CN-116248195-B - Optical pulse processing system and method

CN116248195BCN 116248195 BCN116248195 BCN 116248195BCN-116248195-B

Abstract

The application discloses an optical pulse processing system and method, wherein the system comprises a reference optical pulse source for generating an optical pulse sequence, an intensity modulator connected in series with the reference optical pulse source, a high-speed signal acquisition device connected in series with the intensity modulator, and a high-speed signal acquisition device connected in series with the intensity modulator, wherein the intensity modulator is used for fitting a low-speed optical pulse signal with the optical pulse sequence after receiving a low-speed optical pulse signal carrying data information to be processed to acquire a standard optical pulse signal, and then the high-speed signal acquisition device is used for carrying out resonance operation on the standard optical pulse signal, and then the other intensity modulator is used for selecting a high-speed optical pulse signal carrying complete information from the high-speed signals output by the high-speed signal acquisition device, so that the high-speed optical pulse signal is acquired. The application inputs the optical pulse signal carrying the data information to be processed into the high-speed signal acquisition device to carry out resonance operation, and then selects the high-speed optical pulse signal carrying the complete information by the corresponding intensity modulator, thereby realizing the change of the modulation speed of the optical pulse signal.

Inventors

YIN ZHIJUN
LV XINJIE
YE ZHILIN
XU QICHENG

Assignees

南京南智先进光电集成技术研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20230217

Claims (13)

1. An optical pulse processing system, comprising: A first reference light pulse source (100) for generating a periodic sequence of light pulses; A first intensity modulator (101) connected in series with the first reference optical pulse source (100) and used for receiving the optical pulse sequence and a low-speed optical pulse signal carrying data information to be processed, and modulating the optical pulse sequence through the low-speed optical pulse signal to obtain a standard optical pulse signal carrying the data information to be processed, wherein the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the period time of the optical pulse sequence; a high-speed signal acquisition device (105) connected in series with the first intensity modulator (101) and configured to acquire a high-speed signal corresponding to the standard optical pulse signal by performing a resonance operation on the standard optical pulse signal; a second intensity modulator (104) connected in series with the high-speed signal acquisition device (105) for selecting a high-speed optical pulse signal carrying complete information from the high-speed signals output by the high-speed signal acquisition device (105); Further comprises: A third optical resonant cavity (203) for receiving a high-speed optical pulse signal carrying data information to be processed and circulating each optical pulse of the high-speed optical pulse signal; A second reference light pulse source (200) for generating a periodic second light pulse sequence; A second delay modulator (202) connected in series with the second reference optical pulse source (200) and configured to perform delay processing on each optical pulse in the second optical pulse sequence to obtain a second delay signal, where delay time sequentially increases with equal difference, delay time difference of adjacent optical pulses is equal, and sum of time interval between adjacent optical pulse centers in the high-speed optical pulse signal and time interval between adjacent optical pulse centers in the second delay signal is equal to sum of time of optical pulses in the third optical resonant cavity (203) for one cycle; and the first optical switch (204) is connected with the third optical resonant cavity (203) and the second delay modulator (202) at the same time and is used for screening a part of the high-speed optical pulse signal output by the third optical resonant cavity (203) and synchronous with the second delay signal to form a low-speed optical pulse signal.
2. An optical pulse processing system as defined in claim 1, wherein, The high-speed signal acquisition device (105) comprises a first delay modulator (102) and a first optical resonant cavity (103); the first delay modulator (102) is connected in series with the first intensity modulator (101) and is used for sequentially carrying out delay processing on each optical pulse in the standard optical pulse signal, the delay time sequentially increases in an equal difference, and the difference between the delay time of adjacent optical pulses is equal to obtain a first delay signal; The first optical resonant cavity (103) is used for sequentially acquiring each optical pulse of the first delay signal, carrying out resonance circulation on the optical pulses entering the first optical resonant cavity (103) at different moments to acquire a superposition signal, wherein the difference between the time of the optical pulse in the first optical resonant cavity (103) circulating for one circle and the time interval of the adjacent optical pulse center of the first delay signal is smaller than the period time of an optical pulse sequence and larger than the pulse width of each optical pulse in the optical pulse sequence, and the superposition signal is a high-speed signal corresponding to the standard optical pulse signal; Or the high-speed signal acquisition device (105) comprises a second optical resonant cavity; The second optical resonant cavity is used for carrying out resonance circulation on the standard optical pulse signal after receiving the standard optical pulse signal and outputting an optical pulse signal after resonance circulation, wherein the optical pulse signal after resonance circulation is a high-speed signal corresponding to the standard optical pulse signal, the time of the standard optical pulse signal in the second optical resonant cavity in a circle is smaller than the time interval of the adjacent optical pulse centers of the standard optical pulse signal, and the difference between the time of the standard optical pulse signal in the second optical resonant cavity in a circle and the time interval of the adjacent optical pulse centers of the standard optical pulse signal is smaller than the cycle time of the optical pulse sequence and is larger than the pulse width of each optical pulse in the optical pulse sequence.
3. The light pulse processing system according to claim 2, wherein the first optical resonator (103) is connected in series with the first delay modulator (102) or the first delay modulator (102) is located inside the first optical resonator (103).
4. The light pulse processing system of claim 1, further comprising: The fourth optical resonant cavity is used for receiving a high-speed optical pulse signal carrying data information to be processed and circulating each optical pulse of the high-speed optical pulse signal; a fourth reference light pulse source for generating a periodic fourth light pulse train; And the second optical switch is respectively connected with the fourth optical resonant cavity and the fourth reference optical pulse source and is used for screening a synchronous part of the high-speed optical pulse signal output by the fourth optical resonant cavity and the fourth optical pulse sequence to form a low-speed optical pulse signal, wherein the sum of the time interval of the adjacent pulse centers in the high-speed optical pulse signal and the time of the optical pulse in the fourth optical resonant cavity for one circle is equal to the time interval of the adjacent optical pulse centers in the fourth optical pulse sequence.
5. The optical pulse processing system according to claim 1, wherein the first optical switch (204) is an optical switch using a frequency multiplication or a frequency combination.
6. An optical pulse processing system as defined in claim 2, wherein a gain medium is disposed in the optical resonator of the optical pulse processing system to compensate for the intensity of the optical pulse.
7. The optical pulse processing system according to claim 2, wherein an intensity attenuation modulator is further connected in series between the first delay modulator (102) and the first optical resonant cavity (103), and the intensity attenuation modulator sequentially attenuates the optical pulses in the first delay signal, and the attenuated intensities sequentially decrease in equal ratio.
8. An optical pulse processing system according to claim 1, characterized in that a third intensity modulator (201) is arranged between the second reference optical pulse source (200) and the second delay modulator (202), the third intensity modulator (201) being arranged to compensate the optical pulse intensity of the high-speed optical pulse signal output in the third optical resonator (203).
9. An optical pulse processing system according to any one of claims 2 to 4, wherein the optical resonator in the optical pulse processing system employs dispersion compensation techniques.
10. A method of optical pulse processing, characterized by being applied to the optical pulse processing system according to any one of claims 1 to 8, comprising: A first reference light pulse source (100) in the light pulse processing system transmits a periodic light pulse sequence to a first intensity modulator (101) in the light pulse processing system, and simultaneously inputs a low-speed light pulse signal carrying data information to be processed into the first intensity modulator (101); The first intensity modulator (101) modulates the optical pulse sequence to obtain a standard optical pulse signal carrying data information to be processed, wherein the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the cycle time of the optical pulse sequence; The first intensity modulator (101) transmits the standard optical pulse signal to the high-speed signal acquisition device (105), and the high-speed signal acquisition device (105) acquires a high-speed signal corresponding to the standard optical pulse signal by performing resonance operation on the standard optical pulse signal; The high-speed signal acquisition device (105) transmits the high-speed signal to a second intensity modulator (104), and the second intensity modulator (104) selects a high-speed optical pulse signal carrying complete information from the high-speed signals output by the high-speed signal acquisition device (105).
11. The method for processing light pulses according to claim 10, wherein, The high-speed signal acquisition device (105) comprises a first delay modulator (102) and a first optical resonant cavity (103); The high-speed signal acquisition device (105) acquires a high-speed signal corresponding to the standard optical pulse signal, and comprises: After the first delay modulator (102) acquires the standard optical pulse signals, sequentially carrying out delay processing on each optical pulse in the standard optical pulse signals, wherein the delay time sequentially increases with equal difference, and the difference between the delay time of adjacent optical pulses is equal to acquire first delay signals; The first delay modulator (102) sequentially couples the optical pulses of the first delay signal into the first optical resonant cavity (103), the first optical resonant cavity (103) performs resonance circulation to obtain a superposition signal, the difference between the time of the optical pulses in the first optical resonant cavity (103) circulating for one circle and the time interval of the adjacent optical pulse centers of the first delay signal is smaller than the period time of an optical pulse sequence and larger than the width of each optical pulse in the optical pulse sequence, and the superposition signal is a high-speed signal corresponding to the standard optical pulse signal; Or the high-speed signal acquisition device (105) comprises a second optical resonant cavity; The high-speed signal acquisition device (105) acquires a high-speed signal corresponding to the standard optical pulse signal, and comprises: The second optical resonant cavity performs resonance circulation on the standard optical pulse signal after the standard optical pulse signal is acquired, and outputs an optical pulse signal after the resonance circulation, wherein the optical pulse signal after the resonance circulation is a high-speed signal corresponding to the standard optical pulse signal, the time of the standard optical pulse signal in the second optical resonant cavity in a circle is smaller than the time interval of the adjacent optical pulse center of the standard optical pulse signal, and the difference between the time of the standard optical pulse signal in the second optical resonant cavity in a circle and the time interval of the adjacent optical pulse center of the standard optical pulse signal is smaller than the period time of the optical pulse sequence and is larger than the pulse width of each optical pulse in the optical pulse sequence.
12. The method of light pulse processing according to claim 10, further comprising: A third optical resonant cavity (203) in the optical pulse processing system receives a high-speed optical pulse signal carrying data information to be processed and circulates each optical pulse of the high-speed optical pulse signal; a second reference light pulse source (200) in the light pulse processing system generates a periodic second light pulse train and transmits the second light pulse train to a second delay modulator (202); The second delay modulator (202) in the optical pulse processing system sequentially delays each optical pulse of the optical pulse sequence to obtain a second delay signal, wherein the delay time sequentially increases in equal difference, the delay time difference of adjacent optical pulses is equal, and the sum of the time interval of the adjacent optical pulse centers in the high-speed optical pulse signal and the time interval of the optical pulse circulating in the third optical resonant cavity (203) for one circle is equal to the time interval of the adjacent optical pulse centers in the second delay signal; the high-speed optical pulse signals in the third optical resonant cavity (203) are coupled and output to the first optical switch (204), the second delay signals are input into the first optical switch (204), and the first optical switch (204) screens the synchronous part of the high-speed optical pulse signals coupled and output by the third optical resonant cavity (203) and the second delay signals to form the low-speed optical pulse signals.
13. The method of light pulse processing according to claim 10, further comprising: a fourth reference light pulse source in the light pulse processing system generates a periodic fourth light pulse sequence; after a fourth optical resonant cavity in the optical pulse processing system acquires a high-speed optical pulse signal carrying data information to be processed, the fourth optical resonant cavity circulates each optical pulse of the high-speed optical pulse signal in the fourth optical resonant cavity; The high-speed optical pulse signals in the fourth optical resonant cavity are coupled and input to the second optical switch, the fourth optical pulse sequence is input to the second optical switch, the second optical switch screens the synchronous part of the high-speed optical pulse signals output by the fourth optical resonant cavity and the fourth optical pulse sequence to form low-speed optical pulse signals, and the sum of the time interval of adjacent pulse centers in the high-speed optical pulse signals and the time interval of the optical pulses in the fourth optical resonant cavity for circulating one circle is equal to the time interval of the adjacent optical pulse centers in the fourth optical pulse sequence.

Description

Optical pulse processing system and method Technical Field The application relates to the technical field of optical fiber communication, in particular to an optical pulse processing system and an optical pulse processing method. Background With the continuous development of integrated circuits, photonic chips exhibit good application prospects. The photon chip can receive the optical pulse signal, calculate the optical pulse signal, and then output the processed optical pulse signal. Among them, the photonic chip receives an optical pulse signal at a low speed, but in order to realize dense and high-speed information processing, the photonic chip generally needs to perform arithmetic processing on the high-speed optical pulse signal. Therefore, after receiving the optical pulse signal, the photonic chip needs to modulate the low-speed optical pulse signal into a high-speed optical pulse signal and then perform the operation. At present, an electro-optical modulator is used for modulating a low-speed optical pulse signal so as to obtain a high-speed optical pulse signal. For example, the lithium niobate thin film electro-optic modulator adopts a ridge thin film waveguide, and the modulation speed is improved by reducing the action thickness of the electro-optic effect, so that the modulation speed can reach more than 40 GHz. However, workers have found that lithium niobate thin film electro-optic modulators are difficult to achieve at higher modulation speeds, subject to limitations in the properties of the material itself. Disclosure of Invention In order to achieve higher modulation speed and better modulation effect on an optical modulation signal, the application discloses an optical pulse processing system. The first aspect of the present application discloses an optical pulse processing system, comprising: A first reference light pulse source for generating a periodic sequence of light pulses; The first intensity modulator is connected in series with the first reference light pulse source and is used for receiving the light pulse sequence and a low-speed light pulse signal carrying data information to be processed, modulating the light pulse sequence through the low-speed light pulse signal and obtaining a standard light pulse signal carrying the data information to be processed, and the time interval between adjacent light pulse centers of the standard light pulse signal is equal to the period time of the light pulse sequence; The high-speed signal acquisition device is connected in series with the first intensity modulator and is used for acquiring a high-speed signal corresponding to the standard optical pulse signal by carrying out resonance operation on the standard optical pulse signal; and the second intensity modulator is connected in series with the high-speed signal acquisition device and is used for selecting a high-speed optical pulse signal carrying complete information from the high-speed signals output by the high-speed signal acquisition device. Optionally, the high-speed signal acquisition device comprises a first delay modulator and a first optical resonant cavity; The first delay modulator is connected in series with the first intensity modulator and is used for sequentially carrying out delay processing on each optical pulse in the standard optical pulse signal, the delay time sequentially increases in an equal difference, and the delay time difference between adjacent optical pulses is equal to obtain a first delay signal; the first optical resonant cavity is used for sequentially acquiring each optical pulse of the first delay signal, carrying out resonance circulation on the optical pulses entering the first optical resonant cavity at different moments to acquire a superposition signal, wherein the difference between the time of the optical pulse circulating in the first optical resonant cavity and the time interval of the adjacent optical pulse center of the first delay signal is smaller than the period time of an optical pulse sequence and is larger than the pulse width of each optical pulse in the optical pulse sequence, and the superposition signal is a high-speed signal corresponding to the standard optical pulse signal; or the high-speed signal acquisition device comprises a second optical resonant cavity; The second optical resonant cavity is used for carrying out resonance circulation on the standard optical pulse signal after receiving the standard optical pulse signal and outputting an optical pulse signal after resonance circulation, wherein the optical pulse signal after resonance circulation is a high-speed signal corresponding to the standard optical pulse signal, the time of the standard optical pulse signal in the second optical resonant cavity in a circle is smaller than the time interval of the adjacent optical pulse centers of the standard optical pulse signal, and the difference between the time of the standard optical pulse signal in the second optical reson