Highly efficient Yb-free Er-La-Al doped ultra-low NA large mode area single-trench fiber laser.
Deepak Jain,Shaif-ul Alam,Yongmin Jung,Pranabesh Barua,Martin Nunez Velazquez,Jayanta K. Sahu +5 more
TLDR
In this paper, a 60µm core diameter Yb free Er-La-Al doped single-trench fiber having a 0.038 ultra-low-NA, fabricated using conventional MCVD process in conjunction with solution doping technique.Abstract:
We demonstrate a 60µm core diameter Yb free Er-La-Al doped single-trench fiber having a 0.038 ultra-low-NA, fabricated using conventional MCVD process in conjunction with solution doping technique. Numerical simulations predict an effective single mode operation with effective area varying from 1,820µm2 to 1,960µm2 (taking bend-induced modal distortion into account) for different thicknesses of trenches and resonant rings at a constant bend radius of 25cm. Moreover, all solid structure favors easy cleaving and splicing. Experimental measurements demonstrate a robust effective single mode operation. Furthermore, with a 4%-4% laser cavity, this fiber shows a record efficiency of 46% with respect to the absorbed pump power.read more
Citations
More filters
Journal ArticleDOI
Large Mode Area Single Trench Fiber for 2 μm Operation
Deepak Jain,Jayanta K. Sahu +1 more
TL;DR: In this paper, the performance of single trench fibers has been investigated using finite element method at the wavelength of 2.5 GHz at ∼40 and 25 cm bend radius, respectively, by exploiting high delocalization of the higher order modes.
Journal ArticleDOI
Modified Single Trench Fiber With Effective Single-Mode Operation for High-Power Application
Liangjin Huang,Tianfu Yao,Binhua Yang,Jinyong Leng,Pu Zhou,Zhiyong Pan,Shaoyi Gu,Xiang ai Cheng +7 more
TL;DR: In this paper, the modified single trench fiber (MSTF) is proposed, which is successively surrounded by the trench and ring whose refractive index is lower than that of the inner cladding and identical with the core, respectively.
Journal ArticleDOI
High average power, 10 GHz pulses from a very-large-mode-area, Er-doped fiber amplifier
TL;DR: In this article, a very large-mode-area (VLMA) Er-doped fiber with an effective area of ∼1100μm2 was used to achieve high average power, high peak power amplification of 10 GHz, picosecond and femtosecond pulses.
Journal ArticleDOI
Bend resistant large mode area fiber with step-index core and single trench
TL;DR: In this article, a bend resistant large mode area fiber with step-index core and single trench in the cladding is proposed, and the largest effective mode area reaches up to 2460 µm2 at the wavelength of 2 µm when the bend radius is only 10 cm.
Journal ArticleDOI
Breaking the Stringent Trade-Off Between Mode Area and NA for Efficient High-Power Fiber Lasers Around 2 μm
TL;DR: In this paper, the LP02 mode is exploited in ultra-high NA confined-doped M-type fibers to ensure effective singlemode operation, thereby breaking the trade-off between mode-area scaling and ultra high NA.
References
More filters
Journal ArticleDOI
High-power fibre lasers
Cesar Jauregui,Jens Limpert,Jens Limpert,Jens Limpert,Andreas Tünnermann,Andreas Tünnermann,Andreas Tünnermann +6 more
TL;DR: An overview of the state of the art in the field can be found in this paper, where the authors discuss present challenges and the future outlook of high-power fiber laser applications.
Journal ArticleDOI
Erbium:Ytterbium Codoped Large-Core Fiber Laser With 297-W Continuous-Wave Output Power
Yoonchan Jeong,Seongwoo Yoo,C.A. Coderaard,Johan Nilsson,J.K. Sahu,David N. Payne,R. Horley,Paul Turner,L.M.B. Hickey,A. Harker,M. Lovelady,A. Piper +11 more
TL;DR: In this paper, a high power and high efficiency erbium:ytterbium (Er:Yb) codoped fiber laser was demonstrated, which produces 297 W of continuous-wave output at 1567 nm.
Journal ArticleDOI
Mode area scaling with multi-trench rod-type fibers.
TL;DR: A novel all-solid rod-type fiber structure that presents a cylindrical symmetry and low refractive-index contrasts is proposed that achieves a fundamental mode effective area as large as 5000 µm² at a wavelength of 1.06 μm in fibers ensuring a high leakage loss ratio.
Journal ArticleDOI
Demonstration of ultra-low NA rare-earth doped step index fiber for applications in high power fiber lasers.
TL;DR: The optimized modified chemical vapor deposition process in conjunction with solution doping process allows fabrication of an Yb-doped step index fiber having an ultra-low numerical aperture of ~0.038.
Proceedings ArticleDOI
High power fiber lasers
Yoonchan Jeong,Johan Nilsson,Jayanta K. Sahu,P. Dupriez,Christophe A. Codemard,Daniel B. S. Soh,C. Farrell,J. W. Kim,David J. Richardson,David N. Payne +9 more
TL;DR: In this article, the fundamental aspects of high-power fiber lasers and their recent dramatic advances and prospects including their up-to-date experimental results with particular attention to kilowatt-class, refined power amplifier regimes are discussed.