-
High-power fiber laser oscillators have been widely used in industrial processing, material processing, biomedical and other fields due to their compact structure, simple logic and strong power scalability. With the continuous improvement of performance requirements for lasers in industrial applications, bidirectional output fiber laser based on a single resonator structure have a broad application prospect. This paper first establishes a theoretical model for a 1050 nm bidirectional output fiber laser oscillator based on the steady-state rate equation, and simulates the relationship between the length of the gain fiber and output power, efficiency, and the intensity of stimulated Raman scattering (SRS). A high-power bidirectional output fiber laser with a central wavelength of 1050 nm is built using an ytterbium-doped fiber with a core/cladding diameter of 20/400 μm. The output characteristics of the 1050 nm bidirectional output fiber laser oscillator under different pump methods (unidirectional pump, bidirectional pump) are experimentally studied in detail. With a total pump power of 5262 W, A-end output power of 1419 W and B-end output power of 3051 W were achieved, with a total output power of 4470 W, and the optical-to-optical conversion efficiency reached 84.9%. The corresponding beam qualities (M2factor) of both ends were 1.27 and 1.31 when the output powers reached 1458 W and 2733 W, respectively. By further optimizing the length of the gain fiber, the amplified spontaneous emission (ASE) and SRS were effectively suppressed. With a total pump power of 5262 W, the Raman suppression ratios at A-end and B-end were increased by about ~6.6 dB and ~8.1 dB, respectively. It is expected that higher output power can be achieved by increasing the pump power and optimizing the laser structure in the future.
-
Keywords:
- bidirectional output /
- fiber laser oscillator /
- near-single-mode /
- stimulated Raman scattering
-
[1] Richardson D J, Nilsson J, Clarkson W A 2010J. Opt. Soc. Am. B 27 B63
[2] Zervas, Michalis N 2014Int. J. Mod. Phys. B 28 1442009
[3] Wang X L, Zhang H W, Yang B L, Xi X M, Wang P, Shi C, Wang Z F, Zhou P, Xu X J, Chen J B 2021Chin. J. Lasers 48 401004
[4] Zhu J J, Zhou P, Ma Y X, Xu X J, Liu Z J 2011Opt. Express 19 18645
[5] Jauregui C, Limpert J, Tünnermann A 2013Nat Photonics 7 861
[6] Zervas M N 2019Opt. Express 27 19019
[7] J S, Augst, Ranka, K J, T Y Fan, Sanchez A 2007J. Opt. Soc. Am. B 24 1707
[8] Xin G F, Pi H Y, Shen L, Ju R H, Cai H W, Fang Z J, Chen G T 2010Laser Optoelectron. Prog. 4717[辛国锋,皮浩洋,沈力,瞿荣辉,蔡海文,方祖捷,陈高庭2010激光与光电子学进展47 17]
[9] Wang X L, Zeng L F, Ye Y, Liu J Q, Wu H S, Wang P, Yang B L, Xi X M, Zhang H W, Shi C, Xi F J, Wang Z F, Zhou P, Xu X J, Chen J B 2024Chin. J. Laser 51223[王小林,曾令筏,叶云,刘佳琪,吴函烁,王鹏,杨保来,奚小明,张汉伟,史尘,习锋杰,王泽锋,周朴,许晓军,陈金宝2024中国激光51 223]
[10] Zeng L F, Ding X Y, Liu J Q, Wang X L, Ye Y, Wu H S, Wang P, Xi X M, Zhang H W, Shi C, Xi F J, Xu X J 2024Micromachines-Basel 15 153
[11] Schmidt O, Wirth C, Rhein S, Rekas M, Kliner A, Schreiber T, Tünnermann R E, Andreas 2011The European Conference on Lasers and Electro-Optics Munich, Germany,May 22-26, 2011 p1
[12] Roman Y, Nikolai P, Alexander Y, Valentin P G 2016Proc.SPIE San Francisco,March 9,2016 p972807
[13] Sun Y H, Ke W W, Feng Y J, Wang Y S, Peng W J, Ma Y, Li T L, Wang X J, Tang C, Zhang K 2016Chin. J. Laser 43 601003
[14] Chu Q H, Shu Q, Liu Y 2020Opt. Lett. 45 6502
[15] Xu Y, Sheng Q, Wang P 2021Appl. Optics 60 3740
[16] Zheng Y H, Han Z G, Li Y L 2022Opt. Express 30 12670
[17] Liu Z J, Ma P F, Tao R M, Wang X L, Zhou P 2015Ieee J. Quantum Elect. 51 1
[18] Silva A, Boller K, Lindsay I D 2011Opt. Express 19 10511
[19] Liu C H, Galvanauskas A, Ehlers B, Doerfel F, Heinemann S, Carter A, Tankala K, Farroni J 2004Advanced Solid-State Photonics Santa Fe, New Mexico,February 1–4,2004 p17
[20] Wang X L, Ye Y, Xi X M, Shi C, Zhang H W, Han K, Wang Z F, Xu X J, Zhou P, Si L, Chen J B 2018CN Patent 201821644646.3(in Chinese) [王小林,叶云,奚小明,史尘,张汉伟,韩凯,王泽锋,许晓军,周朴,司磊,陈金宝2018中国专利201821644646.3]
[21] Zhong P L, Wang L, Yang B L 2022Opt. Lett. 47 2806
[22] Liu J Q, Zeng L F, Wang X L, Shi C, Wu H S, Wang P, Xi X M, Zhang H W, Ning Y, Xi F J 2024Opt. Laser Technol. 169 110031
[23] Li F C, Ding X Y, Wang P, Yang B L, Xi X M, Zhang H W, Wang X L, Chen J B 2023Photonics-Basel 10 912
Metrics
- Abstract views: 92
- PDF Downloads: 5
- Cited By: 0