the adjusting terminal, and the reference voltage limits current flowing through the fixed resistor and the variable resistor.
As preferred solutions of the acousto-optic modulator driving system of the present invention, the voltage-stabilizing integrated circuit is an LM317 chip.
As preferred schemes of the acousto-optic modulator driving system, the adjustable attenuation circuit comprises an adjustable attenuator, the adjustable attenuator comprises a control end, a signal input end and a signal output end, the control end of the adjustable attenuator is connected with control current, the signal input end is connected with the output end of the signal generation circuit, and the adjustable attenuator is suitable for controlling the attenuation coefficient of the adjustable attenuator according to the input control current so as to adjust the power of the input microwave signal.
As preferable solutions of the driving system of the acousto-optic modulator of the present invention, the adjustable attenuation circuit further includes a adjustable current module, and the adjustable current module is connected to the control terminal of the adjustable attenuator and is adapted to generate an adjustable control current.
preferable schemes of the acousto-optic modulator driving system of the invention, the adjustable current module comprises a second variable resistor, a second fixed resistor, a third fixed resistor, a capacitor and a second capacitor;
the second variable resistor comprises a th fixed end, a second fixed end and a sliding end, wherein the th fixed end of the second variable resistor is connected with a voltage source, and the second fixed end of the second variable resistor is grounded;
the end of the th capacitor is connected with the sliding end of the second variable resistor, and the end is grounded;
the second fixed resistor, the third fixed resistor and the second capacitor are sequentially connected in series, an end of the second fixed resistor, which is far away from the third fixed resistor, is connected with a sliding end of the second variable resistor, a end of the second capacitor, which is far away from the third fixed resistor, is grounded, and a end of the second fixed resistor, which is connected with the third fixed resistor, is used as an output end of the adjustable current module to be connected with a control end of the adjustable attenuator.
As a preferred scheme of of the acousto-optic modulator driving system, the adjustable current module further comprises a st single-pole double-throw switch, the th single-pole double-throw switch comprises a st fixed end, a second fixed end and a movable end, the second variable resistor is connected with the second fixed resistor through the th single-pole double-throw switch, a sliding end of the second variable resistor is connected with a th fixed end of the th single-pole double-throw switch, and a end of the second fixed resistor, which is far away from the third fixed resistor, is connected with the movable end of the th single-pole double-throw switch.
As an preferable solution of the driving system of the aom of the present invention, the adjustable current module further includes a current adjusting unit, and the current adjusting unit is connected to the second fixed end of the single-pole double-throw switch and is adapted to adjust the output current of the adjustable current module.
As preferable schemes of the acousto-optic modulator driving system, the radio frequency switch circuit comprises a high-isolation switch, the high-isolation switch comprises a input end, a second input end, a third input end, a fourth input end, a output end and a second output end, the input end of the high-isolation switch is connected with the output end of the adjustable attenuation circuit, the second input end is connected with a control signal, the third input end is connected with a positive power supply, the fourth input end is connected with a negative power supply, and the high-isolation switch is suitable for realizing rapid switching of conduction and disconnection under the control of the control signal.
As preferable schemes of the acousto-optic modulator driving system, the radio frequency switch circuit further comprises a second single-pole double-throw switch, the second single-pole double-throw switch comprises a fixed end, a second fixed end and a movable end, the fixed end of the second single-pole double-throw switch is connected with a voltage source, the second fixed end is connected with a control signal input unit, and the movable end is connected with the second input end of the high-isolation switch.
As preferred versions of the acousto-optic modulator driving system of the present invention, the power amplification circuit includes a power amplifier.
preferable solutions of the acousto-optic modulator driving system of the present invention, the power amplifying circuit further includes a detection unit, and the detection unit is connected to the power amplifier.
preferable solutions of the acousto-optic modulator driving system of the present invention, the detection unit includes a switch and an indicator light, the switch is connected to the power amplifier, and the indicator light is connected to the switch.
As described above, the driving system of the acousto-optic modulator of the present invention has the advantages of fast switching of ns level of the output laser light path, high isolation, narrow bandwidth, stable frequency and power, continuous adjustability, high diffraction efficiency, etc., and the driving system of the acousto-optic modulator of the present invention has low cost.
Drawings
FIGS. 1 and 2 are block diagrams illustrating the driving system of the acousto-optic modulator according to the present invention.
FIG. 3 is a block diagram of the adjustable voltage module in the driving system of the acousto-optic modulator according to the present invention.
FIG. 4 is a block diagram of the adjustable current module in the driving system of the acousto-optic modulator according to the present invention.
FIGS. 5-6 are graphs showing the relationship between the power attenuation and the control current of the input signal of different frequencies after being processed by the adjustable attenuation circuit in the driving system of the acousto-optic modulator according to the present invention.
FIGS. 7-9 are frequency spectrums of the driving system of the acousto-optic modulator according to the present invention after processing the input signals with different frequencies.
Description of the element reference numerals
1 signal generating circuit
11 voltage controlled oscillator
12 adjustable voltage module
2 adjustable attenuation circuit
21 adjustable attenuator
22 adjustable current module
221 st st SPDT switch
3 radio frequency switch circuit
31 second single-pole double-throw switch
32 high isolation switch
4 power amplifying circuit
41 power amplifier
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that, referring to fig. 1 to 9, the drawings provided in the present embodiment are only schematic illustrations of the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in the actual implementation, the type, number and ratio of the components in the actual implementation may be random changes, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides types of acousto-optic modulator driving systems, which include a signal generating circuit 1, where the signal generating circuit 1 is adapted to generate microwave signals with specific frequencies, for example, in this embodiment, the signal generating circuit 1 is adapted to generate power with center frequencies of 80MHz, 110MHz and 250MHz, frequency is stable and has a continuously adjustable sinusoidal signal, the performance of the microwave signal directly determines the accuracy and stability of laser modulation by an acousto-optic modulator (AOM), an adjustable attenuation circuit 2, where the adjustable attenuation circuit 2 is connected to the signal generating circuit 1 and is adapted to adjust the attenuation of the power of the microwave signal generated by the signal generating circuit 1 to obtain a power adjustable microwave signal within a fixed range , a power amplifying circuit 4, where the power amplifying circuit 4 is connected to the adjustable attenuation circuit 2 and is adapted to amplify the microwave signal modulated by the adjustable attenuation circuit 2 to obtain a microwave signal with a required power, a radio frequency switching circuit 3, where the radio frequency switching circuit 3 is located between the adjustable attenuation circuit 2 and the power amplifying circuit 4, and the adjustable attenuation circuit 2 controls the adjustable attenuation circuit to turn off the microwave signal transmitting circuit 3, and when the adjustable attenuation circuit 2 is turned on and the microwave transmitting the microwave signal is turned on, the adjustable microwave signal transmitting circuit 3.
As an example, the signal generating circuit 1 comprises a voltage controlled oscillator 11, the voltage controlled oscillator 11 being adapted to generate microwave signals of respective frequencies depending on an input control voltage. The voltage-controlled oscillator 11 is an oscillating circuit for adjusting a frequency by controlling a voltage, and the oscillating frequency thereof varies with a dc voltage. The voltage-controlled oscillator 11 may be a ZOS-100+, ZOS-150+ or ZOS-300+ voltage-controlled oscillator, and the structures of the three types of voltage-controlled oscillators are well known to those skilled in the art and will not be described herein again. The voltage-controlled oscillator with the three signals has high integration level, the required external circuit has simple structure and excellent circuit performance, and the output radio frequency signal stably meets the requirements of the AOM driving circuit.
As an example, referring to fig. 2, the signal generating circuit 1 further includes an adjustable voltage module 12, an input terminal of the adjustable voltage module 12 is connected to the input voltage, and an output terminal of the adjustable voltage module 12 is connected to the input terminal of the voltage-controlled oscillator 11, and is adapted to generate an adjustable control voltage according to the input voltage.
Referring to fig. 3, the adjustable voltage module 12 includes a voltage regulator ic, a th fixed resistor R1And th variable resistor Rs1The th fixed resistor R1And said th variable resistor Rs1Are connected in series; the voltage stabilizing integrated circuit comprises an input end, an output end and an adjusting terminal; the voltage-stabilizing integrated circuitInput terminal of the circuit and input voltage ViThe output end of the voltage stabilizing integrated circuit is connected with the th fixed resistor R1A variable resistor R remote from the th resistors1 terminal of the voltage regulator integrated circuit, and the regulation terminal of the voltage regulator integrated circuit is connected with the fixed resistor R1Another terminal and the variable resistor Rs1Connected to provide reference voltage V between the output terminal and the regulation terminalREFSaid reference voltage VREFDefining a fixed resistance R flowing through said th1And the th variable resistor Rs1The current of (2). The control voltage V output by the adjustable voltage module 120Comprises the following steps:
wherein, IADJFor pin current, by adjusting the th variable resistor Rs1To control said control voltage V0。
By way of example, the voltage regulator integrated circuit is an LM317 chip. The adjustable voltage module 12 can provide an adjustable control voltage of 1-21V.
By way of example, with continuing reference to fig. 2, the adjustable attenuator circuit 2 includes an adjustable attenuator 21, the adjustable attenuator 21 includes a control terminal, a signal input terminal and a signal output terminal, the control terminal of the adjustable attenuator 21 is connected to control current, the signal input terminal is connected to the output terminal of the signal generating circuit 1, the adjustable attenuator 21 is adapted to control its attenuation coefficient according to the input control current, so as to adjust the power of the input microwave signal, specifically, the adjustable attenuator 21 may be an attenuator of ZMAS-1 type or ZMAS-3 type, and the attenuator realizes the output power adjustment by adjusting the magnitude of the input control current of the control terminal.
As an example, the adjustable attenuation circuit 2 further comprises an adjustable current module 22, wherein the adjustable current module 22 is connected to the control terminal of the adjustable attenuator 21 and is adapted to generate an adjustable control current.
As an example, referring to fig. 4, the adjustable current module 22 includes: second variable resistor Rs2A second fixed resistor R2A third fixed resistor R3 th capacitor C1And a second capacitor C2(ii) a The second variable resistor Rs2Comprises th fixed end, a second fixed end and a sliding end, and the second variable resistor Rs2The fixed end of is connected with a voltage source of (a positive voltage source for providing 5V voltage by is taken as an example in FIG. 4), and the second variable resistor Rs2Is grounded, the th capacitor C1 terminal and the second variable resistor Rs2Is connected with the sliding end of the first fixed resistor R, and the other end is grounded2The third fixed resistor R3And the second capacitor C2Are sequentially connected in series, and the second fixed resistor R2Away from the third fixed resistor R3 terminal and the second variable resistor Rs2Is connected to the sliding end of the second capacitor C2Away from the third fixed resistor R3 end of the first fixed resistor R is grounded, and the second fixed resistor R is connected with the ground2And the third fixed resistor R3The connected terminal is connected as the output terminal of the adjustable current module 22 to the control terminal of the adjustable attenuator 21.
As an example, the adjustable current module 22 further comprises a single-pole double-throw switch 221, the single-pole double-throw switch 221 comprises a fixed end, a second fixed end and a movable end, and the second variable resistor RS2And the second fixed resistor R2Is connected via the th SPDT 221, and the second variable resistor RS2Is connected with the fixed end of the single-pole double-throw switch 221, and the second fixed resistor RS2Away from the third fixed resistor R3And the end is connected with the movable end of the single-pole double-throw switch 221.
The adjustable current module 22 further includes a current adjusting unit (not shown), which is connected to the second fixed terminal of the spdt switch 221 and is adapted to adjust the output current of the adjustable current module 22. specifically, the current adjusting unit is connected to the second fixed terminal of the spdt switch 221 through a coaxial cable interface BNC, and the power attenuation and control current curves of the input signals with different frequencies processed by the adjustable attenuation circuit 2 are shown in fig. 5 and 6.
By way of example, the radio frequency switch circuit 3 includes a high-isolation switch 32, the high-isolation switch 32 includes an th input terminal, a second input terminal, a third input terminal, a fourth input terminal, a output terminal and a second output terminal, the th input terminal of the high-isolation switch 32 is connected to the output terminal of the adjustable attenuation circuit 2, the second input terminal 32 is connected to a control signal, the third input terminal is connected to a positive power supply (exemplified by a 5V positive power supply in fig. 2), the fourth input terminal is connected to a negative power supply (exemplified by a 5V negative power supply in fig. 2), and the high-isolation switch 32 is adapted to perform fast switching of on and off under the control of the control signal.
As an example, the radio frequency switch circuit 3 further includes a second single-pole double-throw switch 31, where the second single-pole double-throw switch 31 includes an th fixed end, a second fixed end, and a movable end, the th fixed end of the second single-pole double-throw switch 31 is connected to a voltage source, the second fixed end is connected to a control signal input unit, and the movable end is connected to a second input end of the high-isolation switch 32. specifically, the second fixed end of the second single-pole double-throw switch 31 is connected to a control signal input unit through a coaxial cable interface BNC. more specifically, the high-isolation switch 32 bits ZASW-2-50DR + type high-isolation switch has an output impedance of 20 Ω, and a control signal connected to a control end of the high-isolation switch is a TTL (transistor-transistor logic level) signal, and the high-isolation switch can realize fast switching of a laser optical path ns level.
As an example, the power amplification circuit 4 includes a power amplifier 41. Specifically, the power amplifier can be an AMPA-B-34 power amplifier with load impedance of 50 omega, the amplifier is high in integration level, free of peripheral elements, small in size, small in heating value, high in stability and provided with a heat dissipation back plate and saturated output power so as to prevent the acousto-optic modulator from being burnt out due to overhigh power of a driving signal, and low-voltage power supply is adopted.
As an example, the power amplification circuit 4 further comprises a detection unit (not shown) connected to the power amplifier 41.
As an example, the detection unit includes a switch (not shown) connected to the power amplifier 41 and an indicator lamp (not shown) connected to the switch. This is because the power amplifier 41 cannot be unloaded, otherwise the device will be burned out during operation, so it is necessary to add the switch and the indicator light to remind the operator to check the circuit during use, so as to prevent the power amplifier 41 from being burned out.
The method comprises the steps of requiring that the input radio frequency power of an acousto-optic modulator selected in the micro-imaging process of rubidium atoms in a magneto-optical trap is less than 2W (33 dBm), in the example, the power of a microwave signal output by a signal generating circuit 1 is 9dBm, and the gain of a power amplifier 41 selected in a power amplifying circuit 4 is 38dB when the power amplifier works normally, in order to meet the normal working requirement of the acousto-optic modulator, adding an adjustable attenuation circuit 2 into a driving system to attenuate the output signal by at least 14dB, meanwhile, because an alternating signal generated by the signal generating circuit 1 is weak, and the power amplifying circuit 4 is large, if the alternating signal and the adjustable attenuation circuit are directly connected, the problems of microwave signal output power drift, coupling noise and the like can be caused, so that the adjustable attenuation circuit 2 is added between the signal generating circuit 1 and the power amplifying circuit 4 to adjust, the power of the microwave signal is continuously adjustable, the mutual interference between the circuits is effectively isolated while the power of the microwave signal is continuously adjustable, the input and output impedance of the optical trap is matched with an omega, the requirement of the optical amplifier is ensured, the optical amplifier circuit to meet the requirement of cutting off the high-frequency of the optical signal power amplifier when the optical trap and the optical amplifier, the optical amplifier is required to cut off, the optical amplifier, the optical trap is required to cut off, the optical amplifier is required to cut off the optical amplifier, the optical amplifier is required to cut off the optical trap is required to cut off the optical amplifier, the optical amplifier is increased, the optical trap is increased, the optical amplifier is increased when the optical amplifier is required to cut off the optical trap is increased, the optical amplifier is required to cut off the optical amplifier, the optical amplifier is increased when the optical amplifier, the optical amplifier is increased, the optical amplifier is required to cut off, the optical trap is increased when the optical trap is increased, the optical amplifier 4, the optical amplifier is increased when the optical amplifier, the optical amplifier is increased when.
The frequency diagrams of the acousto-optic modulator driving system of the invention after 30dB attenuation is added to the driving circuit output signals with the center frequencies of 80MHz, 110MHz and 250MHz are shown in figures 7 to 9. From fig. 7 to fig. 9, it can be seen that the frequency of the signal outputted by the driving system of the acousto-optic modulator of the present invention is relatively pure, the bandwidth is relatively narrow, and both the power and the center frequency of the signal well satisfy the requirement of the acousto-optic modulator for normal operation. Meanwhile, when the frequency of the radio-frequency signal of the invention is 110MHz, when the radio-frequency switch 3 is turned on, the output signal power of the acousto-optic modulator driving system is 3.232dBm, and when the radio-frequency switch is turned off, the output signal is-77.017 dBm, and the signal isolation of the acousto-optic modulator driving system is 80.249dBm, so that the acousto-optic modulator driving system has higher signal isolation.
In summary, the acousto-optic modulator driving system of the invention includes a signal generating circuit adapted to generate a microwave signal with a specific frequency, an adjustable attenuation circuit connected to the signal generating circuit and adapted to adjust the attenuation of the power of the microwave signal generated by the signal generating circuit to obtain a microwave signal with adjustable power within , a power amplifying circuit connected to the adjustable attenuation circuit and adapted to amplify the microwave signal modulated by the adjustable attenuation circuit to obtain a microwave signal with required power, and a radio frequency switch circuit located between the attenuator circuit and the power amplifying circuit and controlling the microwave signal transmission between the adjustable attenuation circuit and the power amplifying circuit by turning on and off of the radio frequency switch circuit.
It will be appreciated by those skilled in the art that modifications and variations can be made to the disclosed embodiments without departing from the spirit and scope of the invention, and therefore, is equivalent to modifications and variations that would be apparent to those skilled in the art without departing from the spirit and scope of the invention as disclosed in the appended claims.
Claims (12)
1, A driving system of acousto-optic modulator, characterized in that said driving system of acousto-optic modulator includes:
a signal generating circuit adapted to generate a microwave signal of a specific frequency;
the adjustable attenuation circuit is connected with the signal generation circuit and is suitable for adjusting the attenuation of the power of the microwave signal generated by the signal generation circuit so as to obtain microwave signals with adjustable power within a certain range;
the power amplifying circuit is connected with the adjustable attenuation circuit and is suitable for amplifying the microwave signal modulated by the adjustable attenuation circuit to obtain a microwave signal with required power;
the radio frequency switch circuit is positioned between the adjustable attenuation circuit and the power amplification circuit and controls microwave signal transmission between the adjustable attenuation circuit and the power amplification circuit through self on-off;
the signal generating circuit comprises a voltage-controlled oscillator, and the voltage-controlled oscillator is suitable for generating microwave signals with corresponding frequencies according to input control voltage;
the signal generating circuit further comprises an adjustable voltage module, wherein the input end of the adjustable voltage module is connected with input voltage, the output end of the adjustable voltage module is connected with the input end of the voltage-controlled oscillator, and the adjustable voltage module is suitable for generating adjustable control voltage according to the input voltage;
the adjustable voltage module comprises a voltage stabilizing integrated circuit, an th fixed resistor and a th variable resistor;
the th fixed resistor is connected in series with the th variable resistor;
the voltage stabilizing integrated circuit comprises an input end, an output end and an adjusting terminal, wherein the input end of the voltage stabilizing integrated circuit is connected with input voltage, the output end of the voltage stabilizing integrated circuit is connected with the end of the fixed resistor, which is far away from the variable resistor, the adjusting terminal of the voltage stabilizing integrated circuit is connected with the other end of the fixed resistor and the variable resistor, reference voltage is provided between the output end of the voltage stabilizing integrated circuit and the adjusting terminal, and the reference voltage limits current flowing through the fixed resistor and the variable resistor.
2. The acousto-optic modulator driving system according to claim 1, wherein: the voltage stabilizing integrated circuit is an LM317 chip.
3. The acousto-optic modulator driver system according to of claims 1-2, wherein the adjustable attenuator circuit comprises an adjustable attenuator having a control terminal, a signal input terminal and a signal output terminal, the control terminal of the adjustable attenuator is connected to control current, the signal input terminal is connected to the output terminal of the signal generator circuit, and the adjustable attenuator is adapted to control its attenuation coefficient according to the input control current, so as to adjust the power of the input microwave signal.
4. The acousto-optic modulator driving system according to claim 3 characterized in that the adjustable attenuation circuit further comprises an adjustable current module connected to the control terminal of the adjustable attenuator adapted to generate an adjustable control current.
5. The acousto-optic modulator driving system according to claim 4, wherein the adjustable current module comprises a second variable resistor, a second fixed resistor, a third fixed resistor, an th capacitor and a second capacitor;
the second variable resistor comprises a th fixed end, a second fixed end and a sliding end, wherein the th fixed end of the second variable resistor is connected with a voltage source, and the second fixed end of the second variable resistor is grounded;
the end of the th capacitor is connected with the sliding end of the second variable resistor, and the end is grounded;
the second fixed resistor, the third fixed resistor and the second capacitor are sequentially connected in series, an end of the second fixed resistor, which is far away from the third fixed resistor, is connected with a sliding end of the second variable resistor, a end of the second capacitor, which is far away from the third fixed resistor, is grounded, and a end of the second fixed resistor, which is connected with the third fixed resistor, is used as an output end of the adjustable current module to be connected with a control end of the adjustable attenuator.
6. The driving system of claim 5, wherein the adjustable current module further comprises a single-pole double-throw switch, the single-pole double-throw switch comprises a fixed end, a second fixed end and a movable end, the second variable resistor is connected with the second fixed resistor through the single-pole double-throw switch, a sliding end of the second variable resistor is connected with a fixed end of the single-pole double-throw switch, and a end of the second fixed resistor, which is far away from the third fixed resistor, is connected with the movable end of the single-pole double-throw switch.
7. The acousto-optic modulator driving system according to claim 6, wherein the adjustable current module further comprises current adjusting unit connected to the second fixed terminal of the SPDT switch for adjusting the output current of the adjustable current module.
8. The driving system of claim 1, wherein the RF switch circuit comprises a high isolation switch, the high isolation switch comprises an th input terminal, a second input terminal, a third input terminal, a fourth input terminal, a th output terminal and a second output terminal, the th input terminal of the high isolation switch is connected to the output terminal of the adjustable attenuation circuit, the second input terminal is connected to the control signal, the third input terminal is connected to the positive power supply, the fourth input terminal is connected to the negative power supply, and the high isolation switch is adapted to perform fast switching between on and off under the control of the control signal.
9. The acousto-optic modulator driving system according to claim 8, wherein the RF switch circuit further comprises a second SPDT switch including th fixed end, a second fixed end and a movable end, wherein the th fixed end of the second SPDT switch is connected to voltage source, the second fixed end is connected to control signal input unit, and the movable end is connected to the second input end of the high isolation switch.
10. The acousto-optic modulator driving system according to claim 1, wherein: the power amplification circuit includes a power amplifier.
11. The acousto-optic modulator driving system according to claim 10, wherein: the power amplification circuit further comprises a detection unit, and the detection unit is connected with the power amplifier.
12. The acousto-optic modulator driving system according to claim 11, wherein: the detection unit comprises a switch and an indicator light, the switch is connected with the power amplifier, and the indicator light is connected with the switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611103478.2A CN106773151B (en) | 2016-12-05 | 2016-12-05 | Acousto-optic modulator driving system |
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| CN201611103478.2A CN106773151B (en) | 2016-12-05 | 2016-12-05 | Acousto-optic modulator driving system |
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| CN107357350B (en) * | 2017-06-27 | 2018-10-12 | 浙江大学 | Improve the acousto-optic modulator drive system of acousto-optic modulator fuel factor |
| CN109755852A (en) * | 2017-11-07 | 2019-05-14 | 核工业理化工程研究院 | Based on the controllable Solid State Laser output-controlling device of multimode and control method |
| CN109067384A (en) * | 2018-09-14 | 2018-12-21 | 北京遥感设备研究所 | A kind of isolation rearrangeable switch |
| CN112230450B (en) * | 2020-11-06 | 2024-04-23 | 苏州贝林激光有限公司 | AOM control system and control method thereof |
| CN114578676B (en) * | 2022-03-16 | 2023-09-08 | 中国科学院上海天文台 | Hydrogen atomic clock atomic relaxation time measurement system |
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| CN103296568B (en) * | 2013-06-09 | 2015-06-17 | 北京信息科技大学 | Pulse fiber laser acoustic optical modulator driving power source |
| CN103746285B (en) * | 2013-12-27 | 2016-09-21 | 中国科学院国家授时中心 | A kind of high stability laser frequency scanning means based on acousto-optic modulator |
| CN204615147U (en) * | 2015-05-21 | 2015-09-02 | 中国科学院武汉物理与数学研究所 | The acousto-optic modulator drive source that a kind of frequency-adjustable power output is constant |
| CN105094014B (en) * | 2015-07-30 | 2018-02-13 | 中国科学院电子学研究所 | High-speed parallel D/A clock synchronization apparatus |
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