CN104486001A - Optical transmitter based on second-order high-pass filter circuit - Google Patents
Optical transmitter based on second-order high-pass filter circuit Download PDFInfo
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- CN104486001A CN104486001A CN201410714288.9A CN201410714288A CN104486001A CN 104486001 A CN104486001 A CN 104486001A CN 201410714288 A CN201410714288 A CN 201410714288A CN 104486001 A CN104486001 A CN 104486001A
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Abstract
The invention discloses an optical transmitter based on a second-order high-pass filter circuit. The optical transmitter comprises a matched buffer circuit, a filter circuit, a low-noise amplifier, an amplifying circuit, an attenuator, a laser transmitting module, an isolator and a low-noise linear voltage stabilizing power supply, wherein the matched buffer circuit, the filter circuit, the low-noise amplifier, the amplifying circuit, the attenuator, the laser transmitting module and the isolator are sequentially connected, and the low-noise linear voltage stabilizing power supply is also respectively connected with the matched buffer circuit, the filter circuit, the low-noise amplifier and the amplifying circuit. The optical transmitter has the advantages that the size is small, higher coupling efficiency is realized between optical fibers, the optical intensity modulation can be carried out, the reliability is high, the work service life is long, the work stability performance is good, two stages of signal amplification are adopted, the transmitted optical power is high enough, and the transmission for a longer distance can be realized.
Description
Technical field
The invention discloses a kind of optical sender based on second order high-pass filtering circuit, relate to signal processing technology field.
Background technology
The new science and technology of of growing up for 20 end of the centurys with light wave transmitting television signals and data message, its appearance makes world information industry obtain develop rapidly, present optical fiber transmission technique is just to exceed the speed development of people's imagination, its light transmission speed than 10 years before improve 100 times, estimate also will improve about 100 times in development from now on.Along with the development of optical fiber transmission technique, area of light can be carried out multiplexing, demultiplexing, routing, exchange, and network can utilize the enormous bandwidth resource of optical fiber, increases the capacity of network, realizes " transparent " transmission of multiple business.
Optical transmission system is primarily of optical sender, optical receiver, optical branching device and fiber optic cables and other device composition.
Optical transport carries out with light signal form the technology transmitted between transmit leg and recipient.The course of work of optical transport TV signal is at optical sender, carry out between optical fiber and optical receiver three; At the optical sender of central machine room, the RF TV signal of input is transformed into light signal, it is by electrical/optical converter (Electric-Optical Transducer, E/O) complete, optical signals Optical Fiber Transmission guiding receiving equipment (optical receiver) be transformed into receives, and optical receiver is reduced into the signal of telecommunication the converting optical signals obtained from optical fiber.Therefore the base reason of optical transmission signal is exactly the overall process of electrical/optical and light/electricity conversion, also referred to as optical link.Current optical transport mode adopts light intensity modulation.The consistent so-called coherent light of phase place is sent as adopted the light hair device part of laser, therefore take and make the modulation system that changes of luminous intensity entirety, which utilizes Output optical power and correspond to the change of electrical/optical converter current input signal and the characteristic of linear change.At light/electric transducer (Optical-Electric Transducer, O/E) in, export the electric current being proportional to input optical signal intensity, the output current wave of light/electric transducer is thus similar to electrical/optical converter input current waveform, reaches the object of Signal transmissions.
The patent No. is 201210204168.5, and patent name is optical sender, although this patent indicates the Problems existing of prior art, carried out designing solving from inside configuration, effect is not fairly obvious, and the stability of circuit also needs to be investigated.
The patent No. is 201220721995.7, and patent name is optical sender, and this patent is just improved from external structure, does not propose the method solving internal problem.
Summary of the invention
Technical problem to be solved by this invention is: for the defect of prior art, a kind of optical sender based on second order high-pass filtering circuit is provided, volume of the present invention is little, and has higher coupling efficiency between optical fiber, can carry out the modulation of luminous intensity, reliability is high, long working life, working stability performance is good, adopts two-stage signal to amplify, the luminous power of launching is enough high, can transmit larger distance.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of optical sender based on second order high-pass filtering circuit, comprise coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator, low noise linear stabilized power supply, described coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator are connected successively, and described low noise linear stabilized power supply is also connected with coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit respectively;
Signal enters after filter circuit carries out filtering noise through overmatching buffer circuit, enter low noise amplifier and carry out signal amplification, enter amplifying circuit through low noise amplifier amplifying signal again to amplify, signal is made to obtain enough power, obtain secondary amplifying signal to enter attenuator and decay, signal amplitude is decayed to certain scope, then enters laser emitting module and carry out signal transmitting, and isolated by isolator and load;
Described low noise linear stabilized power supply provides stable power supply for coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit.
Described filter circuit is second order high-pass filtering circuit, comprise amplifier, first to fourth resistance, first and second electric capacity, wherein, the input of second order high-pass filtering circuit is through one end of the first electric capacity respectively with the second electric capacity, one end of 3rd resistance is connected, one end of the other end the respectively with four resistance of the second electric capacity, the positive input terminal of amplifier is connected, the other end ground connection of the 4th resistance, one end of negative input end respectively with the first resistance of amplifier, one end of second resistance is connected, the other end ground connection of the first resistance, the other end of output respectively with the second resistance of amplifier, the other end of the 3rd resistance is connected and as the output of second order high-pass filtering circuit.
As further scheme of the present invention, the chip model of described low noise amplifier is ATF-54143.
As further scheme of the present invention, the model of described attenuator is HMC274.
As further scheme of the present invention, described low noise linear stabilized power supply adopts low noise LDO linear voltage regulator.
As further scheme of the present invention, described laser emitting module comprises encoding control circuit, drive circuit, control circuit, fiber amplifier circuit, described encoding control circuit, drive circuit, fiber amplifier circuit are connected successively, and described control circuit is connected with fiber amplifier circuit with drive circuit respectively.
The present invention adopts above technical scheme compared with prior art, there is following technique effect: volume of the present invention is little, and there is higher coupling efficiency between optical fiber, can carry out the modulation of luminous intensity, reliability is high, long working life, working stability performance is good, employing two-stage signal is amplified, and the luminous power of transmitting is enough high, can transmit larger distance.
Accompanying drawing explanation
Fig. 1 is system configuration schematic diagram of the present invention.
Fig. 2 is in the present invention, the physical circuit figure of filter circuit,
Wherein: R1 to R4 is respectively first to fourth resistance, C1 and C2 is respectively first, second electric capacity, and U1 is amplifier.
Embodiment
Be described below in detail embodiments of the present invention, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are understandable that, the correlation module related in the present invention and the function of realization thereof are the devices of hardware after improvement and formation thereof, device or system carry computer software programs conventional in prior art or pertinent protocols just can realize, and are not improve computer software programs of the prior art or pertinent protocols.Such as, the computer hardware system after improvement still can realize the specific function of this hardware system by loading existing operation system of software.Therefore, be understandable that, innovation of the present invention is the improvement of hardware module in prior art and connects syntagmatic, but not be only in hardware module for realizing the improvement of software or the agreement of carrying about function.
Those skilled in the art of the present technique are understandable that, the correlation module mentioned in the present invention is the one or more hardware device for performing in step in operation, method, flow process described in the application, measure, scheme.Described hardware device for required object and specialized designs and manufacture, or also can adopt the known device in all-purpose computer or other known hardware devices.Described all-purpose computer activates or reconstructs with having storage procedure Selection within it.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in specification of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Figure of the present invention as shown in Figure 1, a kind of optical sender based on second order high-pass filtering circuit, comprise coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator, low noise linear stabilized power supply, described coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator are connected successively, and described low noise linear stabilized power supply is also connected with coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit respectively;
Signal enters after filter circuit carries out filtering noise through overmatching buffer circuit, enter low noise amplifier and carry out signal amplification, enter amplifying circuit through low noise amplifier amplifying signal again to amplify, signal is made to obtain enough power, obtain secondary amplifying signal to enter attenuator and decay, signal amplitude is decayed to certain scope, then enters laser emitting module and carry out signal transmitting, and isolated by isolator and load;
Described low noise linear stabilized power supply provides stable power supply for coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit.
In the present invention, the physical circuit figure of filter circuit as shown in Figure 2, described filter circuit is second order high-pass filtering circuit, comprise amplifier, first to fourth resistance, first and second electric capacity, wherein, the input of second order high-pass filtering circuit is through one end of the first electric capacity respectively with the second electric capacity, one end of 3rd resistance is connected, one end of the other end the respectively with four resistance of the second electric capacity, the positive input terminal of amplifier is connected, the other end ground connection of the 4th resistance, one end of negative input end respectively with the first resistance of amplifier, one end of second resistance is connected, the other end ground connection of the first resistance, the other end of output respectively with the second resistance of amplifier, the other end of the 3rd resistance is connected and as the output of second order high-pass filtering circuit.
As further scheme of the present invention, the chip model of described low noise amplifier is ATF-54143, and the noise factor of this chip is smaller, and internal circuit design is accurate, can not bring extra noise, cause the crosstalk of signal to circuit.
As further scheme of the present invention, the model of described attenuator is HMC274, and the operating frequency of this attenuator is more stable, and attenuation accuracy is higher.
As further scheme of the present invention, described low noise linear stabilized power supply adopts low noise LDO linear voltage regulator, and the cost of low noise LDO linear voltage regulator is very low, and stability is higher, ultralow output voltage noise, is applicable to using in the circuit of noise-sensitive very much.
As further scheme of the present invention, described laser emitting module comprises encoding control circuit, drive circuit, control circuit, fiber amplifier circuit, described encoding control circuit, drive circuit, fiber amplifier circuit are connected successively, and described control circuit is connected with fiber amplifier circuit with drive circuit respectively.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from present inventive concept.The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection range all still belonging to technical solution of the present invention.
Claims (5)
1. the optical sender based on second order high-pass filtering circuit, it is characterized in that: comprise coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator, low noise linear stabilized power supply, described coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit, attenuator, laser emitting module, isolator are connected successively, and described low noise linear stabilized power supply is also connected with coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit respectively;
Signal enters filter circuit through overmatching buffer circuit and carries out filtering noise, enter low noise amplifier after treatment and carry out signal amplification, signal after amplification enters amplifying circuit and again amplifies, signal is made to obtain enough power, enter attenuator through secondary amplifying signal to decay, the amplitude of signal through overdamping laggard enter laser emitting module carry out signal transmitting, and to be isolated by isolator and load;
Described low noise linear stabilized power supply is coupling buffer circuit, filter circuit, low noise amplifier, amplifying circuit are powered;
Described filter circuit is second order high-pass filtering circuit, comprise amplifier, first to fourth resistance, first and second electric capacity, wherein, the input of second order high-pass filtering circuit is through one end of the first electric capacity respectively with the second electric capacity, one end of 3rd resistance is connected, one end of the other end the respectively with four resistance of the second electric capacity, the positive input terminal of amplifier is connected, the other end ground connection of the 4th resistance, one end of negative input end respectively with the first resistance of amplifier, one end of second resistance is connected, the other end ground connection of the first resistance, the other end of output respectively with the second resistance of amplifier, the other end of the 3rd resistance is connected and as the output of second order high-pass filtering circuit.
2. a kind of optical sender based on second order high-pass filtering circuit according to claim 1, is characterized in that: the model of described low noise amplifier is ATF-54143.
3. a kind of optical sender based on second order high-pass filtering circuit according to claim 1, is characterized in that: the model of described attenuator is HMC274.
4. a kind of optical sender based on second order high-pass filtering circuit according to claim 1, is characterized in that: described low noise linear stabilized power supply adopts low noise LDO linear voltage regulator.
5. a kind of optical sender based on second order high-pass filtering circuit according to claim 1, it is characterized in that: described laser emitting module comprises encoding control circuit, drive circuit, control circuit, fiber amplifier circuit, described encoding control circuit, drive circuit, fiber amplifier circuit are connected successively, and described control circuit is connected with fiber amplifier circuit with drive circuit respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410714288.9A CN104486001A (en) | 2014-12-02 | 2014-12-02 | Optical transmitter based on second-order high-pass filter circuit |
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| CN201410714288.9A CN104486001A (en) | 2014-12-02 | 2014-12-02 | Optical transmitter based on second-order high-pass filter circuit |
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Application publication date: 20150401 |