CN112180385A - Cascaded laser signal frequency modulation method and device - Google Patents
Cascaded laser signal frequency modulation method and device Download PDFInfo
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- CN112180385A CN112180385A CN202011020508.XA CN202011020508A CN112180385A CN 112180385 A CN112180385 A CN 112180385A CN 202011020508 A CN202011020508 A CN 202011020508A CN 112180385 A CN112180385 A CN 112180385A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/50—Systems of measurement based on relative movement of target
- G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/484—Transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/491—Details of non-pulse systems
- G01S7/4911—Transmitters
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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
- G02F1/011—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 in optical waveguides, not otherwise provided for in this subclass
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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
- G02F1/125—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 in an optical waveguide structure
Abstract
The invention discloses a method and a device for modulating cascade laser signal frequency, wherein the method comprises the following steps: dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies by using an array waveguide grating; performing frequency modulation on the sub-beams within a preset frequency interval range; and combining the sub-beams according to the frequency of the frequency-modulated sub-beams in sequence to obtain a target modulation signal. The invention modulates the frequency of the sub-beams generated by the array waveguide grating and combines the sub-beams to obtain the target modulation signal, thereby having larger modulation bandwidth in shorter time and being beneficial to improving the precision of the target distance.
Description
Technical Field
The invention relates to the technical field of laser, in particular to a cascaded laser signal frequency modulation method and a cascaded laser signal frequency modulation device.
Background
In laser coherent speed measurement and distance measurement, a linear frequency modulation method is often adopted to modulate a laser emission signal, coherent frequency mixing is carried out on an echo signal and a local oscillator signal, then target distance information and speed information are solved, the distance precision of a target is inversely proportional to the modulation bandwidth, and in order to obtain high-precision distance information, large-bandwidth modulation needs to be carried out on the emission signal. The existing modulation mode mainly adopts an external modulation mode of an acousto-optic modulator or an internal modulation mode of directly modulating the current of a laser source, and the two modes are difficult to achieve a large modulation bandwidth at present.
Disclosure of Invention
The embodiment of the invention provides a cascaded laser signal frequency modulation method and device, which are used for having larger modulation bandwidth in shorter time and are beneficial to improving the precision of a target distance.
In a first aspect, an embodiment of the present invention provides a method for modulating a frequency of a cascaded laser signal, including:
dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies by using an array waveguide grating;
performing frequency modulation on the sub-beams within a preset frequency interval range;
and combining the sub-beams according to the frequency of the frequency-modulated sub-beams in sequence to obtain a target modulation signal.
Optionally, before the array waveguide grating is used to divide the pre-generated optical frequency comb laser source into sub-beams with preset modulation numbers and different frequencies, the method further includes:
and determining a frequency interval according to the target modulation signal and the modulation number.
Optionally, the pre-generated optical-frequency comb laser source comprises:
and generating the optical frequency comb teeth of the modulation number according to the frequency interval by a laser emission source according to a target modulation signal.
Optionally, the generating the modulated number of optical frequency combs according to the target modulation signal by the laser emission source according to the frequency interval includes:
generating an optical sideband signal from the frequency interval using a phase modulator;
modulating the amplitude of the optical sideband signal with an intensity modulator to obtain an optical frequency comb laser source.
Optionally, frequency-modulating the sub-beams within a preset frequency interval range includes:
and carrying out frequency modulation on the sub-beams according to the frequency interval within preset time by changing the input voltage of the acousto-optic modulator.
Optionally, combining the sub-beams according to the frequency of the frequency-modulated sub-beams in order to obtain a target modulation signal, includes:
and carrying out cascade control on the frequency-modulated sub-beams through an optical switch according to the frequency so as to obtain a target modulation signal.
Optionally, the optical switches are sequentially turned on for the preset time.
In a second aspect, an embodiment of the present invention provides a cascaded laser signal frequency modulation apparatus, including:
the array waveguide grating is used for dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies;
the modulation module is used for carrying out frequency modulation on the sub-beams within a preset frequency interval range;
and the combining module is used for sequentially combining the sub-beams according to the frequency of the frequency-modulated sub-beams so as to obtain a target modulation signal.
The embodiment of the invention performs frequency modulation on the sub-beams generated by the arrayed waveguide grating and then combines the sub-beams to obtain the target modulation signal, thereby having larger modulation bandwidth in shorter time, being beneficial to improving the precision of the target distance and obtaining positive technical effects.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a first embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
A first embodiment of the present invention provides a method for modulating a frequency of a cascaded laser signal, as shown in fig. 1, which includes the following specific steps:
s10, dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation number and different frequencies by using an array waveguide grating;
s20, performing frequency modulation on the sub-beams within a preset frequency interval range;
and S30, combining the sub-beams according to the frequency of the frequency-modulated sub-beams in sequence to obtain a target modulation signal.
According to the embodiment of the invention, the sub-beams generated by the arrayed waveguide grating are subjected to frequency modulation and then combined to obtain the target modulation signal, so that a larger modulation bandwidth can be obtained in a shorter time, and the accuracy of the target distance can be improved.
Optionally, before the array waveguide grating is used to divide the pre-generated optical frequency comb laser source into sub-beams with preset modulation numbers and different frequencies, the method may further include: and determining a frequency interval according to the target modulation signal and the modulation number.
Optionally, the pre-generated optical-frequency comb laser source comprises:
and generating the optical frequency comb teeth of the modulation number according to the frequency interval by a laser emission source according to a target modulation signal.
In the embodiment of the present invention, for example, 2GHz needs to be modulated, the 2GHz can be divided into 10 equal parts, then 10 optical frequency combs with coherent stable phase relationship are generated by one laser source, the interval of each comb tooth of the optical frequency comb is 200MHz, so as to obtain an optical frequency comb laser source, and of course, other frequencies can be obtained by the same way according to the modulation number.
Optionally, the generating the modulated number of optical frequency combs according to the target modulation signal by the laser emission source according to the frequency interval includes:
generating an optical sideband signal from the frequency interval using a phase modulator;
modulating the amplitude of the optical sideband signal with an intensity modulator to obtain an optical frequency comb laser source.
Specifically, in the present embodiment, the example of dividing the modulation frequency of 2GHz into 10 equal parts is continued, and the specific method for generating the optical-frequency comb laser source can be obtained by an electro-optical modulator (a phase modulator and an intensity modulator):
firstly, a series of optical sidebands with fixed intervals of 200MHz can be generated by a phase modulator, the amplitude of the optical sidebands are different, in order to make the amplitude of each frequency point substantially consistent, in this embodiment, an intensity modulator is further adopted to modulate the optical sideband signals after phase modulation, and the amplitude of the optical sideband signals is substantially consistent, so as to obtain an optical-frequency comb laser source, then the optical-frequency comb laser source with consistent amplitude is divided into 10 sub-beams with different frequencies by an arrayed waveguide grating, for example, 2GHz modulation is taken as an example, the optical-frequency comb laser source can be divided into fixed intervals according to the frequency intervals, and the fixed frequency points are determined, for example, the determined fixed frequency points of the sub-beams are 100MHz, 300MHz, 500MHz, 700MHz, …, 1.7GHz and 1.9GHz, then the target modulation signal can be obtained by performing frequency modulation in the preset frequency interval range on the basis of the sub-beams, of course, the fixed frequency of the 10 sub-beams with different frequencies divided by the arrayed waveguide grating may be selected to be other values as long as the target modulation signal is covered, and the frequency points are only used as examples and are not specifically limited.
Optionally, frequency-modulating the sub-beams within a preset frequency interval range includes:
and carrying out frequency modulation on the sub-beams according to the frequency interval within preset time by changing the input voltage of the acousto-optic modulator.
Continuing to exemplify the present embodiment by dividing the modulated 2GHz into 10 equal parts, on the basis of the obtained sub-beams, the frequency modulation of 200MHz is performed on each sub-beam by the acousto-optic modulator in the present embodiment within a preset time. Wherein the predetermined time is also obtained according to the target modulation signal and the modulation amount, for example, a laser source that needs to modulate 2GHz within 2 μ s is required, the 2GHz is divided into 10 parts, and the 2 μ s is also divided into 10 parts, that is, the fixed frequency point of the obtained sub-beams can be 0.2 μ s 100MHz, 0.2 μ s 300MHz, 0.2 μ s 500MHz, …, 0.2 μ s 1.7GHz, 0.2 μ s 1.9GHz, each sub-beam is correspondingly modulated with 200MHz within 0.2 μ s, thereby obtaining modulation signals of 0.2 μ s 0-200MHz, 0.2 μ s 400MHz, …, 0.2 μ s1.6-1.8GHz, 0.2 μ s 1.8-2.0 GHz.
Optionally, combining the externally modulated signals to obtain the target modulated signal, includes:
optionally, combining the sub-beams according to the frequency of the frequency-modulated sub-beams in order to obtain a target modulation signal, includes:
and carrying out cascade control on the frequency-modulated sub-beams through an optical switch according to the frequency so as to obtain a target modulation signal.
Optionally, the optical switches are sequentially turned on for the preset time.
Specifically, after 10 sub-beams are modulated, 10 sub-beams are cascaded according to frequency to form a laser source of a 2GHz target modulation signal, and then the 10 signals are controlled by 10 optical switches, and each optical switch is sequentially turned on for a preset time, for example, each optical switch is sequentially turned on for 0.2 μ s, thereby forming a laser source of a target modulation 2 μ s2 GHz.
In summary, the method of this embodiment provides a cascaded laser signal frequency modulation method, which can have a larger modulation bandwidth in a shorter time, and is beneficial to improving the accuracy of the target distance.
Example two
A second embodiment of the present invention provides an implementation example of a cascaded laser signal frequency modulation method, and in this embodiment, a 2GHz chirp is performed on a laser emission source (the wavelength of the laser emission source is 1550nm) within 2 μ s as an example.
The method comprises the following steps:
s101, dividing 2GHz frequency modulation in 2 mu S into 10 sections, wherein each section only needs to modulate 200MHz laser emission source in 0.2 us.
And S102, generating 10 comb teeth through a laser emission source, wherein the frequency interval of each comb tooth is 200 MHz. The method of generating a frequency comb laser source can be obtained by means of electro-optical modulators (phase modulator and intensity modulator):
in order to make the amplitude of each frequency point basically consistent, an intensity modulator is adopted to modulate the optical frequency signal after phase modulation, and the amplitude of the optical frequency signal is basically adjusted to be consistent.
S103, dividing the optical frequency comb laser source with the consistent amplitude into 10 sub-beams with different frequencies through an arrayed waveguide grating.
And S104, performing 200MHz frequency modulation on each sub-beam within 0.2us by using the acousto-optic modulator, wherein the frequency modulation can be obtained by changing the input voltage of the acousto-optic modulator.
And S105, cascading the signals of the 10 paths of sub-beams to form a 2-microsecond internal modulation 2GHz laser source, wherein the 10 paths of signals are controlled by optical switching, the switching-on time of each optical switch is 0.2 microsecond, and the 10 paths of beams are sequentially switched on for 0.2 microsecond, so that the 2-microsecond internal modulation 2GHz laser source is formed.
In summary, the method of this embodiment provides a cascaded laser signal frequency modulation method, which can have a larger modulation bandwidth in a shorter time, and is beneficial to improving the accuracy of the target distance.
EXAMPLE III
A third embodiment of the present invention provides a cascaded laser signal frequency modulation apparatus, including:
the array waveguide grating is used for dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies;
the modulation module is used for carrying out frequency modulation on the sub-beams within a preset frequency interval range;
and the combining module is used for combining the sub-beams according to the frequency of the frequency-modulated sub-beams in sequence to obtain a target modulation signal.
The determination of the frequency interval in this embodiment may be determined according to the target modulation signal and the modulation number. For example, 2GHz linear frequency modulation needs to be carried out on a laser emission source within 2 mu s, the frequency modulation can be divided into 10 equal parts, each part is subjected to 200MHz modulation within 0.2 mu s, then 10 optical frequency combs with coherent stable phase relation are generated by one laser source, the interval of each comb tooth of each optical frequency comb is 200MHz, then the optical frequency signals of each comb tooth are subjected to 200MHz external modulation, and finally, each modulated signal is combined.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A method of cascaded frequency modulation of a laser signal, comprising:
dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies by using an array waveguide grating;
performing frequency modulation on the sub-beams within a preset frequency interval range;
and combining the sub-beams according to the frequency of the frequency-modulated sub-beams in sequence to obtain a target modulation signal.
2. The cascaded laser signal frequency modulation method of claim 1, wherein before the pre-generated optical frequency comb laser source is divided into a preset number of modulated sub-beams with different frequencies by the arrayed waveguide grating, the method further comprises:
and determining a frequency interval according to the target modulation signal and the modulation number.
3. The cascaded laser signal frequency modulation method of claim 1, wherein pre-generating an optical-frequency comb laser source, comprises:
and generating the optical frequency comb teeth of the modulation number according to the frequency interval by a laser emission source according to a target modulation signal.
4. The cascaded laser signal frequency modulation method of claim 3, wherein generating the modulated number of optical frequency combs at the frequency intervals from a target modulation signal by a laser emission source, comprises:
generating an optical sideband signal from the frequency interval using a phase modulator;
modulating the amplitude of the optical sideband signal with an intensity modulator to obtain an optical frequency comb laser source.
5. The cascaded laser signal frequency modulation method of any one of claims 1-4, wherein frequency modulating the sub-beams over a predetermined frequency interval comprises:
and carrying out frequency modulation on the sub-beams according to the frequency interval within preset time by changing the input voltage of the acousto-optic modulator.
6. The method of frequency modulating a laser signal in cascade of claim 5 wherein combining the sub-beams in order of their frequency magnitude after frequency modulation to obtain a target modulation signal comprises:
and carrying out cascade control on the frequency-modulated sub-beams through an optical switch according to the frequency so as to obtain a target modulation signal.
7. The method of cascaded frequency modulation of a laser signal as claimed in claim 6 wherein said optical switches are sequentially turned on for said predetermined time.
8. A cascaded laser signal frequency modulation apparatus, comprising:
the array waveguide grating is used for dividing a pre-generated optical frequency comb laser source into sub-beams with preset modulation quantity and different frequencies;
the modulation module is used for carrying out frequency modulation on the sub-beams within a preset frequency interval range;
and the combining module is used for sequentially combining the sub-beams according to the frequency of the frequency-modulated sub-beams so as to obtain a target modulation signal.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030053167A1 (en) * | 2001-09-14 | 2003-03-20 | Xiaojie Xu | Cascaded optical multiplexer |
| US20070076282A1 (en) * | 2003-11-14 | 2007-04-05 | Motonobu Kourogi | Optical frequency comb generator and optical modulator |
| CN1967953A (en) * | 2005-11-18 | 2007-05-23 | Jds尤尼弗思公司 | Single spatial mode output multi-mode interference laser diode with external cavity |
| US20140334830A1 (en) * | 2012-06-20 | 2014-11-13 | U.S.A. As Represented By The Administrator Of The National Aeronautics And Space Administration | System and Method for Generating A Frequency Modulated Linear Laser Waveform |
| CN106547120A (en) * | 2016-11-25 | 2017-03-29 | 天津大学 | The frequency comb multistage light wave joining method of ultra-wide spectrum scope linear frequency sweep light source |
| CN108702234A (en) * | 2016-05-05 | 2018-10-23 | 华为技术有限公司 | Reconfigurable optical add/drop multiplexer |
| CN110365413A (en) * | 2019-07-03 | 2019-10-22 | 北京迈微时代科技有限公司 | A kind of light load radio frequency beam shaping system based on relevant frequency comb |
| US20200007261A1 (en) * | 2017-11-15 | 2020-01-02 | Southwest Jiaotong University | Radio-over-fiber communication beamforming device based on arrayed waveguide grating and method thereof |
-
2020
- 2020-09-25 CN CN202011020508.XA patent/CN112180385B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030053167A1 (en) * | 2001-09-14 | 2003-03-20 | Xiaojie Xu | Cascaded optical multiplexer |
| US20070076282A1 (en) * | 2003-11-14 | 2007-04-05 | Motonobu Kourogi | Optical frequency comb generator and optical modulator |
| CN1967953A (en) * | 2005-11-18 | 2007-05-23 | Jds尤尼弗思公司 | Single spatial mode output multi-mode interference laser diode with external cavity |
| US20140334830A1 (en) * | 2012-06-20 | 2014-11-13 | U.S.A. As Represented By The Administrator Of The National Aeronautics And Space Administration | System and Method for Generating A Frequency Modulated Linear Laser Waveform |
| CN108702234A (en) * | 2016-05-05 | 2018-10-23 | 华为技术有限公司 | Reconfigurable optical add/drop multiplexer |
| CN106547120A (en) * | 2016-11-25 | 2017-03-29 | 天津大学 | The frequency comb multistage light wave joining method of ultra-wide spectrum scope linear frequency sweep light source |
| US20200007261A1 (en) * | 2017-11-15 | 2020-01-02 | Southwest Jiaotong University | Radio-over-fiber communication beamforming device based on arrayed waveguide grating and method thereof |
| CN110365413A (en) * | 2019-07-03 | 2019-10-22 | 北京迈微时代科技有限公司 | A kind of light load radio frequency beam shaping system based on relevant frequency comb |
Non-Patent Citations (5)
| Title |
|---|
| JUN-MING AN ET AL.: "Hybrid silica coarse wavelength-division multiplexer transmitter optical subassembly", 《OPTICAL ENGINEERING》, vol. 57, no. 1, pages 1 - 6 * |
| 刘波等: "阵列分束激光三维成像技术", vol. 48, no. 6, pages 312 - 317 * |
| 姚佳彤: "双光梳锁相技术及其应用研究", no. 6, pages 8 - 13 * |
| 肖凯博等: "欧洲HiPER项目激光驱动器概念设计研究现状", 《激光与光电子学进展》, vol. 52, no. 8, pages 45 - 52 * |
| 高妍琦等: "基于低相干光的阵列透镜束匀滑技术研究", 《物理学报》, vol. 68, no. 7, pages 205 - 212 * |
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