CN104734783A - Arbitrary waveform light pulse generator - Google Patents
Arbitrary waveform light pulse generator Download PDFInfo
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- CN104734783A CN104734783A CN201510171056.8A CN201510171056A CN104734783A CN 104734783 A CN104734783 A CN 104734783A CN 201510171056 A CN201510171056 A CN 201510171056A CN 104734783 A CN104734783 A CN 104734783A
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Abstract
An arbitrary waveform light pulse generator is composed of a single wavelength laser, a polarization controller, amplitude modulators, an adjustable tuning band pass filter, a microwave delay line, a 20:80 coupler, a microwave coupler, a microwave source and an erbium-doped optical fiber amplifier. Microwave generated through the microwave source is divided into two paths through the coupler, the paths pass through the adjustable microwave delay line, the single wavelength laser is modulated through the one amplitude modulator, an upper side band is filtered out through the adjustable tuning band pass filter and is divided into two parts through the 20:80 coupler, 20% of the part is taken as a frequency of frequency comb while 80% of the other part is modulated through the other amplitude modulator, another frequency of the frequency comb is generated, the microwave delay line is adjusted according to the amplitude modulation principle, the phase position of the frequency comb can be adjusted, the frequency comb can be adjusted in amplitude by adjusting driving current of the erbium-doped optical fiber amplifier, and sizing is realized, the phase position and amplitude adjusting method is simple, and steady operation under constant temperature can be achieved.
Description
Technical field
The invention belongs to optical fiber communication and photoelectron technical field, particularly a kind of random waveform optical pulse generator.
Background technology
Along with modern communication networks, the rolling up of computer network business, data volume explosive growth, the requirement of people to bandwidth is more and more higher, and one of key addressed this problem is exactly the various complicated pattern that can produce the modulation of full light vector.This just not only requires that the amplitude of light pulse can control, and also requires can control according to demand the waveform of light pulse and phase place.In the past few years, the phase place of the electric field that the development of optics makes control and measurement corresponding with light pulse becomes possibility, and this development facilitates the research of the random waveform generation technology of optical frequency com (being called for short " light comb ") and area of light.The random waveform of area of light produces the ultrashort light pulse that technology can produce random waveform in area of light, breach the restriction of electronic bottleneck to speed, not only can be used in Ultra-High Speed Optical Communication and carry out dispersion compensation, for producing the light pulse of various pattern in high speed optical communication, wide-band microwave signal can also be produced, be conducive to the transmission rate improving communication network further, have broad application prospects in the field such as optical communication and optical information processing.
Summary of the invention
The object of the invention is for above-mentioned technical Analysis, provide a kind of low cost, compact conformation, phase place to adjust simple random waveform optical pulse generator.
Technical scheme of the present invention:
A kind of random waveform optical pulse generator, by single wavelength laser, Polarization Controller a, amplitude modulator a, adjustable tunable bandpass filter a, microwave delay line a, 20:80 coupler a, micro-wave coupler, microwave source, erbium-doped fiber amplifier a, Polarization Controller b, amplitude modulator b, microwave delay line b, adjustable tunable bandpass filter b, 20:80 coupler b and erbium-doped fiber amplifier b forms, single wavelength laser, Polarization Controller a, amplitude modulator a, adjustable tunable bandpass filter a, 20:80 coupler a, Polarization Controller b, amplitude modulator b, adjustable tunable bandpass filter b and 20:80 coupler b is connected in series by optical fiber, wherein single wavelength laser is connected with one end of Polarization Controller a, the other end of Polarization Controller a is connected with a port of amplitude modulator a, the c port of amplitude modulator a is connected with the input of adjustable tunable bandpass filter a, the output port of adjustable tunable bandpass filter a is connected with the d port of 20:80 coupler a, the e port of 20:80 coupler a is connected with one end of Polarization Controller b, the f port of 20:80 coupler a is connected with erbium-doped fiber amplifier a, the other end of Polarization Controller b is connected with the j port of amplitude modulator b, the l port of amplitude modulator b is connected with the input of adjustable tunable bandpass filter b, and the output of adjustable tunable bandpass filter b is connected with the m port of 20:80 coupler b, the b port of amplitude modulator a is connected with one end of microwave delay line a, the other end of microwave delay line a is connected with the h port of micro-wave coupler, the i port of micro-wave coupler is connected with one end of microwave delay line b, the other end of microwave delay line b is connected with the k port of amplitude modulator b, and the g port of micro-wave coupler is connected with microwave source, the n port of 20:80 coupler b is connected with erbium-doped fiber amplifier b, and the p port of 20:80 coupler b is Extended Capabilities Port.
Operation principle of the present invention:
The microwave produced by microwave source is divided into two-way (also extending to n road) through coupler, after tunable microwave delay line, amplitude modulator is utilized to modulate single wavelength laser, tunable bandpass filters leaches its upper sideband, application 20:80 coupler is divided into two parts, 20% part is as a frequency of frequency comb, and 80% part is subject to the modulation of another one amplitude modulator, and then produce the another one frequency of frequency comb, according to amplitude modulation(PAM) principle, adjustment microwave delay line, the i.e. phase place of adjustable frequency comb, and the drive current changing er-doped image amplifier can adjust frequency comb amplitude, and then realize shaping.This structure, through expansion, can produce multiple frequency.
Advantage of the present invention is: to adjust frequency the phase place of comb with changing the mode of microwave phase, the amplitude of comb of adjusting frequency by the mode of adjustment erbium-doped fiber amplifier amplifier drive current, phase place and amplitude adjustment method simple, can steady operation at normal temperatures.
Accompanying drawing explanation
Fig. 1 is the structural representation of random waveform optical pulse generator of the present invention.
In figure: 1. single wavelength laser 2. Polarization Controller a 3. amplitude modulator a
4. adjustable tunable bandpass filter a 5. microwave delay line a 6.20:80 coupler a 7. micro-wave coupler 8. microwave source 9. erbium-doped fiber amplifier a 10. Polarization Controller b 11. amplitude modulator b
12. microwave delay line b 13. adjustable tunable bandpass filter b 14.20:80 coupler b
15. erbium-doped fiber amplifier b.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment 1:
A kind of random waveform optical pulse generator, as shown in Figure 1, by single wavelength laser 1, Polarization Controller a 2, amplitude modulator a 3, adjustable tunable bandpass filter a4, microwave delay line a 5, 20:80 coupler a6, micro-wave coupler 7, microwave source 8, erbium-doped fiber amplifier a9, Polarization Controller b10, amplitude modulator b 11, microwave delay line b 12, adjustable tunable bandpass filter b 13, 20:80 coupler b 14 and erbium-doped fiber amplifier b 15 forms, single wavelength laser 1, Polarization Controller a 2, amplitude modulator a 3, adjustable tunable bandpass filter a4, 20:80 coupler a6, Polarization Controller b10, amplitude modulator b 11, adjustable tunable bandpass filter b 13 and 20:80 coupler b 14 is connected in series by optical fiber, wherein single wavelength laser 1 is connected with one end of Polarization Controller a2, the other end of Polarization Controller a2 is connected with a port of amplitude modulator a3, the c port of amplitude modulator a3 is connected with the input of adjustable tunable bandpass filter a 4, the output port of adjustable tunable bandpass filter a4 is connected with the d port of 20:80 coupler a6, the e port of 20:80 coupler a6 is connected with one end of Polarization Controller b10, the f port of 20:80 coupler a6 is connected with erbium-doped fiber amplifier a9, the other end of Polarization Controller b10 is connected with the j port of amplitude modulator b11, the l port of amplitude modulator b11 is connected with the input of adjustable tunable bandpass filter b13, the output of adjustable tunable bandpass filter b13 is connected with the m port of 20:80 coupler b14, the b port of amplitude modulator a3 is connected with one end of microwave delay line a5, the other end of microwave delay line a5 is connected with the h port of micro-wave coupler 7, the i port of micro-wave coupler 7 is connected with one end of microwave delay line b12, the other end of microwave delay line b12 is connected with the k port of amplitude modulator b11, and the g port of micro-wave coupler 7 is connected with microwave source 8, the n port of 20:80 coupler b14 is connected with erbium-doped fiber amplifier b 15, and the p port of 20:80 coupler b14 is Extended Capabilities Port.
In this embodiment, microwave source can be passed through coupler can be divided into 3-10 road, and then generation frequency number is the frequency comb of 3-10; Amplitude modulator 12 can replace the reference carrier frequency phase-modulator all identical with frequency modulating signal scope; The bandwidth of tunable bandpass filters is less than microwave frequency.
Claims (1)
1. a random waveform optical pulse generator, is characterized in that: by single wavelength laser, Polarization Controller a, amplitude modulator a, adjustable tunable bandpass filter a, microwave delay line a, 20:80 coupler a, micro-wave coupler, microwave source, erbium-doped fiber amplifier a, Polarization Controller b, amplitude modulator b, microwave delay line b, adjustable tunable bandpass filter b, 20:80 coupler b and erbium-doped fiber amplifier b forms, single wavelength laser, Polarization Controller a, amplitude modulator a, adjustable tunable bandpass filter a, 20:80 coupler a, Polarization Controller b, amplitude modulator b, adjustable tunable bandpass filter b and 20:80 coupler b is connected in series by optical fiber, wherein single wavelength laser is connected with one end of Polarization Controller a, the other end of Polarization Controller a is connected with a port of amplitude modulator a, the c port of amplitude modulator a is connected with the input of adjustable tunable bandpass filter a, the output port of adjustable tunable bandpass filter a is connected with the d port of 20:80 coupler a, the e port of 20:80 coupler a is connected with one end of Polarization Controller b, the f port of 20:80 coupler a is connected with erbium-doped fiber amplifier a, the other end of Polarization Controller b is connected with the j port of amplitude modulator b, the l port of amplitude modulator b is connected with the input of adjustable tunable bandpass filter b, and the output of adjustable tunable bandpass filter b is connected with the m port of 20:80 coupler b, the b port of amplitude modulator a is connected with one end of microwave delay line a, the other end of microwave delay line a is connected with the h port of micro-wave coupler, the i port of micro-wave coupler is connected with one end of microwave delay line b, the other end of microwave delay line b is connected with the k port of amplitude modulator b, and the g port of micro-wave coupler is connected with microwave source, the n port of 20:80 coupler b is connected with erbium-doped fiber amplifier b, and the p port of 20:80 coupler b is Extended Capabilities Port.
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| CN201510171056.8A CN104734783B (en) | 2015-04-13 | 2015-04-13 | A kind of random waveform optical pulse generator |
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| CN201510171056.8A CN104734783B (en) | 2015-04-13 | 2015-04-13 | A kind of random waveform optical pulse generator |
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| CN104734783B CN104734783B (en) | 2017-08-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106207737A (en) * | 2016-10-10 | 2016-12-07 | 中国工程物理研究院激光聚变研究中心 | A kind of laser shaping pulse acquisition device and acquisition methods |
| CN109616860A (en) * | 2019-02-12 | 2019-04-12 | 北京交通大学 | A kind of fiber amplifier |
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| CN109616860A (en) * | 2019-02-12 | 2019-04-12 | 北京交通大学 | A kind of fiber amplifier |
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