CN100581010C - Single mode output laser for spiral coupling active doping optical fibre stick - Google Patents

Single mode output laser for spiral coupling active doping optical fibre stick Download PDF

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CN100581010C
CN100581010C CN 200810118083 CN200810118083A CN100581010C CN 100581010 C CN100581010 C CN 100581010C CN 200810118083 CN200810118083 CN 200810118083 CN 200810118083 A CN200810118083 A CN 200810118083A CN 100581010 C CN100581010 C CN 100581010C
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fiber
rare earth
rod
doped fiber
laser
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CN 200810118083
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CN101350491A (en
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楚 刘
宁提纲
帆 张
王春灿
胡旭东
丽 裴
谭中伟
乂 阮
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北京交通大学
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Abstract

The invention discloses a spiral coupling rare-earth-doped optical-fiber rod single-mode output LASER, comprising a pumping source (1) and a pumping source (2), a single-mode rare-earth-doped optical-fiber (6) and a rare-earth-doped optical-fiber rod. The pumping source (1) pumps the LASER composed of a fiber grating (71), a fiber grating (72) and the single-mode rare-earth-doped optical fiber (6); the pumping source (2) pumps the rare-earth-doped optical-fiber rod, and the fiber grating (71), the fiber grating (72) and the single-mode rare-earth-doped optical-fiber (6) are connected, and placed in the spiral groove prepared on a rare-earth-doped optical-fiber coating (3), wherein, the partial or complete coating of the fiber grating and single-mode rare-earth-doped optical-fiber placed in the groove is removed, and the groove is encapsulated. The two end faces of the rare-earth-doped rod is treated smooth, and by internal strong coupling, the resonance of rare-earth-doped optical-fiber rod realizes active phase-lock on the laser-wave length generated by the LASER composed of the optical-fiber grating and the single-mode rare-earth-doped optical fiber, thereby, single-mode laser ultra-brightness power output is realized.

Description

螺旋耦合有源掺杂光纤棒单模输出激光器 The active coil is coupled single-mode doped fiber laser rod

技术领域 FIELD

本发明涉及一种高功率光纤激光器,特别是一种螺旋耦合有源掺杂光纤棒单模输出激光器。 The present invention relates to a high-power fiber lasers, particularly active in a spiral rod coupling single-mode doped fiber laser.

背景技术 Background technique

光纤激光器以其卓越的性能和低廉的价格,在光纤通信、工业加工、医疗、 军事等领域取得了日益广泛的应用。 Fiber laser for its superior performance and low price, has made increasingly widely used in optical fiber communications, industrial processing, medical, military and other fields. 尽管在实验室已经实现单个光纤输出超过 Although the laboratory has been implemented over a single optical output

lkW的单模激光,而且实现这种激光需要严格的条件,难以工程应用;但是随着激光技术应用的发展,以及材料加工、空间通信、激光雷达、光电对抗、激光武器等的发展,需要高功率、高质量、高强度和超亮度的激光,要求单模输出功率达到MW甚至GW量级。 LkW single-mode laser, and laser to achieve this requires strict conditions, it is difficult engineering applications; but with the development of laser technology, and the development of materials processing, space communications, laser radar, optoelectronic countermeasures, laser weapons, etc., require high power, high-quality, high-strength and ultra-brightness laser, a single mode output power requires MW and GW magnitude. 仅仅采用单模掺稀土纤芯的双包层掺稀土光纤激光器,由于单模掺稀土纤的芯径小于10pm,受到非线性、结构因素和衍射极限的限制,承受的光功率密度有限,单模掺稀土光纤激光器的单模掺稀土光纤连续波损坏阈值约lW/zmi2[J. Nilsson, JK Sahu, Y. Jeong, WA Clarkson, R. Selvas, AB Grudinin, and SU Alam, "High Power Fiber Lasers:New Developments",Proceedings of SPIE Vol.4974,50-59(2003)],其光学损坏危险成为实现大功率单模光纤激光器的一大挑战。 Only double-clad single mode rare earth doped rare earth-doped core optical fiber laser, since the rare earth doped single-mode fiber core diameter is less than 10 pM, restricted nonlinear structural factors and the diffraction limit, receiving optical power density is limited, single-mode rare earth-doped fiber laser continuous wave single mode rare earth doped fiber damage threshold of about lW / zmi2 [J Nilsson, JK Sahu, Y. Jeong, WA Clarkson, R. Selvas, AB Grudinin, and SU Alam, "High Power fiber lasers.: new Developments ", Proceedings of SPIE Vol.4974,50-59 (2003)], which becomes a risk of damage to the optical challenge with high power single mode fiber laser. 除了光学损坏外,由于大功率光产生^ 的热也会损坏光纤,甚至会最终融化纤芯。 In addition to optical damage due to high-power light generated heat can damage ^ fibers, or even the final core melt. 有文献报道,铒镱共掺光纤激光器每米可产生100W热[J. Nilsson, SU Alam, JA Alvarez-Chavez, PW Turner, WA Clarkson, andA .B .Grudinin, "High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber laser", IEEE J.Quantum Electron.39,987画994(2003)]。 Has been reported, Er-Yb co-doped fiber laser can produce 100W heat per meter [J. Nilsson, SU Alam, JA Alvarez-Chavez, PW Turner, WA Clarkson, andA .B .Grudinin, "High-power and tunable operation of erbium -ytterbium co-doped cladding-pumped fiber laser ", IEEE J.Quantum Electron.39,987 painting 994 (2003)].

另一方面,在一般双包层光纤中,由于单模位于多模内包层的中心,对单模纤芯很难写入光栅以构成光学谐振腔,泵浦光耦合到双包层光纤中效率低。 On the other hand, in the double-clad fiber in general, since a single mode in the center of the multimode inner cladding, it is difficult to write gratings in single-mode core constituting an optical resonator, the pump light is coupled to the dual clad fiber efficiency low. 发明内容为了克服已有的传统双包层单模光纤激光器的输出单模激光功率有限以及随着光功率的增加,其输出光束质量变差,抗热差,以及传统双包层单模光纤激光器单模纤芯写入光栅难度大,泵浦光耦合到双包层光纤中效率低的缺点, 本发明提供一种螺旋耦合有源掺杂光纤棒单模输出激光器,以实现大功率超亮度单模激光输出。 SUMMARY OF THE INVENTION To overcome the existing conventional double-clad single-mode fiber laser limited single-mode laser output power, and with the increase in the optical power, the output beam quality deteriorates, the difference between heat and the conventional double-clad single-mode fiber laser single-mode core is difficult to write the grating, the pump light coupled to the low efficiency of the double-clad fiber drawbacks, the present invention provides an active doped fiber coupling rod spiral single mode output laser to achieve ultra-high power single luminance mode laser output. 这种光纤激光器具有制作设备简单,工艺简易、制作简单与成本低,且泵浦光耦合到掺稀土光纤棒的效率高的优点。 Such a fiber laser has a simple production equipment, simple process, low in cost and simple production, and the pump light is coupled to the advantage of high efficiency of rare earth-doped fiber rod. 本发明的目的是通过以下技术方案实现的:一种螺旋耦合有源掺杂光纤棒单模输出激光器,它,括两个泵浦源、单模掺稀土光纤、掺稀土光纤棒;其中一个泵浦源对两个光纤光栅与单模掺稀土光纤构成的激光器进行泵浦;另一个泵浦源对掺稀土光纤棒进行泵浦,将两个光纤光栅与单模掺稀土光纤连接在一起,置入在掺稀土光纤棒包层上刻的螺旋槽内,其中置入槽内的光纤光栅、单模掺稀土光纤部分或全部包层去掉,并对槽进行封装。 Object of the present invention is achieved by the following technical solutions: A spiral-doped fiber coupled to the active single mode output of the laser rod, it includes two pump sources, single mode rare earth doped fiber, rare earth-doped fiber rod; wherein a pump Pu source of two fiber grating laser with a single mode rare earth-doped fiber pumped configuration; other rare earth doped fiber pumping source for pumping rods, the two single-mode optical fiber grating and the rare earth doped fiber are connected together, is set carved into the rare earth doped fiber in the spiral groove rod cladding, wherein the fiber into the groove of the grating, a single mode rare earth doped fiber portion or all of the cladding is removed, and the groove encapsulation. 在掺稀土光纤棒包层上刻的螺旋槽,槽的底端面与掺稀土光纤棒芯中心的距离小于掺稀土光纤棒的1/2芯径+5)im。 Engraved on the rare earth-doped fiber rod cladding spiral groove, the bottom surface of the rod from the rare earth doped fiber core center of the groove is less than 1/2 of the rare earth doped fiber core diameter rod +5) im. 在掺稀土光纤棒包层上刻的螺旋槽的形状为V字形、凹字形或任意形状, 槽或贯穿整个光纤棒或存在于掺稀土光纤棒的一部分长度上。 Shape engraved in the rare earth-doped fiber rod cladding spiral groove is V-shaped, any shape or concave shape, groove or a through portion of the length of the entire fiber rod or rods present in the rare earth doped fiber. 本发明的有益效果具体如下:所述螺旋耦合有源掺杂光纤棒单模输出激光器不需要外部调相装置,通过内部强耦合,由于掺稀土光纤棒与单模掺稀土光纤掺杂的稀土离子相同,从而光纤光栅、单模掺稀土光纤构成的激光腔的发生波长在掺稀土离子光纤棒的发射谱范围内,使掺稀土光纤棒芯层谐振在光纤光栅、单模掺稀土光纤构成的激光器产生的激光波长上,实现主动锁相,从而实现单模激光超亮度放大输出。 Advantageous effects of the present invention is as follows: the external helical phasing means coupled to the active fiber doped single mode output laser rod not required, by an internal strong coupling, since the rare earth-doped single mode optical fiber rod rare earth doped fiber doped with rare earth ions same, whereby a fiber grating, a single mode rare earth-doped fiber laser cavity configuration occurs in the wavelength range of the emission spectrum of the rare earth ion doped fiber rod, so that rare earth doped fiber core rod in fiber grating resonator, the laser rare earth-doped single mode optical fiber composed of the laser wavelength generated, for active phase lock, so that single mode laser ultra amplified output luminance. 螺旋耦合有源掺杂光纤棒单模输出激光器,由于掺稀土光纤棒芯层散热面积大,输出较高的功率,又由于掺稀土光纤棒芯层实际上是一种光放大器,比单独使用单模掺稀土纤芯单模种子光纤激光器输出高万倍的功率,同时,由于掺稀土光纤棒芯层谐振在光纤光栅与单模掺稀土光纤构成的激光腔产生的激光波长上,使得这种激光器不会降低输出激光的质量,同时实现了单模激光超亮度大功率输出。 The helical rod-doped fiber coupled to the active single mode laser output, since the rare earth doped fiber core rod dissipation area, higher output power, and because the rare earth doped fiber core rod actually is an optical amplifier, used alone than single mode rare earth doped fiber core of a single-mode seed laser output power of the high times, at the same time, since the wavelength of the laser light rare earth doped fiber core rod resonant cavity rare-earth-doped fiber laser configured to produce a single-mode fiber and grating, so that such a laser It does not reduce the quality of the laser output, while achieving ultra-bright single-mode laser output power. 附图说明图l为实施方式一的螺旋耦合有源掺杂光纤棒单模输出激光器示意图。 FIG. L single-mode optical fiber rod laser is a schematic embodiment of a helical coupling active dopant. 图2为实施方式二的螺旋耦合有源掺杂光纤棒单模输出激光器示意图。 FIG 2 is a schematic diagram of a single-mode output fiber laser rod coupling coil embodiment two active doped. 图3为实施方式三的螺旋耦合有源掺杂光纤棒单模输出激光器示意图。 3 is a schematic view of a single-mode output fiber laser rod coupling coil embodiment three active dopant. 图4为实施方式四的螺旋耦合有源掺杂光纤棒单模输出激光器示意图。 FIG 4 is a schematic diagram of a single-mode output fiber laser rod fourth embodiment of the coil coupling active dopant. 具体实施方式下面结合附图对本发明作进一步描述。 DRAWINGS The invention will be further described below with reference to specific embodiments. 实施例一本实施例参见图1,采用的掺稀土光纤棒与单模掺稀土光纤掺杂离子均为铒离子,详细描述如下:单模掺稀土光纤6的芯径为5pm,掺稀土光纤棒芯4的芯径为lmm。 Embodiment 1 This embodiment Referring to Figure 1 embodiment, using the rare earth-doped single mode optical fiber rod with the rare earth doped fiber doped with erbium ions are described in detail as follows: a single mode rare earth-doped core optical fiber 6 5PM, diameter, rare earth doped fiber rod core diameter of the core 4 lmm. 掺稀土光纤棒长度为10m,单模掺稀土光纤6长度为10m。 Rare earth doped fiber rod length of 10m, a length of single mode rare earth doped fiber 6 is 10m. 单模掺稀土光纤6的两端连接光纤光栅71与光纤光栅72;用泵浦源1对单模掺稀土光纤6及光纤光栅71与光纤光栅72构成的激光器进行泵浦。 Rare-earth-doped single mode optical fiber 6 is connected to both ends of the fiber grating 71 and the fiber grating 72; 71 and laser-pumped fiber grating rare earth doped fiber 72 and the fiber grating 6 with one pair of single-mode pump source. 在掺稀土光纤棒3的包层上,刻V形螺旋槽,螺距为8m, V形螺旋槽贯穿整个掺稀土光纤棒,只有1个螺纹,V形螺旋槽的底端面与掺稀土光纤棒芯4中心的距离小于掺稀土光纤棒的1/2芯径+5pm。 On the clad layer rare earth-doped fiber rod 3, cut V-shaped spiral groove, pitch of 8M, V shaped spiral grooves throughout the rare earth-doped fiber rod, only one thread, the bottom surface of the V-shaped spiral grooves and rare earth doped fiber cob 4 from the center of the rod is less than 1/2 of rare earth doped fiber core diameter + 5pm. 将光纤光栅71、单模掺稀土光纤6与光纤光栅72置入V形螺旋槽内,其中置入V形螺旋槽内光纤光栅71、单模掺稀土光纤6与光纤光栅72的部分或全部包层用氢氟酸腐蚀掉,放置方向为光纤光栅71、单模掺稀土光纤6与光纤光栅72腐蚀掉包层的部分朝向掺稀土光纤棒;然后采用光学胶对V形槽进行封装。 The fiber grating 71, the single-mode optical fiber 6 and the rare earth-doped fiber grating 72 into a V-shaped spiral groove, wherein the spiral groove into the V-shaped fiber grating 71, the single mode rare earth doped fiber portion 6 and the fiber grating 72 or all of the packet layer was etched away with hydrofluoric acid, placement direction of the fiber grating 71, the single mode rare earth doped fiber portion 6 and the fiber grating layer etching substitution rare earth doped fiber 72 towards the rod; then using an optical plastic encapsulation of V-shaped grooves. 对掺稀土光纤棒一端镀对应激光波长的高反射膜5,用泵浦源2对掺稀土光纤棒进行端面泵浦,对掺稀土光纤棒的另一端光滑处理,螺旋耦合有源掺杂光纤棒单模输出激光器的激光从掺稀土光纤棒的光滑端输出。 Of rare earth doped fiber laser wavelength corresponding to the rod end of plated high reflection film 5, a pump source 2 with end-pumped rare earth doped fiber on the rod, the other end of the rare earth doped fiber rod smoothing process, an active doped fiber coil coupling rod a single mode laser output of the laser output from the rare earth-doped fiber rod smooth end. 实施例二本实施例参见图2,采用的掺稀土光纤棒与单模掺稀土光纤掺杂离子均为镱离子,详细描述如下:单模掺稀土光纤6的芯径为6pm,掺稀土光纤棒芯4芯径为5mm。 Second Embodiment This embodiment Referring to FIG. 2 embodiment, the use of rare earth-doped single mode optical fiber rod with the rare earth doped fiber doped with ytterbium ions are described in detail as follows: a single mode rare earth-doped core optical fiber 6 to 6pm diameter, rare earth doped fiber rod core diameter is 5mm core 4. 掺稀土光纤棒长度为5m,单模掺稀土光纤6长度为7m。 Rare earth doped fiber rod length of 5m, single mode rare earth doped fiber length of 6 7m. 在单模掺稀土光纤6两端连接上光纤光栅71与光纤光栅72,用泵浦源1对单模掺稀土光纤6及光纤光栅71与光纤光栅72构成的激光器进行泵浦。 Single mode rare earth doped fiber 6 is connected to both ends of the fiber grating 71 and the fiber grating 72, rare earth doped fiber and fiber grating 6 with one pair of single-mode pump source 71 and the laser-pumped fiber grating 72. 在掺稀土光纤棒3的包层上,刻V形螺旋槽,螺距约为3m,只有2个螺纹, 槽的底端面与掺稀土光纤棒中心的距离小于掺稀土光纤棒芯的1/2芯径+3,。 On rare earth doped fiber rod cladding layer 3, the V-shaped cut helical groove pitch of approximately 3m, only two threads, with the bottom end face from the center of the rare earth-doped fiber rod groove is less than 1/2 of a core doped rare-earth fiber core rod diameter +3 ,. 将光纤光栅71与光纤光栅72、单模掺稀土光纤6置入V形螺旋槽内,其中置入V形螺旋槽内的光纤光栅71、单模掺稀土光纤6与光纤光栅72的部分或全部包层用研磨法去掉,放置方向为光纤光栅71、单模掺稀土光纤6与光纤光栅72去掉包层的部分朝向摻稀土光纤棒芯4;然后填充与掺稀土光纤棒包层6相同材质的材料,并采用热处理法对V形螺旋槽进行封装。 The fiber grating 71 and the fiber grating 72, the single mode rare earth doped fiber into the V-shaped spiral grooves 6, wherein the spiral groove into V-shaped fiber grating 71, the single-mode optical fiber grating portion 6 of the rare earth doped fiber 72 or all cladding layer is removed by polishing, is placed in the direction of the fiber grating 71, the single-mode optical fiber 6 and the rare earth-doped fiber grating 72 toward the cladding to remove part of rare earth doped fiber core rod 4; then filled with the rare earth-doped fiber rod cladding layer 6 of the same material material, and the helical groove of the V-shaped encapsulating heat treatment method. 对掺稀土光纤棒一端镀对应激光波长的高反射膜5,用泵浦源2对掺稀土光纤棒进行端面泵浦,在掺稀土光纤棒的另一端光滑处理,螺旋耦合有源掺杂光纤棒单模输出激光器的激光从掺稀土光纤棒光滑处理的一端输出。 Of rare earth doped fiber laser wavelength corresponding to the rod end of plated high reflection film 5, a pump source 2 with end-pumped rare earth doped fiber on the rod, the other end of the smoothing process in the rare earth doped fiber rods, helical active doped fiber coupling rod a single mode laser output of the laser from one end of the rare-earth-doped optical fiber rod smoothed output. 实施例三本实施例参见图3,采用的掺稀土光纤棒与单模掺稀土光纤掺杂离子均为钍6离子,详细描述如下:单模掺稀土光纤芯径为7pm,掺稀土光纤棒芯4的芯径为10mm。 Embodiment 3 This embodiment Referring to FIG. 3 embodiment, using the rare earth-doped single mode optical fiber rod with the rare earth doped fiber doped thorium ions are ion-6, described in detail as follows: a single mode rare earth doped fiber core diameter of 7pm, rare earth doped fiber core rod 4 to 10mm core diameter. 掺稀土光纤棒长度为lm,单模掺稀土光纤6长度为2m。 Rod length of rare earth doped fiber lm, 6 single mode rare earth doped fiber length 2m. 在单模掺稀土光纤6两端接入光纤光栅71与光纤光栅72,用泵浦源i对单模掺稀土光纤6及光纤光栅71与光纤光栅72构成的激光器进行泵浦。 Single mode rare earth doped fiber 6 ends the access fiber grating 71 and fiber grating 72, a pumping source for pumping the laser 71 I fiber grating 72 constituting the rare earth-doped single-mode optical fiber 6 and the optical fiber grating. 在掺稀土光纤棒3的包层上,刻V形螺旋槽,螺距约为20cm,有4个螺纹, 槽的底端面与掺稀土光纤棒中心的距离小于掺稀土光纤棒的1/2芯径+lpm。 On rare earth doped fiber rod cladding layer 3, the V-shaped cut helical groove pitch is about 20cm, with four threads, and the bottom end face from the center of the rare earth-doped fiber rod groove is less than 1/2 of rare earth doped fiber core diameter of the rod + lpm. 将光纤光栅71与单模掺稀土光纤6置入V形螺旋槽内,其中置入V形螺旋槽内的光纤光栅71与单模掺稀土光纤6的部分或全部包层用氢氟酸腐蚀掉, 放置方向为光纤光栅71、单模掺稀土光纤6腐蚀掉包层的部分朝向掺稀土光纤棒芯4;然后采用光学胶对V形螺旋槽进行封装。 The fiber grating 71 with a single mode rare earth doped fiber into the V-shaped spiral groove 6, a part or all of the cladding 6, wherein the rare-earth fiber coil into the V-shaped groove 71 with a single mode fiber grating etched away with hydrofluoric acid mixed , placement direction of the fiber grating 71, the single mode rare earth doped fiber layer 6 portion toward corrosion substitution rare earth doped fiber core rod 4; then, using an optical adhesive to the V-shaped spiral groove encapsulated. 对掺稀土光纤棒一端镀对应激光波长的高反射膜5,用泵浦源2对掺稀土光纤棒进行端面泵浦,在掺稀土光纤棒的另一端光滑处理,螺旋耦合有源掺杂光纤棒单模输出激光器的激光从掺稀土光纤棒光滑处理的一端输出。 Of rare earth doped fiber laser wavelength corresponding to the rod end of plated high reflection film 5, a pump source 2 with end-pumped rare earth doped fiber on the rod, the other end of the smoothing process in the rare earth doped fiber rods, helical active doped fiber coupling rod a single mode laser output of the laser from one end of the rare-earth-doped optical fiber rod smoothed output. 实施例四本实施例参见图4,采用的掺稀土光纤棒与单模掺稀土光纤掺杂离子均为铒镱离子共掺,详细描述如下-单模掺稀土光纤6的芯径为8pm,掺稀土光纤棒芯4的芯径为20mm。 Embodiment 4 This embodiment Referring to FIG. 4 embodiment, the use of rare earth-doped single mode optical fiber rod with the rare earth doped fiber doped with erbium ions and ytterbium ions are co-doped, the following detailed description - a single mode rare earth doped core diameter of the optical fiber 6 8pm, mixed rare earth fiber rod core diameter of the core 4 20mm. 掺稀土光纤棒长度为50cm,单模掺稀土光纤6长度为40cm。 Rare earth doped fiber rod length of 50cm, a length of single mode rare earth doped fiber 6 of 40cm. 光纤光栅71、单模掺稀土光纤6与光纤光栅72相连接,用泵浦源1对单模掺稀土光纤6及光纤光栅71与光纤光栅72构成的激光器进行泵浦。 Fiber grating 71, the single mode rare earth doped fiber 6 is connected to the fiber grating 72, rare earth doped fiber and fiber grating 6 with one pair of single-mode pump source 71 and the laser-pumped fiber grating 72. 在掺稀土光纤棒3的包层上,刻凹形螺旋槽,螺距约为25cm ,凹形螺旋槽贯穿整个掺稀土光纤棒,有1个螺纹,凹形螺旋槽的底端面与掺稀土光纤棒中心的距离小于掺稀土光纤棒的1/2芯径。 On rare earth doped fiber rod cladding layer 3, the concave engraved spiral groove, pitch of about 25cm, the helical concave grooves throughout the rare earth-doped fiber rod has a thread, a concave bottom surface of the spiral groove rod rare earth doped fiber from the center of the rod is less than 1/2 of rare earth doped fiber core diameter. 将单模掺稀土光纤6置入凹形螺旋槽内,其中置入凹形螺旋槽内的单模掺稀土光纤6的部分或全部包层用氢氟酸腐蚀掉,放置方向单模掺稀土光纤腐蚀掉包层的部分朝向掺稀土光纤棒芯4;然后采用光学胶对凹形螺旋槽进行封装。 Single mode rare earth doped fiber 6 into the female spiral groove, wherein the spiral groove into the concave part or all of the single-mode doped rare-earth fiber cladding 6 is etched away with hydrofluoric acid, placing a single mode rare earth doped fiber direction etching portions of substitution rare earth doped fiber layer towards the core rod 4; then, using an optical adhesive to encapsulate the female spiral groove. 用泵浦源2对掺稀土光纤棒进行端面泵浦和用泵浦源21对掺稀土光纤棒进行侧面泵浦,在惨稀土光纤棒的两端光滑处理,螺旋耦合有源掺杂光纤棒单模输出激光器的激光从掺稀土光纤棒光滑处理另一端输出。 A pump source for two pairs of bars end-pumped rare earth doped fiber and a pump source for pumping side 21 pairs of rare earth doped fiber rod, both ends of the smoothing process in the rare earth miserable fiber rod, the helical rod coupling active doped fiber single mode laser output of the laser rod from the rare earth doped fiber output end of the other smoothing process. 实施例五本实施例中,采用的掺稀土光纤棒与单模掺稀土光纤掺杂离子均为任意的稀土离子,详细描述如下-单模掺稀土光纤6的芯径为5~10pm,掺稀土光纤棒芯4的芯径为0.1~300mm。 Example 5 This embodiment of the embodiment, using the rare earth-doped single mode optical fiber rod rare earth doped fiber doped with ions of rare earth ions are arbitrary, the following detailed description - a single mode rare earth doped core diameter of the optical fiber 6 5 ~ 10pm, rare earth-doped fiber core rod of core diameter of 4 0.1 ~ 300mm. 掺稀土光纤棒长度为lcm〜10m,单模掺稀土光纤6长度为10cm〜10m。 Rod length of rare earth doped fiber lcm~10m, single mode rare earth doped fiber length of 6 10cm~10m. 单模掺稀土光纤6两端与光纤光栅71、光纤光栅72连接,用泵浦源1对单模掺稀土光纤6及光纤光栅71与光纤光栅72构成的激光器进行泵浦。 Single mode rare earth doped fiber 6 is connected to both ends of the fiber grating 71, fiber grating 72, a rare earth doped fiber and fiber grating 6 with one pair of single-mode pump source 71 and the laser-pumped fiber grating 72. 在掺稀土光纤棒3的包层上,刻形状任意的螺旋槽,螺距任意,螺旋槽或贯穿整个光纤棒或存在于掺稀土光纤棒的一部分长度;螺旋槽的底端面与掺稀土光纤棒中心的距离小于掺稀土光纤棒的1/2芯径+5,。 On the clad layer rare earth-doped fiber rod 3, the carved shape of any spiral groove, pitch of any spiral grooves or throughout the fiber rod or a portion of its length present in the rare earth doped fiber rod; bottom surface of the rare earth-doped fiber rod center of the spiral groove distance is less than 1/2 of the rare earth doped fiber core diameter rod + 5 ,. 将单模掺稀土光纤6、单模掺稀土光纤6和光纤光栅71、单模掺稀土光纤6和光纤光栅72、单模掺稀土光纤6和光纤光栅71和光纤光栅72,置入螺旋槽内,其中置入螺旋槽内的光纤光栅、单模掺稀土光纤6的部分或全部包层去掉,放置方向为光纤光栅、单模掺稀土光纤6去掉包层的部分朝向掺稀土光纤棒;然后采用光学胶或者填充加热法对螺旋槽进行封装。 Single mode rare earth doped fiber 6, a single mode rare earth doped fiber 71 and the fiber grating 6, a single mode rare earth doped fiber 72 and the fiber grating 6, a single mode rare earth doped fiber 71 and the fiber grating 6 and a fiber grating 72, into the helical groove wherein the spiral grooves into part of the fiber grating, a single mode rare earth doped fiber or all of the cladding 6 is removed, placed in a direction of grating, single mode rare earth doped fiber cladding removed portion 6 toward the rare earth-doped fiber rod; then using The optical glue or spiral groove filled heating encapsulation. 用泵浦源2或/和泵浦源21对掺稀土光纤棒进行端面泵浦或/和侧面泵浦,对掺稀土光纤棒一端镀谐振波长激光的高反射膜,另外一端光滑处理或两端光滑处理,螺旋耦合有源掺杂光纤棒单模输出激光器的激光从掺稀土光纤棒6光滑处理的任一端面输出。 A pump source for 2 or / and the pump source 21 to the rod end-pumped rare earth doped fiber and / or side-pumped, rare earth doped fiber on the high-reflection film coated rod end of the resonance wavelength of the laser, the other end or both ends of the smoothing process a smoothing process according to any output end surface, the spiral rod coupling active doped fiber single mode laser output of the laser rod from the rare earth doped fiber 6 slickened.

Claims (3)

1.一种螺旋耦合有源掺杂光纤棒单模输出激光器,其特征为:它包括第一泵浦源(1)与第二泵浦源(2)、单模掺稀土光纤(6)、掺稀土光纤棒;其中第一泵浦源(1)对第一光纤光栅(71)、第二光纤光栅(72)与单模掺稀土光纤(6)构成的激光器进行泵浦; 泵浦源(2)对掺稀土光纤棒进行泵浦,将第一光纤光栅(71)、第二光纤光栅(72)、单模掺稀土光纤(6)连接在一起,置入在掺稀土光纤棒包层(3)上刻的螺旋槽内,其中置入槽内的光纤光栅、单模掺稀土光纤(6)部分或全部包层去掉,并对槽进行封装。 1. A spiral-doped fiber coupled to the active single mode output of the laser rod, characterized in that: it comprises a first pump source (1) and a second pump source (2), a single mode rare earth doped fiber (6), rare earth-doped fiber rod; wherein a first pump source (1) of the first fiber grating (71), a second fiber grating (72) with a single mode rare earth doped fiber (6) composed of a laser pumped; pump source ( 2) of the rare earth doped fiber is pumped rod, the first fiber grating (71), a second fiber grating (72), a single mode rare earth doped fiber (6) are joined together, placed in the rare earth-doped fiber rod cladding ( 3) engraved on the spiral groove, into which groove an optical fiber grating, a single mode rare earth doped fiber (6) part or all of the cladding is removed, and the groove encapsulation.
2. 根据权利要求1所述的螺旋耦合有源掺杂光纤棒单模输出激光器,其特征为:在掺稀土光纤棒包层(3)上刻的螺旋槽,槽的底端面与掺稀土光纤棒芯(4)中心的距离小于掺稀土光纤棒芯的半径+5(im。 2. The spiral coupler according to claim 1 The active doped fiber single mode output of the laser rod, wherein: the rare earth-doped fiber rod cladding layer (3) on the engraved spiral groove, the bottom surface of the groove and the rare earth doped fiber from core rod (4) is smaller than the center rod rare earth doped fiber core radius +5 (im.
3. 根据权利要求1所述的螺旋耦合有源掺杂光纤棒单模输出激光器,其特征为:在掺稀土光纤棒包层(3)上刻的螺旋槽的形状为V字形、凹字形,槽或贯穿整个光纤棒或存在于掺稀土光纤棒的一部分长度上。 The spiral 1 is coupled to the active fiber doped single mode output of the laser rod, characterized in the claims: In the rare earth-doped fiber rod shape clad layer (3) spiral groove engraved on a V-shape, concave shape, grooves or throughout the entire length of the rod portion of the fiber present in the rare earth doped fiber or rod.
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