共查询到20条相似文献,搜索用时 15 毫秒
1.
分别使用976 nm半导体激光器和1040 nm光纤激光器作为泵浦源,实现了1137 nm长波光纤激光器的出光,输出功率均超过百mW。激光器采用相同的线性腔结构,高反光栅和低反光栅的反射率分别为99.6%和39.7%,增益介质是一段8 m长的掺镱光纤,纤芯直径5 m。当976 nm半导体泵浦功率为912 mW时,1137 nm激光输出功率为182 mW,对应的斜率效率为28.5%;当1040 nm激光功率为1.59 W时,输出的1137 nm激光功率为278 mW,斜率效率约为25%。在此基础上对两种泵浦方式进行了对比分析。 相似文献
2.
The diode laser (LD) clad-pumped 1947.6 nm continuous wave (CW) Tm3+-doped fiber amplifier is reported using the master oscillation power amplifier (MOPA) method. The injected seed laser is
provided by an all-fiber LD-clad-pumped Tm3+-doped single-mode fiber laser, which has a nearly 2.4 W maximal output power and 0.1 nm ultra-narrow linewidth based on the
intracore reflection FBG. Using the 25/400 μm double-clad LMA Tm3+-doped fiber as the gain fiber, the output maximal output power is 30.6 W from the fiber amplifier, with a slope efficiency
of 39.1% respected to the LD total output power. A high power multi-mode fiber combiner is used to couple high power LD light
into the gain fiber. The output wavelength is also located at 1947.6 nm, with the slightly expanded laser linewidth of 0.2
nm. 相似文献
3.
以光纤光栅为谐振腔搭建了波长为1020 nm的光纤激光器,并通过两级级联放大获得了590 mW的最大输出功率. 利用获得的波长为1020 nm的激光进行了波长为1064 nm种子光同带抽运放大,实验研究了不同增益光纤长度时放大器的输出功率和转换效率. 当增益光纤长度为8.5 m时,放大器最大输出功率为385 mW,斜率效率为81%. 进行了波长为976 nm的半导体激光器直接抽运波长为1064 nm种子光的实验. 在增益光纤长度最优时,其斜率效率为56.4%. 实验结果表明,同带抽运方式比传统抽运方式具有更高的转换效率. 研究结果可为波长为1020 nm的激光高功率放大和波长为1064 nm的光纤激光高功率同带抽运放大提供一定的参考.
关键词:
同带抽运
光纤放大器
斜率效率 相似文献
4.
对掺钕光纤激光器输出功率沿光纤的分布以及不同光纤长度下抽运功率和输出功率沿光纤的分布进行了数值模拟.以808nm半导体激光器为抽运源,掺钕双包层保偏光纤为增益介质,对保偏光纤激光器进行了探索性的实验研究.分别就光纤不同弯曲形状和弯曲半径对激光器输出功率指标和偏振特性的影响进行了研究,实验中发现在1060nm和1092nm处有两个峰值.在波长1060nm处得到了7.35W的连续偏振激光输出,斜率效率为58.3%.
关键词:
激光技术
光纤激光器
掺钕保偏光纤
偏振 相似文献
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6.
Hongwei Chen Yanlong Shen Mengmeng Tao Kunpeng Luan Ke Huang Li Yu Aiping Yi Guobin Feng 《Journal of Russian Laser Research》2016,37(3):297-301
We present an all-fiber 1150 nm Yb-doped fiber laser oscillator pumped by a 976 nm laser diode. To suppress amplified spontaneous emission and avoid parasitic laser oscillation, we propose a long-length gain fiber and a high-reflectivity output fiber Bragg grating in the fiber laser oscillator. The 1150 nm band single-mode fiber laser with output power of 20.5 W is demonstrated at room temperature. The optical-to-optical conversion efficiency ranges up to 51.6% at the maximum output. The central wavelength of the fiber laser oscillator is 1150.35 nm, and its 3 dB spectral width is 0.72 nm. No evidence of amplified spontaneous emission, residual pump light, or parasitic laser oscillation were observed in the experiments. The high-power 1150 nm fiber laser oscillator can be used as a pump source in the development of a 3 μm Ho-doped fiber laser. 相似文献
7.
Hoon Jeong Hyoyeong Park Seungtaek Kim Jongseok Kim Chulsoo Byun Cheolho Kim 《Optical Review》2012,19(2):86-88
Master oscillator power amplifier (MOPA) technology has been widely used in high-power or ultrashort-pulse fiber laser systems
because the shape of the laser pulse can be easily adjusted. Usually, the first amplification stage of a 1064 nm fiber laser
uses the core-pumped Yb-doped fiber amplifier (YDFA); however, the gain or output power is limited owing to the strong amplifier
spontaneous emission (ASE) in the 1030 nm band. This paper presents the improved output power in an YDFA by inserting an additional
unpumped Yb-doped fiber, which absorbs the lost backward ASE emitted from the pump end. We achieved an output power increase
of more than 10% in a low-power signal, and the increase in output power decreased as the signal power increased. Moreover,
the insertion of an additional unpumped Yb-doped fiber restricted the unwanted 1030 nm lasing in a low-power signal. 相似文献
8.
9.
A high-power singlemode Raman fiber laser (RFL) with maximum output power of 4.11 W and maximum power conversion efficiency of 47.40% at 1239 nm is realized using continuous wave 8.4 W Yb-doped double-clad fiber laser as a pump, 700 m phosphosilicate fiber, and a Raman cavity formed by a pair of fiber Bragg grating mirrors at 1239 nm. The output characteristics of the RFL at 1239 nm for different fiber lengths and output mirror reflectance are reported. Theoretical simulation is done to numerically optimize for fiber length and output coupler reflectivity to obtain maximum first Stokes power. 相似文献
10.
We presented the first demonstration of a special S-band Yb-doped fiber laser with a central wavelength of 1012 nm. By pumping
common alumosilicate fiber doped with 974 nm laser diode, efficient lasing at 1012 nm was achieved with a maximal output power
of 331 mW and 55% power conversion efficiency. We also built a fiber amplifier to validate the feasibility of the 1012 nm
laser as the tandem pump source by boosting the 1064 nm C-band laser power up. The slope efficiency of the tandem-pumped fiber
amplifier is 63%. 相似文献
11.
12.
We report on high-power operation of a fiber distributed-feedback (DFB) laser fabricated from Tm-doped photosensitive alumino-silicate fiber and in-band pumped by an Er/Yb fiber laser at 1565 nm. The fiber DFB laser yielded up to 875 mW of single-ended output at 1943 nm on two orthogonally polarized modes for 3.5 W of absorbed pump power. Further scaling of the DFB laser output power was achieved with the aid of a simple Tm-doped fiber amplifier stage spliced directly to the DFB fiber without the need of an optical isolator. The maximum output power from the DFB laser and fiber amplifier was >3 W for a combined absorbed pump power of 8.1 W. The influence of thermal loading, owing to quantum defect heating in the Tm-doped core, on the output power and longitudinal mode behavior is discussed, and the prospects for further improvement in performance are considered. 相似文献
13.
1 Introduction Today ,theEr3 dopedfiberlaserandtheamplifierarewidelyusedinthefieldofopticalcommunicationandotherfields.TheYb3 dopedfiberlaserandamplifierhavebeeninventedandusedinmanyimportantfieldstoo ,andtheyareattractingmoreandmoreattention[1~ 4 ] .Compar… 相似文献
14.
We demonstrate a high power all fiber single-frequency MOPA laser. The center wavelength of the single-frequency fiber laser
seed is 1064 nm with a linewidth narrower than 20 kHz. A two-stage power amplification configuration is employed. A single-frequency
fiber laser with an output power of 29.2 W is obtained, and the optical to optical efficiency is 78%. 相似文献
15.
Gilberto Anzueto-Sánchez Alejandro Martínez-Rios Ismael Torres-Gómez Romeo Selvas-Aguilar Andrey Nicolaevich Starodumov 《Optical Review》2006,13(6):424-426
We examine the characteristics of a P2O5-doped Raman fiber laser pumped by a double-clad ytterbium-doped fiber laser in an intra-cavity configuration. The double-clad
fiber laser consists of two high reflection fiber Bragg gratings at 1092 nm, with an active length of 17 m, where the output
grating is located at the end of the 400m P2O5-doped fiber. The Raman cavity is formed by a 1278-nm-high reflection fiber Bragg grating spliced to the double-clad fiber,
and a 50% output coupler. The maximum conversion efficiency at 1278 nm with respect to the input pump power at 915 nm was
26.9%. 相似文献
16.
A novel Yb3+-doped fiber ring cavity laser pumped by a 977 nm laser diode is presented with its output laser wavelength of 1060 nm. Based on a fiber Bragg grating (FBG), the laser exhibits 0.20 nm line-width, 7.5 mW laser output power, 40 dB signal-to-noise ratio (SNR) and 66% slope efficiency. 相似文献
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18.
The top-hat beam clad-pumped Tm3+-doped fiber laser was realized simply using an intracavity multi-mode abrupt taper. The ratio of the flat-top diameter to
the spot diameter reaches 53%, with a small intensity variation less than 6%, and the top-hat beam’s half-divergence angle
is only 5.3°. The fiber laser has a maximal output power of 5 W with slope efficiency of 39.7%, pumped by the 792 nm diode
laser (LD). The abrupt taper is directly made on the multi-mode double-clad Tm3+-doped fiber near the fiber laser output end with the 0.45 ratio of taper waist diameter to fiber clad diameter, and this
fiber end 4% Fresnel reflection is used to be the output coupler. The fiber laser’s high reflective coupler is an intracore
multi-mode FBG, which is directly written into the multi-mode Tm3+-doped fiber core using femtosecond laser and phase mask, at the other fiber end. The abrupt taper has no obviously influence
on the fiber laser output power, and the output laser spectrum. 相似文献
19.
The output characteristics of a linear cavity Yb-doped double-clad fiber (DCF) laser, including the effects of fiber length, fiber loss, and output mirror reflectivity on laser output power and threshold pump power have been studied theoretically and experimentally. In this paper, the linear cavity of double-clad fiber laser (DCFL) was composed of a pair of fiber Bragg gratings, while the facet of fiber was anti-reflection (AR) coated at 1070nm to erase the Fresnel reflection. Analysis showed that the laser output increases as the reflectivity of the fiber Bragg grating used as the output mirror decreases. At last, under the pump power of 14.4 W, single-mode laser output at 1070 nm was up to 10.8 W, with slope efficiency of 75 %. 相似文献
20.
高聪 刘念 李峰云 刘玙 代江云 沈昌乐 贺红磊 吕嘉坤 李芳 张立华 李雨薇 姜蕾 郭超 陶汝茂 柯伟伟 张昊宇 王建军 林宏奂 景峰 《强激光与粒子束》2022,34(5):051002-1-051002-3
长距离侧面泵浦激光光纤在泵浦光注入、热管理、非线性抑制等方面具有天然优势,是实现高功率激光输出的有效途径。研制了(1+1)型长距离侧面泵浦激光光纤,采用1018 nm同带泵浦反向注入方式实现了17.4 kW激光输出,斜率效率为82.1%,3 dB线宽为1.3 nm,拉曼抑制比为37.8 dB。研究结果展示了长距离侧面泵浦光纤作为数十千瓦光纤激光放大器增益介质的巨大应用潜力。 相似文献