CN104734783A - Arbitrary waveform light pulse generator - Google Patents
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Abstract
一种任意波形光脉冲发生器，由单波长激光器、偏振控制器、幅度调制器、可调调谐带通滤波器、微波延时线、20:80耦合器、微波耦合器、微波源和掺铒光纤放大器组成，由微波源产生的微波经过耦合器分成两路，经过可调谐微波延时线后，利用幅度调制器调制单波长激光器，可调谐带通滤波器滤出其上边带，应用20:80 耦合器分为两部分，20%部分作为频率梳的一个频率，而80%部分受到另外一个幅度调制器的调制，进而产生频率梳的另外一个频率，根据幅度调制原理，调整微波延时线，即可调整频率梳的相位，而改变掺铒光线放大器的驱动电流可以调整频率梳的幅度，进而实现整形；相位和幅度调整方法简单，能够在常温下稳定工作。
An arbitrary waveform optical pulse generator, consisting of a single-wavelength laser, a polarization controller, an amplitude modulator, an adjustable tunable bandpass filter, a microwave delay line, a 20:80 coupler, a microwave coupler, a microwave source and erbium-doped Composed of optical fiber amplifier, the microwave generated by the microwave source is divided into two paths through the coupler. After passing through the tunable microwave delay line, the amplitude modulator is used to modulate the single-wavelength laser, and the tunable bandpass filter filters out its upper sideband. Application 20: The 80 coupler is divided into two parts, the 20% part is used as a frequency of the frequency comb, and the 80% part is modulated by another amplitude modulator to generate another frequency of the frequency comb. According to the principle of amplitude modulation, the microwave delay line is adjusted , the phase of the frequency comb can be adjusted, and the amplitude of the frequency comb can be adjusted by changing the driving current of the erbium-doped optical amplifier, thereby realizing shaping; the phase and amplitude adjustment methods are simple, and can work stably at room temperature.
Description
技术领域 technical field
本发明属于光纤通信和光电子技术领域，特别是一种任意波形光脉冲发生器。 The invention belongs to the technical fields of optical fiber communication and optoelectronics, in particular to an arbitrary waveform optical pulse generator.
背景技术 Background technique
随着现代通信网、计算机网业务的大量增加，数据量爆炸式的增长，人们对带宽的要求越来越高，而解决这一问题的关键之一就是能产生全光矢量调制的各种复杂码型。这就不仅要求光脉冲的幅度可以控制，还要求对光脉冲的波形及相位能够根据需求进行控制。在过去几年，光学的发展使得控制和测量与光脉冲对应的电场的相位成为可能，这一发展促进了光学频率梳(简称“光梳”)和光域的任意波形产生技术的研究。光域的任意波形产生技术能够在光域上产生任意波形的超短光脉冲，突破了电子瓶颈对速度的制约，不仅可用在超高速光纤通信中进行色散补偿，用于高速光通信中产生各种码型的光脉冲，还能够产生宽带微波信号，有利于进一步提高通信网的传输速率，在光通信以及光信息处理等领域具有广阔的应用前景。 With the massive increase of modern communication networks and computer network services and the explosive growth of data volume, people have higher and higher requirements for bandwidth, and one of the keys to solving this problem is to be able to generate various complex optical vector modulation pattern. This requires not only the amplitude of the optical pulse to be controllable, but also the waveform and phase of the optical pulse to be controlled according to requirements. In the past few years, the development of optics has made it possible to control and measure the phase of the electric field corresponding to the optical pulse, which has promoted the research of optical frequency comb ("optical comb" for short) and arbitrary waveform generation technology in the optical domain. Arbitrary waveform generation technology in the optical domain can generate ultra-short optical pulses of arbitrary waveforms in the optical domain, breaking through the speed restriction of the electronic bottleneck, not only can be used for dispersion compensation in ultra-high-speed optical fiber communication, but also for generating various optical pulses in high-speed optical communication. The optical pulse of this kind of pattern can also generate broadband microwave signals, which is conducive to further improving the transmission rate of communication networks, and has broad application prospects in the fields of optical communication and optical information processing.
发明内容 Contents of the invention
本发明的目的是针对上述技术分析，提供一种低成本、结构紧凑、相位调整简单的任意波形光脉冲发生器。 The object of the present invention is to provide an arbitrary waveform optical pulse generator with low cost, compact structure and simple phase adjustment in view of the above technical analysis.
本发明的技术方案： Technical scheme of the present invention:
一种任意波形光脉冲发生器，由单波长激光器、偏振控制器a、幅度调制器a 、可调调谐带通滤波器a、微波延时线a 、20:80耦合器a、微波耦合器、微波源、掺铒光纤放大器a、偏振控制器b、幅度调制器b 、微波延时线b、可调调谐带通滤波器b 、20:80耦合器b和掺铒光纤放大器b组成，单波长激光器、偏振控制器a、幅度调制器a、可调调谐带通滤波器a、20:80耦合器a、偏振控制器b、幅度调制器b、可调调谐带通滤波器b和20:80耦合器b通过光纤串联连接，其中单波长激光器与偏振控制器a的一端相连，偏振控制器a的另一端与幅度调制器a的a端口相连，幅度调制器a的c端口与可调调谐带通滤波器a的输入端相连，可调调谐带通滤波器a的输出端口与20:80耦合器a的d端口相连，20:80耦合器a的e端口与偏振控制器b的一端相连，20:80耦合器a的f端口与掺铒光纤放大器a相连，偏振控制器b的另一端与幅度调制器b的j端口相连，幅度调制器b的l端口与可调调谐带通滤波器b的输入端相连，可调调谐带通滤波器b的输出端与20:80耦合器b的m端口相连；幅度调制器a的b端口与微波延时线a的一端相连，微波延时线a的另一端与微波耦合器的h端口相连，微波耦合器的i端口与微波延时线b的一端相连，微波延时线b的另一端与幅度调制器b的k端口相连，微波耦合器的g端口与微波源相连；20:80耦合器b的n端口与掺铒光纤放大器b相连，20:80耦合器b的p端口为扩展端口。 An arbitrary waveform optical pulse generator, comprising a single-wavelength laser, a polarization controller a, an amplitude modulator a, an adjustable tunable bandpass filter a, a microwave delay line a, a 20:80 coupler a, a microwave coupler, Composed of microwave source, erbium-doped fiber amplifier a, polarization controller b, amplitude modulator b, microwave delay line b, tunable bandpass filter b, 20:80 coupler b and erbium-doped fiber amplifier b, single wavelength Laser, polarization controller a, amplitude modulator a, tunable bandpass filter a, 20:80 coupler a, polarization controller b, amplitude modulator b, tunable bandpass filter b, and 20:80 The coupler b is connected in series through an optical fiber, in which the single-wavelength laser is connected to one end of the polarization controller a, the other end of the polarization controller a is connected to the a port of the amplitude modulator a, and the c port of the amplitude modulator a is connected to the adjustable tuning band The input terminal of the pass filter a is connected, the output port of the adjustable bandpass filter a is connected with the d port of the 20:80 coupler a, the e port of the 20:80 coupler a is connected with one end of the polarization controller b, 20:80 The f port of the coupler a is connected to the erbium-doped fiber amplifier a, the other end of the polarization controller b is connected to the j port of the amplitude modulator b, and the l port of the amplitude modulator b is connected to the tunable bandpass filter b The input end of the adjustable bandpass filter b is connected to the m port of the 20:80 coupler b; the b port of the amplitude modulator a is connected to one end of the microwave delay line a, and the microwave delay line a The other end of the microwave coupler is connected to the h port of the microwave coupler, the i port of the microwave coupler is connected to one end of the microwave delay line b, the other end of the microwave delay line b is connected to the k port of the amplitude modulator b, and the microwave coupler’s The g port is connected to the microwave source; the n port of the 20:80 coupler b is connected to the erbium-doped fiber amplifier b, and the p port of the 20:80 coupler b is an expansion port.
本发明的工作原理： Working principle of the present invention:
由微波源产生的微波经过耦合器分成两路（也可扩展到n路），经过可调谐微波延时线后，利用幅度调制器调制单波长激光器，可调谐带通滤波器滤出其上边带，应用20:80 耦合器分为两部分，20%部分作为频率梳的一个频率，而80%部分受到另外一个幅度调制器的调制，进而产生频率梳的另外一个频率，根据幅度调制原理，调整微波延时线，即可调整频率梳的相位，而改变掺铒光线放大器的驱动电流可以调整频率梳的幅度，进而实现整形。该结构经过扩展，可以产生多个频率。 The microwave generated by the microwave source is divided into two paths (can also be extended to n paths) through the coupler. After passing through the tunable microwave delay line, the amplitude modulator is used to modulate the single-wavelength laser, and the tunable bandpass filter filters out its upper sideband. , using a 20:80 coupler to divide it into two parts, 20% of which is used as a frequency of the frequency comb, and 80% of which is modulated by another amplitude modulator to generate another frequency of the frequency comb. According to the principle of amplitude modulation, adjust The microwave delay line can adjust the phase of the frequency comb, and changing the driving current of the erbium-doped optical amplifier can adjust the amplitude of the frequency comb, thereby realizing shaping. The structure is extended to generate multiple frequencies.
本发明的优点是：用改变微波相位的方式来调整频率梳的相位，用调整掺铒光纤放大器放大器驱动电流的方式调整频率梳的幅度，相位和幅度调整方法简单，能够在常温下稳定工作。 The invention has the advantages that the phase of the frequency comb is adjusted by changing the phase of the microwave, and the amplitude of the frequency comb is adjusted by adjusting the drive current of the erbium-doped fiber amplifier amplifier. The phase and amplitude adjustment method is simple and can work stably at normal temperature.
附图说明 Description of drawings
图1是本发明的任意波形光脉冲发生器的结构示意图。 Fig. 1 is a schematic structural diagram of an arbitrary waveform optical pulse generator of the present invention.
图中：1.单波长激光器 2.偏振控制器a 3.幅度调制器a In the figure: 1. Single wavelength laser 2. Polarization controller a 3. Amplitude modulator a
4.可调调谐带通滤波器a 5.微波延时线a 6.20:80耦合器a 7.微波耦合器 8.微波源 9.掺铒光纤放大器a 10.偏振控制器b 11.幅度调制器b 4. Adjustable tunable bandpass filter a 5. Microwave delay line a 6. 20:80 coupler a 7. Microwave coupler 8. Microwave source 9. Erbium-doped fiber amplifier a 10. Polarization controller b 11. Amplitude modulator b
12.微波延时线b 13.可调调谐带通滤波器b 14.20:80耦合器b 12. Microwave delay lineb 13. Adjustable tuned bandpass filterb 14.20:80 couplerb
15.掺铒光纤放大器b 。 15. Erbium-doped fiber amplifier b.
具体实施方式 Detailed ways
下面结合附图对本发明作进一步的具体说明。 The present invention will be further described in detail below in conjunction with the accompanying drawings.
实施例1： Example 1:
一种任意波形光脉冲发生器，如图1所示，由单波长激光器1、偏振控制器a 2、幅度调制器a 3、可调调谐带通滤波器a4、微波延时线a 5、20:80耦合器a6、微波耦合器 7、微波源 8、掺铒光纤放大器a9、偏振控制器b10、幅度调制器b 11、微波延时线b 12、可调调谐带通滤波器b 13、20:80耦合器b 14和掺铒光纤放大器b 15组成，单波长激光器1、偏振控制器a 2、幅度调制器a 3、可调调谐带通滤波器a4、20:80耦合器a6、偏振控制器b10、幅度调制器b 11、可调调谐带通滤波器b 13和20:80耦合器b 14通过光纤串联连接，其中单波长激光器1与偏振控制器a2的一端相连，偏振控制器a2的另一端与幅度调制器a3的a端口相连，幅度调制器a3的c端口与可调调谐带通滤波器a 4的输入端相连，可调调谐带通滤波器a4的输出端口与20:80耦合器a6的d端口相连，20:80耦合器a6的e端口与偏振控制器b10的一端相连，20:80耦合器a6的f端口与掺铒光纤放大器a9相连，偏振控制器b10的另一端与幅度调制器b11的j端口相连，幅度调制器b11的l端口与可调调谐带通滤波器b13的输入端相连，可调调谐带通滤波器b13的输出端与20:80耦合器b14的m端口相连；幅度调制器a3的b端口与微波延时线a5的一端相连，微波延时线a5的另一端与微波耦合器7的h端口相连，微波耦合器7的i端口与微波延时线b12的一端相连，微波延时线b12的另一端与幅度调制器b11的k端口相连，微波耦合器7的g端口与微波源8相连；20:80耦合器b14的n端口与掺铒光纤放大器b 15相连，20:80耦合器b14的p端口为扩展端口。 An arbitrary waveform optical pulse generator, as shown in Figure 1, consists of a single-wavelength laser 1, a polarization controller a 2, an amplitude modulator a 3, an adjustable and tunable bandpass filter a4, and a microwave delay line a 5, 20 : 80 coupler a6, microwave coupler 7, microwave source 8, erbium-doped fiber amplifier a9, polarization controller b10, amplitude modulator b 11, microwave delay line b 12, tunable bandpass filter b 13, 20 :80 coupler b 14 and erbium-doped fiber amplifier b 15, single-wavelength laser 1, polarization controller a 2, amplitude modulator a 3, adjustable bandpass filter a4, 20:80 coupler a6, polarization control b10, amplitude modulator b11, tunable bandpass filter b13, and 20:80 coupler b14 are connected in series through optical fibers, wherein the single-wavelength laser 1 is connected to one end of the polarization controller a2, and the polarization controller a2 The other end is connected to the a port of the amplitude modulator a3, the c port of the amplitude modulator a3 is connected to the input end of the adjustable bandpass filter a4, and the output port of the adjustable bandpass filter a4 is coupled with 20:80 The port d of the 20:80 coupler a6 is connected to the port d of the polarization controller b10, the port f of the 20:80 coupler a6 is connected to the erbium-doped fiber amplifier a9, and the other end of the polarization controller b10 is connected to the The j port of the amplitude modulator b11 is connected, the l port of the amplitude modulator b11 is connected with the input end of the adjustable bandpass filter b13, the output end of the adjustable bandpass filter b13 is connected with the m of the 20:80 coupler b14 The ports are connected; the b port of the amplitude modulator a3 is connected with one end of the microwave delay line a5, the other end of the microwave delay line a5 is connected with the h port of the microwave coupler 7, and the i port of the microwave coupler 7 is connected with the microwave delay line One end of b12 is connected, the other end of the microwave delay line b12 is connected with the k port of the amplitude modulator b11, the g port of the microwave coupler 7 is connected with the microwave source 8; the n port of the 20:80 coupler b14 is connected with the erbium-doped fiber amplifier b 15 is connected, and the p port of the 20:80 coupler b14 is an expansion port.
该实施例中， 微波源可经过耦合器可分为3-10路，进而产生频率数为3-10的频率梳；幅度调制器1 2可以换位载波频率范围和调制信号频率范围都相同的相位调制器；可调谐带通滤波器的带宽小于微波频率。 In this embodiment, the microwave source can be divided into 3-10 paths through the coupler, and then generate a frequency comb with a frequency number of 3-10; the amplitude modulator 12 can transpose the carrier frequency range and the modulation signal frequency range are the same Phase modulator; tunable bandpass filter with bandwidth smaller than microwave frequencies.
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| CN109616860A (en) * | 2019-02-12 | 2019-04-12 | 北京交通大学 | a fiber amplifier |
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