CN2859941Y - Multi-channel parallel data information optical fiber transmission device - Google Patents

Abstract

A multi-channel parallel data information optical fiber transmission device belonging to the technical field of digital communication, receives external parallel multi-channel low-speed data information through an information parallel-to-serial conversion module, converts it into multi-channel serial data information, and transmits it to a combiner. The multiplexer is multiplexed into one channel of serial data that can be transmitted through the optical fiber according to different timings. One channel of serial data output by the optical fiber is decomposed into multiple channels of serial data information by the splitter according to different timings, and the multiple channels of serial data information are restored to the original multiple channels of parallel low-speed data by the information serial-to-parallel conversion module and output. The utility model applies digital multiplexing technology to optical fiber information transmission, so that multi-channel low-speed data information can be transmitted through one optical fiber, which greatly saves development costs, increases the bandwidth of information transmission, improves the performance of information transmission, and improves transmission efficiency.

Description

Multi-channel parallel data information optical fiber transmission device

technical field

The utility model belongs to the technical field of digital communication, and relates to a device for transmitting multi-channel parallel data information by using an optical fiber.

Background technique

At present, wavelength division multiplexing technology is widely used in the technology of optical fiber as an information transmission medium. The information transmission device using wavelength division multiplexing technology is shown in Figure 1, including an optical transmitter module 1, a wavelength division multiplexer 2, and an optical fiber 3 , the wavelength division multiplexer 4, the optical receiving module 5, the optical signal output end of the optical transmitting module 1 is connected with the wavelength division multiplexer 2; the optical signal output end of the wavelength division multiplexer 2 is connected with one end of the optical fiber 3, and the The signals separated from each other modulate optical carriers of different wavelengths (or frequencies in the optical frequency region), each wavelength is assigned an optical channel, and the light is combined and input to the optical fiber 3 for transmission. The other end of the optical fiber 3 is connected to the optical carrier The demultiplexer 4 is connected, the wave demultiplexer 4 is connected with the optical receiving module 5, the wave demultiplexer 4 separates different wavelengths, and the optical channel of each wavelength is introduced into the corresponding optical receiving module 5 for recovery original signal. A wavelength division multiplexing/demultiplexing system that uses wavelength division multiplexing technology to transmit information requires an optical transmitter module and an optical receiver module for each corresponding wavelength. As the amount of data information increases, the system cost will inevitably increase.

Contents of the invention

The purpose of the utility model is to provide a multi-channel parallel data information optical fiber transmission device. The digital multiplexing technology is applied to the optical fiber information transmission, so that the multi-channel low-speed data information can be transmitted through one optical fiber, which solves the problems existing in the prior art. With the increase of information transmission bandwidth, the problem of system cost is increased.

The utility model includes a frequency divider 6, a timing generator 7, an information parallel-to-serial conversion module 8, a combiner 9, an optical transmitting module 10, an optical fiber 11, an optical receiving module 12, a clock extraction unit 13, a synchronization unit 14, and a branch Device 15, information serial to parallel conversion module 16. The input terminal of the frequency divider 6 is connected to the external clock, and the output terminal is connected to the input terminal of the timing generator 7; the timing signal output terminals of the timing generator 7 are respectively connected to the information parallel-serial conversion module 8 and the timing signal input terminals of the combiner 9; The serial data output end of the serial conversion module 8 is connected to the combiner 9, and the signal output end of the combiner 9 is sequentially connected to the optical transmitting module 10, the optical fiber 11, and the optical receiving module 12, and the output terminals of the optical receiving module 12 are respectively connected to the clock extraction unit 13. The input end of the splitter 15 is connected, the output end of the clock extraction unit 13 is connected to the input end of the synchronization unit 14, and the timing signal output end of the synchronization unit 14 is respectively connected to the splitter 15 and the information serial-to-parallel conversion module 16 timing signal input end, The serial signal output end of the splitter 15 is connected to the serial interface of the information serial-to-parallel conversion module 16 .

Working process of the present utility model: the frequency divider 6 receives the external clock signal, generates the base frequency signal and provides it to the timing generator 7, and the timing generator 7 generates the required timing signals of the information parallel-to-serial conversion module 8 and the combiner 9 and respectively Provided to both; the information parallel-to-serial conversion module 8 receives external parallel multi-channel low-speed data information, converts it into multiple serial data information and transmits it to the combiner 9 according to the timing provided by the timing generator 7, and the combiner 9 is timed The timing provided by the sequence generator 7 multiplexes multiple channels of serial data information into one channel of serial data. One channel of serial data output by the combiner 9 is converted into an optical signal through the optical transmitting module 10 , and the optical signal is transmitted to the optical receiving module 12 through the optical fiber 11 . The optical receiving module 12 converts the received optical signal into an electrical signal, that is, one channel of serial data information; the clock extraction unit 13 extracts the base frequency signal from this channel of serial data information to the synchronization unit 14, and the synchronization unit 14 generates a splitter 15. The timing signal required by the information serial-to-parallel conversion module 16 , which is the same as the timing used by the combiner 9 and the information parallel-to-serial conversion module 8 generated by the timing generator 7 . The one-way serial data output by the optical receiving module 12 is decomposed into multiple channels of serial data information through the splitter 15 according to the timing provided by the synchronization unit 14, and the multiple channels of serial data information are provided by the synchronization unit 14 through the information serial-to-parallel conversion module 16. The timing is restored to the original multi-channel parallel low-speed data and output.

Beneficial effects: the utility model replaces the wavelength division multiplexing technology with the electric multiplexing technology, so that multiple low-speed data information can be transmitted through one optical fiber, which greatly saves the development cost, increases the bandwidth of information transmission, and improves the transmission of information performance, improving transmission efficiency.

Description of drawings

Fig. 1 is a structural block diagram of the prior art. In the figure, 1 is an optical transmitting module, 2 is a wavelength division multiplexer, 3 is an optical fiber, 4 is a wavelength division multiplexer, and 5 is an optical receiving module.

Fig. 2 is a structural block diagram of the utility model, which is also the accompanying drawing of the abstract of the description. In the figure, 6 is a frequency divider, 7 is a timing generator, 8 is an information parallel-to-serial conversion module, 9 is a combiner, 10 is an optical transmitting module, 11 is an optical fiber, 12 is an optical receiving module, 13 is a clock extraction unit, 14 is a synchronization unit, and 15 is a branch device, 16 information serial to parallel conversion modules.

Detailed ways

The utility model frequency divider 6, timing generator 7, information parallel-to-serial conversion module 8, combiner 9, clock extraction unit 13, synchronization unit 14, splitter 15, information serial-to-parallel conversion module 16 are programmed in VHDL language It is implemented on a large-scale programmable logic device chip; the model of the large-scale programmable logic device chip is EPM7128SLC84-10. The optical transmitting module 10 adopts NM3320, the optical fiber 11 adopts standard single-mode optical fiber, and the optical receiving module 12 adopts NM5320.

Claims (2)

1, multidiameter delay data message fiber transmission device, comprise light emission module, optical fiber, Optical Receivers, it is characterized in that also comprising frequency divider (6), clock generator (7), information parallel serial conversion module (8), mixer (9), Clock Extraction unit (13), lock unit (14), splitter (15), bit string and modular converter (16); Frequency divider (6) input termination external clock, output links to each other with clock generator (7) input; Clock generator (7) clock signal output links to each other with information parallel serial conversion module (8), mixer (9) clock signal input respectively; Information parallel serial conversion module (8) serial data output links to each other with mixer (9), mixer (9) signal output part and light emission module (10), optical fiber (11), Optical Receivers (12) is linked in sequence, Optical Receivers (12) output respectively with Clock Extraction unit (13), splitter (15) input links to each other, Clock Extraction unit (13) output is connected with lock unit (14) input, lock unit (14) clock signal output respectively with splitter (15), bit string and modular converter (16) clock signal input links to each other, and splitter (15) serial signal output links to each other with the serial line interface of bit string and modular converter (16).

2, multidiameter delay data message fiber transmission device according to claim 1 is characterized in that frequency divider (6), clock generator (7), information parallel serial conversion module (8), mixer (9), Clock Extraction unit (13), lock unit (14), splitter (15), bit string and modular converter (16) are programmed on a slice scale programmable logic device chip with VHDL language to realize; It is EPM7128SLC84-10 that the scale programmable logic device chip adopts model, and light emission module (10) adopts NM3320, and optical fiber (11) adopts standard single-mode fiber, and Optical Receivers 12 adopts NM5320.

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