CN102496842A - High pulse repetition frequency mode-locking optical fiber laser - Google Patents

High pulse repetition frequency mode-locking optical fiber laser Download PDF

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CN102496842A
CN102496842A CN2011104217358A CN201110421735A CN102496842A CN 102496842 A CN102496842 A CN 102496842A CN 2011104217358 A CN2011104217358 A CN 2011104217358A CN 201110421735 A CN201110421735 A CN 201110421735A CN 102496842 A CN102496842 A CN 102496842A
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laser
optical fiber
mode
fiber
resonator
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CN2011104217358A
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叶泞泞
叶青
潘政清
瞿荣辉
蔡海文
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中国科学院上海光学精密机械研究所
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Abstract

A high pulse repetition frequency mode-locking optical fiber laser comprises a pump laser and a laser resonator, wherein the laser resonator is of an FP (Fabry-Perot) cavity structure. A gain medium and a mode-locking component are positioned between end faces of two optical fiber connectors, a bicolor film is plated on the end face of each optical fiber connector, a gain optical fiber is a phosphate optical fiber doped with rare earth ions, the mode-locking component is grapheme, one end of the laser resonator directly outputs via a laser isolator, the other end of the laser resonator is connected with an output end of a wavelength division multiplexer, an input end of the wavelength division multiplexer is connected with the pump laser, the other output end of the wavelength division multiplexer is connected with the laser isolator to output laser light, and the temperature of the laser resonator is controlled by a temperature control system. The high pulse repetition frequency mode-locking optical fiber laser can generate stable picosecond and even femtosecond without external additional modulation, the repetition frequency is larger than 1GHz ultra-short pulse sequence, and the optical fiber laser is simple in structure and capable of realizing all-fiber integration.

Description

高重频锁模光纤激光器 Mode locked fiber laser with high repetition rate

技术领域 FIELD

[0001 ] 本发明属于激光超短脉冲,特别是一种高重频锁模光纤激光器。 [0001] The present invention belongs to the ultrashort pulse laser, in particular to a mode locked fiber laser with high repetition rate. 背景技术 Background technique

[0002] 高重复频率(简称为高重频)超短脉冲激光器是高速光采样、精确距离测量、精密激光雷达等科研、工业、国防军事应用的关键技术,是激光技术发展的前沿方向之一,也是近来激光器研究领域的一大热点问题。 [0002] The high repetition rate (referred to as a high PRF) ultrashort pulsed laser light is the high-speed sampling, distance measurement accuracy, precision laser radar and other key technology research, industry, national defense and military applications, is one of forward direction of development of laser technology It is also a hot issue recently in the field of laser research. 更高的重复频率意味着更大的纵模间隔。 Higher repetition frequency implies a greater longitudinal mode spacing. GHz以上量级锁模脉冲序列频域上的各阶纵模将能被现有的滤波元件区分,易于实现对单纵模进行强度、相位调制,获得所需要的波形,从而应用在高速光通信系统、激光与物质相互作用、量子动力学控制等领域。 Each order longitudinal mode on the order of GHz or more mode-locked pulse train the frequency domain can distinguish conventional filter element, easy to achieve single longitudinal mode intensity, phase modulation, to obtain the desired waveform, so that high-speed optical communication applications systems, laser-matter interaction, quantum dynamics control and other fields.

[0003] 锁模光纤激光器是实现超短脉冲最有效的方式之一。 [0003] The mode-locked fiber laser is one of the most effective to achieve ultrashort pulse mode. 目前的现有高重频锁模光纤器有主动锁模、被动谐波锁模和超短腔锁模三种方式。 The current conventional mode-locked fiber with high repetition rate has active mode locking, passive mode locking and harmonic mode-locked ultrashort cavity in three ways.

[0004] 主动锁模【参JAL Feng, H. , et al. , Generation of IO-GHz ultra-short pulseswith low time jitter in an actively mode-locked fiber laser.Laser Wrysics,2011. 21 (¾】增加了有源调制器破坏了全光纤结构,更进一步的为了获得高重频和稳定的脉冲序列,需要复杂的高频电路及反馈电路作为支持,加以控制,这将直接导致系统的复杂和昂贵,而且由于电学带宽的限制,脉冲最短只能达到皮秒量级; [0004] [actively mode-locked reference JAL Feng, H., et al., Generation of IO-GHz ultra-short pulseswith low time jitter in an actively mode-locked fiber laser.Laser Wrysics, 2011. 21 (¾] increased the active modulator destroyed all fiber structure, in order to obtain further sequence of pulses and high repetition frequency stability, a complicated high-frequency circuit and a feedback circuit is used as support, to be controlled, which will directly result in complex and expensive systems, and Because of bandwidth limitations electrical pulse can only achieve the minimum picoseconds;

[0005] 采用被动谐波锁模虽可以获得飞秒级脉冲【参见Sobon,G.,et al.,IOGHzpassive harmonic mode-locking in Er-Yb double-clad fiber laser. OpticsCommunications, 2011.284(18)】,但是通常需要很高的泵浦功率来达到高次谐波的目的,又因为不是工作于基频状态,其脉冲的均勻性和稳定性存在一定问题,光纤激光器的结构也通常较为复杂。 [0005] Although passive harmonic mode-locked femtosecond pulse can be obtained [see Sobon, G., et al., IOGHzpassive harmonic mode-locking in Er-Yb double-clad fiber laser. OpticsCommunications, 2011.284 (18)], but typically requires a high pump power to achieve higher harmonics, and because the state is not operating in the fundamental frequency, there are certain problems uniformity and stability of the pulse, the optical fiber laser is also usually more complex.

[0006] 基于短腔结构的高重复频率被动锁模技术不需任何外界的有源调制器件,而且由于腔长较短,基本不用考虑色散问题,激光器结构简单,脉冲质量较稳定,但是其稳态锁模脉冲重复频率取决于腔体长度。 [0006] Based on the high repetition frequency of the passively mode-locked short-cavity structure without any external technical active modulation device, and because the cavity length is short, the basic problem without regard to the dispersion, the laser structure is simple, stable pulse quality, but its stability state mode-locked pulse repetition frequency depends on the length of the cavity.

[0007] 磷酸盐玻璃对稀土离子具有极高的溶解度,而且可忽略团簇效应,随着多组分氧化物玻璃光纤制备技术的发展,国内外均制备出了增益系数达到5dB/cm的铒镱共掺磷酸盐玻璃光纤,在短腔单频光纤激光器中已得到良好的应用。 [0007] phosphate glass has high solubility of rare earth ions, and clusters negligible effect, with the development of multi-component oxide glass fiber preparation technology, home and abroad prepared a gain reaches 5dB / cm of erbium Yb co-doped phosphate glass fiber, short single-frequency fiber laser cavity has been well used. 掺稀土磷酸盐玻璃光纤的增益系数比石英光纤高两个数量级,使其成为研究高重频被动锁模光纤激光器的理想增益介质。 Rare earth-doped phosphate glass fiber gain coefficient than quartz fiber two orders of magnitude higher, making it ideal for passively mode-locked fiber laser gain medium high PRF study.

[0008] 超短腔锁模光纤激光器基本采用磷酸盐光纤作为增益介质,其锁模器件大多采用半导体饱和吸收镜(简称为SESAMs)【参见Byun,H.,et al.,Compact, stabIeIGHz femtosecond Er-doped fiber lasers. Appl. Opt.,2010. 49 09)】,然而SESAMs可调谐范围很窄,而且需要很复杂的生产和包装过程,其散热问题也需特别注意。 [0008] The short mode locked fiber laser cavity substantially a phosphate optical fiber as the gain medium, which is most clamping devices using a semiconductor saturable absorber mirror (abbreviated as SESAMs) [See Byun, H., et al., Compact, stabIeIGHz femtosecond Er -doped fiber lasers. Appl. Opt., 2010. 49 09)], however SESAMs tuning range is very narrow and requires complex production and packaging process, heat dissipation problems requiring special attention. 一种简单而经济的替代方案是采用单壁碳纳米管(简称为SWCNTs) [Yamashita, S.,et al. , 5-GHz pulsed fiber Fabry-Perot laser mode-locked using carbonnanotubes. Photonics Technology Letters, IEEE, 2005. 17(4)】,其工作波长取决于SWCNTs的直径,可调谐范围较窄;如果要获得较大的可调节范围必须采用多种直径的SWCNTs,这将导致非饱和损耗的增大和损伤阈值的减小,从而影响其可饱和吸收作用。 A simple and economical alternative is to use a single-walled carbon nanotubes (abbreviated as SWCNTs) [Yamashita, S., et al., 5-GHz pulsed fiber Fabry-Perot laser mode-locked using carbonnanotubes. Photonics Technology Letters, IEEE , 2005.17 (4)], which is the operating wavelength depends on the diameter of SWCNTs can narrow tuning range; to obtain a larger adjustment range must SWCNTs various diameters, which would lead to increased losses and unsaturated reducing the damage threshold, thus affecting its saturable absorption.

发明内容 SUMMARY

[0009] 针对上述现有技术的不足,本发明的目的在于提供一种高重频锁模激光器,该锁模光纤激光器,具有体积小,系统简单,转化效率高,使用波长范围大,损伤阈值高,产生的超短脉冲输出性能稳定的特点。 [0009] For the above-described deficiencies of the prior art, an object of the present invention is to provide a mode-locked laser with high repetition rate, the mode locked fiber laser, with a small, simple system, the high conversion efficiency, a large wavelength range, damage threshold high stability of the ultrashort pulse generation output performance characteristics.

[0010] 本发明的的技术解决方案如下: [0010] Technical Solution The present invention is as follows:

[0011 ] 一种高重频锁模光纤激光器,包括泵浦激光器和激光谐振腔,其特点在于,所述的激光谐振腔是FP腔结构,增益介质和锁模元件位于两个光纤连接件的端面之间,该光纤连接件的端面镀有双色膜,所述的增益光纤为掺稀土离子的磷酸盐光纤,所述的锁模元件为石墨烯,所述的激光谐振腔的一端经激光隔离器直接输出,该激光谐振腔的另一端接波分复用器的一个输出端,该波分复用器的一个输入端接所述的泵浦激光器,该波分复用器的另一个输出端接激光隔离器输出激光,所述的激光谐振腔的温度由温度控制系统控制。 [0011] A mode-locked fiber laser with high repetition rate, comprising a pump laser and a laser resonator, characterized in that, according to the FP laser resonator cavity, the gain medium and the clamping member located between the two optical fiber connector between the end face of the optical fiber connector end surface coated with color film, the gain fiber is a rare earth ion doped phosphate fiber, the clamping element graphene, one end of the laser resonator by the laser isolation direct outputs, one output terminal of the other end of the WDM laser resonator, an input end of the pump laser the wavelength division multiplexer, the other output of the wavelength division multiplexer termination isolator laser output of the laser, the temperature of the laser resonator is controlled by a temperature control system.

[0012] 所述的增益光纤为掺稀土离子的磷酸盐光纤,其长度的取值范围为l-5cm。 Gain fiber [0012] The phosphate-doped fiber is a rare earth ion, a length in the range of l-5cm.

[0013] 所述的双色膜是具有对所述的激光谐振腔O)的输出激光波段范围高反,对所述的泵浦激光器的泵浦光高透的双色膜;优选激光输出反射率90%,泵浦波段透射率大于95%。 Laser output wavelength range [0013] of the color film having the laser resonator O) is highly reflective, color film of the pump laser pumping light high permeability; preferably laser output reflectivity 90 %, the pump band transmission greater than 95%.

[0014] 所述的锁模元件为石墨烯,该石墨烯采用光诱导吸附或溅射工艺镀于所述的双色膜上获得,或采用成单层石墨烯膜直接贴附在双色膜上制成。 [0014] The clamping element graphene, graphene induced by light adsorption plating or sputtering process to the color film obtained, or to use graphene film is directly attached to the film made of color to make.

[0015] 由泵浦激光器输出的光经过波分复用器和双色膜进入增益光纤,产生的激光在两个双色膜之间谐振,并由锁模元件调制形成超短脉冲可以从两端同时耦合输出。 [0015] Laser light passes through the wavelength division multiplexer and a gain fiber membrane into the color, generated by the output of the pump laser is formed between the two ultrashort pulse color film resonator, modulated by the clamping element may be simultaneously from both ends outcoupling. 所述的隔离器的作用在于防止输出激光反射影响腔内激光的分布和形成。 The role of the separator is to prevent the output of the laser reflector and influence the distribution of the laser cavity is formed.

[0016] 所述温度控制系统的作用是防止激光器长期运转过程中的热积累效应对激光器稳定运行的干扰,同时也保证了激光器工作于最佳温度,获得最大转换效率和最佳稳定的脉冲输出。 [0016] The effect of the temperature control system is to prevent the laser interference thermal accumulation during long-term operation in the stable operation of the laser, but also to ensure the laser operating in the optimum temperature for maximum efficiency and optimum stable pulse output .

[0017] 所述的增益光纤为掺稀土离子的磷酸盐光纤,长度l-5cm可调,重复频率可达2-IOGHz ο Gain fiber [0017] The phosphate-doped fiber is a rare earth ion, l-5cm length adjustable repetition rate up to 2-IOGHz ο

[0018] 所述隔离器为激光输出波段隔离器。 [0018] The separator is a separator band laser output.

[0019] 本发明具有以下有益效果: [0019] The present invention has the following advantages:

[0020] 1、近几年来对石墨烯的研究发现,基于石墨烯的饱和吸收体具有超短的恢复时间,较低的饱和阈值和非饱和损耗。 [0020] 1, in recent years the study of graphene found that a short recovery time based on a saturable absorber graphene lower saturation threshold and unsaturated losses. 与SWCNTs的小半径和大表面张力不同,石墨烯由于独特的二维结构,其表面张力很小,具有比SWCNTs更高的损伤阈值。 With small radius and the large surface tension different from SWCNTs, the two-dimensional graphene because of the unique structure of the surface tension is small, having a threshold higher than SWCNTs damage. 与不同管壁直径SWCNTs 的波长选择性相比,石墨烯在宽范围内具有平坦的透过率,可用于大范围波长内的锁模。 Compared to the wavelength selectivity of different wall diameters of SWCNTs, graphene having flat transmittance over a wide range, mode locking can be used within a large wavelength range. 因此,基于石墨烯锁模的超短光脉冲产生技术更有发展前景和应用价值。 Therefore, based on graphene mode-locked ultrashort optical pulse generation technology more development prospects and value.

[0021] 2、本发明基于石墨烯的高重频锁模光纤激光器,是将掺稀土磷酸盐光纤置于陶瓷插针与普通光纤连接器对接,并利用石墨烯作为饱和吸收体,产生超短脉冲的被动锁模光纤激光器,结构简单,性能稳定,是一种很有潜力的高重频超短脉冲产生载体,具有广泛的应用前景。 [0021] 2, the present invention is based on graphene with high repetition rate mode-locked fiber laser, the rare earth-doped phosphate fiber is placed in a ceramic pin mated with the ordinary optical fiber connector, and the use of graphene as a saturable absorber, ultrashort passively mode-locked fiber laser pulses, simple structure, stable performance, is a promising pulse generation with high repetition rate ultrashort carrier, has a broad application prospect. [0022] 3、与传统的基于主动锁模高重频锁模光纤激光器采用有源调制器和长环形腔比较,本发明无需任何有源调制器,即无需复杂的电路反馈系统对其进行控制,故系统结构简单;而且本发明具有体积小,结构简单,系统简洁的特点; [0022] 3, based on the traditional actively mode-locked fiber laser with high repetition rate mode-locked using active modulators and long annular chamber comparison, the present invention does not require any active modulator, i.e. without complicated feedback system gain control circuit , so the system structure is simple; and the present invention has a small volume, simple structure, simple system characteristics;

[0023] 4、与被动谐波锁模的高重频锁模光纤激光器复杂的腔体结构和长环形腔比较,本发明的腔体结构十分简单,调整方便;而且本发明工作于基频状态,激光输出更稳定。 [0023] The mode-locked fiber laser with high repetition rate cavity structure 4 complex, and passive mode locking and harmonic comparison long annular chamber, a cavity structure of the present invention is simple, easy to adjust; and working state of the present invention is the fundamental frequency , the laser output is more stable.

[0024] 5、目前已有的超短腔锁模光纤激光器,主要采用半导体饱和吸收镜(SESAMs)和单壁碳纳米管(SWCNTs)作为锁模元件,与半导体饱和吸收镜(SESAMs)和单壁碳纳米管(SffCNTs)相比,本发明的锁模元件易制备,成本低,波长调谐范围大,非饱和损耗小,损伤阈值大的特点。 [0024] 5, there are ultra-short cavity mode-locked fiber laser, a semiconductor saturable absorber mirror main (SESAMs) and single-walled carbon nanotubes (SWCNTs) as a clamping element, and the semiconductor saturable absorber mirrors (SESAMs) and single walled carbon nanotubes (SffCNTs) compared clamping element according to the present invention can easily be produced, low cost, large wavelength tuning range, little loss unsaturated, large damage threshold value characteristics.

[0025] 6、实验表明,本发明不需要外界附加调制即可产生稳定的皮秒乃至飞秒量级,重复频率大于IGHz的超短脉冲序列,结构简单,可实现全光纤集成。 [0025] 6, experiments show that the present invention does not require an additional external modulator to generate a stable and even picosecond femtosecond, ultrashort pulse sequence repetition rate greater than IGHz simple structure, the optical fiber can achieve full integration.

附图说明 BRIEF DESCRIPTION

[0026] 图1是本发明高重频锁模光纤激光器的结构图 [0026] FIG. 1 is a block diagram of the present invention, high-repetition-rate mode-locked fiber laser

[0027] 图2是本发明高重频锁模光纤激光器的谐振腔的结构图 [0027] FIG. 2 is a block diagram of the present invention is a high mode-locked fiber laser repetition frequency of the resonator

具体实施方式 Detailed ways

[0028] 下面结合实施例对本发明作进一步说明,但不应以此限制本发明的保护范围。 [0028] The following embodiments in conjunction with embodiments of the present invention is further illustrated, but should not be used to limit the scope of the present invention.

[0029] 本发明高重频锁模光纤激光器的结构如图1所示。 [0029] The present invention with high repetition rate mode-locked fiber laser shown in Figure 1. 由图可见,本发明高重频锁模光纤激光器,包括泵浦激光器7和激光谐振腔2,所述的激光谐振腔2是FP腔结构,增益介质11和锁模元件10位于两个光纤连接件8的端面之间,该光纤连接件的端面镀有双色膜9,所述的增益光纤11为掺稀土离子的磷酸盐光纤,所述的锁模元件10为石墨烯,所述的激光谐振腔2的一端经激光隔离器1输出,该激光谐振腔2的另一端接波分复用器5的一个输出端,该波分复用器5的输入端接所述的泵浦激光器7,该波分复用器5的另一个输出端经激光隔离器1输出激光,所述的激光谐振腔2的温度由温度控制系统控制,该温度控制系统由热敏电阻4和半导体致冷器5及其温控电路6组成,保证激光器工作于最佳温度。 FIG seen, the present invention is mode locked fiber laser with high repetition rate, comprising a pump laser and a laser resonator 7 2, 2 according to the FP laser resonator cavity, the gain medium 11 and the clamping member 10 located between the two optical fiber connector between the end surface 8 of the optical fiber connector end surface 9 coated with a color film, said gain fiber 11 to an optical fiber doped with rare earth ions of phosphate, the clamping element 10 graphene said laser resonator 2 via the output end of the laser cavity isolator 1, an output terminal of the other end of the laser cavity wavelength division 2 of 5, the input end of the pump laser 7, the wavelength division multiplexer 5, another output of the wavelength division multiplexer 5 the output of the laser via laser isolator 1, the temperature of the laser cavity 2 is controlled by a temperature control system, the temperature control system by the thermistor and the thermoelectric cooler 5 4 composition and temperature control circuit 6, to ensure optimum laser operating temperature.

[0030] 所述的增益光纤11为掺稀土离子的磷酸盐光纤,其长度的取值范围为l-5cm。 Gain fiber [0030] The optical fiber 11 is a rare earth-doped phosphate ions in the range of its length is l-5cm.

[0031] 所述的双色膜9是具有对所述的激光谐振腔2的输出激光波段范围高反,对所述的泵浦激光器7的泵浦光高透的双色膜;优选激光输出反射率90%,泵浦波段透射率大于95%。 [0031] The dichroic film 9 having a high output of the laser 2 for anti-band range of the laser cavity, the pump 7 light color film of high permeability of the pump laser; preferably laser output reflectivity 90%, the pump band transmission greater than 95%.

[0032] 所述的锁模元件10为石墨烯,该石墨烯采用光诱导吸附或溅射工艺镀于所述的双色膜9上获得,或采用成单层石墨烯膜直接贴附在双色膜9上制成。 [0032] clamping element 10 of the graphene, graphene induced by light adsorption plating or sputtering process to color the film 9 obtained as a monolayer film or a two-color film is directly adhered graphene made on 9.

[0033] 一个实施例的具体参数如下:所述的泵浦激光器7,使用980nm单模半导体激光器,输出功率200-600mW可选;所述的隔离器1采用1550nm波段偏振无关光隔离器;所述的激光谐振腔2是用铜质封装盒子加以封装的;所述的波分复用器3是采用熔融拉锥型980/1550nm波分复用耦合器,4、5、6分别是热敏电阻,半导体制冷器(TECs)和温控电路板及电源,构成温度控制系统,这是一般的现有技术恕我在此不再赘述。 Specific parameters [0033] An embodiment is as follows: the pump laser 7, using 980nm single mode semiconductor laser, the output power 200-600mW optional; the 1550nm band isolator 1 using polarization independent optical isolator; the said laser resonator 2 is to be encapsulated with copper package box; the wavelength division multiplexer 3 is the use of fused biconical taper 980 / 1550nm WDM coupler, respectively 4,5,6 thermosensitive resistors, semiconductor refrigerator (the TECs) and the temperature control circuit board and the power supply, temperature control system configuration, which is the normal prior art, if I is not repeated herein.

[0034] 其中,980nm半导体激光器7发出的激光经波分复用器3进入激光谐振腔2,该激光谐振腔2输出的激光经隔离器1输出,隔离器1隔离了反射激光,确保了激光腔内的光场不受影响。 [0034] wherein the laser via a wavelength division multiplexer 980nm emitted from the semiconductor laser 7 3 2 enters the laser cavity, a laser output outputted from the laser resonator through the isolator, the isolator 1 of the reflected laser isolation, to ensure that the laser cavity optical field is not affected. 调整激光器至最佳状态,铜质盒子的封装保证激光腔不受外界空气振动等影响。 Adjusted to the optimum state lasers, copper box packaging to ensure the laser cavity is not affected by vibration or the like outside air. 热敏电阻4、半导体制冷器(TECs) 5和温控电路板6及开关组成温控反馈系统,保证激光器运行在最佳温度状态,减小外界温度对其影响及激光器长时间运转的热积累效应的影响。 Thermistor 4, a semiconductor cooler (TECs) 5 and a temperature control circuit board 6 and a switch consisting of temperature control feedback system to ensure the optimum operating temperature state laser, heat accumulation is reduced and the laser ambient temperature on the long-time operation Effects eFFECT. 因此整个激光器启动后,当泵浦功率超过锁模阈值时,基本处于稳定运行状态。 Thus the entire laser starts, when the pump power exceeds the mode-locking threshold value, the basic operation is in a stable state.

[0035] 图2给出本发明高重频锁模光纤激光器腔的结构示意图。 [0035] Figure 2 shows a schematic view of the structure of the present invention, mode-locked high repetition frequency fiber laser cavity. 图2中,10为石墨烯膜; 8为1060光纤的PC/FC光纤连接器,9是1550nm波段90%反射率,980nm波段大于95%的透射率的薄膜9 ;11为Icm铒镱共掺的磷酸盐光纤;因此获得的腔长约1cm,可获得重复频率为IOGHz的超短脉冲序列。 In FIG 2, 10 is a graphene film; 8 1060 fiber PC / FC optical fiber connector, 9 is a 1550nm band of 90% reflectance, 980nm band greater than 95% of film transmittance 9; 11 Icm Er-Yb co-doped phosphate fibers; thus obtained cavity about 1cm, obtained ultrashort pulse repetition frequency of a sequence IOGHz.

[0036] 基于石墨烯的高重频锁模光纤激光器腔由表面镀有激光波长双色膜9的FC/PC光纤连接器8作为谐振腔镜,构成FP腔;其中一端连接头8在双色膜9表面利用光诱导吸附的方法,控制光功率和时间,从石墨烯DMF溶液中吸附单层石墨烯片,并烘干,获得锁模元件10 ;铒镱共掺磷酸盐光纤11将其置于标准陶瓷插针中固定。 [0036] with high repetition rate mode-locked fiber laser cavity from the surface of the graphene-based plated with FC-color laser wavelength film 9 / PC optical fiber connector 8 as resonator mirrors constituting the FP cavity; wherein one end of the connector 8 in the color film 9 using light-induced surface adsorption methods, the control light power and time, adsorption graphene sheets from the graphene in DMF, and dried to obtain a clamping element 10; Er-Yb doped phosphate fiber will be placed in a standard 11 ceramic pin fixed. 三者组合拼接并封装,可获得图1中的激光谐振腔2。 Splicing and package combination of the three, can be obtained in a laser resonator 2 of FIG.

[0037] 实验表明,本发明不需要外界附加调制即可产生稳定的皮秒乃至飞秒量级,重复频率大于IGHz的超短脉冲序列,结构简单,可实现全光纤集成。 [0037] The experiment shows that the present invention does not require an additional external modulator to generate a stable and even picosecond femtosecond, repetition rate ultrashort pulse sequence greater than IGHz, simple structure, the optical fiber can achieve full integration.

Claims (4)

1. 一种高重频锁模光纤激光器,包括泵浦激光器(7)和激光谐振腔O),其特征在于, 所述的激光谐振腔(2)是FP腔结构,增益介质(11)和锁模元件(10)位于两个光纤连接件(8)的端面之间,该光纤连接件的端面镀有双色膜(9),所述的增益光纤(11)为掺稀土离子的磷酸盐光纤,所述的锁模元件(10)为石墨烯,所述的激光谐振腔O)的一端经激光隔离器(1)输出,该激光谐振腔(¾的输入端接波分复用器(¾的一个输出端,该波分复用器(5)的输入端接所述的泵浦激光器(7),该波分复用器(¾的另一个输出端经激光隔离器(1)输出激光,所述的激光谐振腔O)的温度由温度控制系统控制,该温度控制系统由热敏电阻(4)和半导体致冷器(¾及其温控电路(6)组成,保证激光器工作于最佳温度。 A mode-locked fiber laser with high repetition rate, comprising a pump laser (7) and the laser resonator O), wherein said laser resonator (2) is an FP cavity, a gain medium (11) and clamping element (10) is located between the two end faces of the optical fiber connector (8), the end face of the optical fiber connector is plated with a color film (9), said gain fiber (11) is a rare earth ion doped optical fiber phosphate one end of said clamping element (10) of graphene, the laser resonator O) (1) outputs the laser separator, the laser cavity (¾ input termination wavelength division multiplexer (¾ an output terminal, the wavelength division multiplexer (5) of the pump laser input terminal (7), the wavelength division multiplexer (¾ other output terminal of the laser-isolator (1) outputs a laser said laser resonator O) is temperature controlled by a temperature control system, the temperature control system by the thermistor (4) and the thermoelectric cooler (¾ and temperature control circuit (6), with the most work to ensure that the laser good temperature.
2.根据权利要求1所述的高重频锁模光纤激光器,其特征在于所述的掺稀土离子的磷酸盐光纤的长度的取值范围为l-5cm。 According to claim mode locked fiber laser with high repetition rate to claim 1, characterized in that the value range of the length of the rare earth ions doped phosphate fiber is l-5cm.
3.根据权利要求1所述的高重频锁模光纤激光器,其特征在于所述的双色膜(9)是具有对所述的激光谐振腔O)的输出激光波段范围高反,对所述的泵浦激光器(7)的泵浦光高透的双色膜;优选激光输出反射率90%,泵浦波段透射率大于95%。 Output of the laser according to claim wavelength range with high repetition rate mode-locked fiber laser of claim 1, wherein said dichroic film (9) having the laser resonator O) is highly reflective, the pump laser color film (7) of the pump light of high permeability; preferably 90% reflectance of the laser output, the pump band transmission greater than 95%.
4.根据权利要求1所述的高重频锁模光纤激光器,其特征在于所述的石墨烯采用光诱导吸附或溅射工艺镀于所述的双色膜(9)上获得,或采用成单层石墨烯膜直接贴附在双色膜(9)上制成。 The mode-locked fiber laser with high repetition rate according to claim 1, wherein said graphene adsorption or by light induced plating on the sputtering process color film according to (9) obtained as a single use, or graphene film layer directly adhered to the color film (9) is made.
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
US10315274B2 (en) 2011-09-20 2019-06-11 Nlight, Inc. Laser marking method and system and laser marked object
CN103606803A (en) * 2013-11-07 2014-02-26 北京工业大学 Fiber cladding light stripper for high-power fiber laser
CN106921107A (en) * 2015-12-28 2017-07-04 恩耐公司 The individual pulse of the fully controllable burst shaping from psec optical fiber laser
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