High Power Single Mode 1300-nm Superlattice based VCSEL: Impact of the Buried Tunnel Junction Diameter on Performance

Author(s):  
Sergey A. Blokhin ◽  
Andrey V. Babichev ◽  
Andrey G. Gladyshev ◽  
Leonid Ya. Karachinsky ◽  
Innokenty I. Novikov ◽  
...  
2021 ◽  
Vol 9 ◽  
Author(s):  
Caijian Xie ◽  
Tigang Ning ◽  
Jingjing Zheng ◽  
Li Pei ◽  
Jianshuai Wang ◽  
...  

Abstract A kind of tapered segmented cladding fiber (T-SCF) with large mode area (LMA) is proposed, and the mode and amplification characteristics of T-SCFs with concave, linear, and convex tapered structures are investigated based on finite-element method (FEM) and few-mode steady-state rate equation. Simulation results indicate that the concave tapered structure can introduce high loss for high-order modes (HOMs) that is advantageous to achieve single-mode operation, whereas the convex tapered structure provides large effective mode area that can help to mitigate nonlinear effects. Meanwhile, the small-to-large amplification scheme shows further advantages on stripping off HOMs, and the large-to-small amplification scheme decreases the heat load density induced by the high-power pump. Moreover, single-mode propagation performance, effective mode area, and heat load density of the T-SCF are superior to those of tapered step index fiber (T-SIF). These theoretical model and numerical results can provide instructive suggestions for designing high-power fiber lasers and amplifiers.


2021 ◽  
Vol 9 ◽  
Author(s):  
Xin Zhang ◽  
Shoufei Gao ◽  
Yingying Wang ◽  
Wei Ding ◽  
Pu Wang

Abstract High-power fiber lasers have experienced a dramatic development over the last decade. Further increasing the output power needs an upscaling of the fiber mode area, while maintaining a single-mode output. Here, we propose an all-solid anti-resonant fiber (ARF) structure, which ensures single-mode operation in broadband by resonantly coupling higher-order modes into the cladding. A series of fibers with core sizes ranging from 40 to 100 μm are proposed exhibiting maximum mode area exceeding 5000 μm2. Numerical simulations show this resonant coupling scheme provides a higher-order mode (mainly TE01, TM01, and HE21) suppression ratio of more than 20 dB, while keeping the fundamental mode loss lower than 1 dB/m. The proposed structure also exhibits high tolerance for core index depression.


1992 ◽  
Author(s):  
Hal A. Zarem ◽  
Joel S. Paslaski ◽  
Michael Mittelstein ◽  
Jeffrey E. Ungar ◽  
Israel Ury

2008 ◽  
Vol 40 (2-4) ◽  
pp. 155-165 ◽  
Author(s):  
Jean-Philippe Tourrenc ◽  
Sophie Bouchoule ◽  
Aghiad Khadour ◽  
Jean-Christophe Harmand ◽  
Audrey Miard ◽  
...  

1992 ◽  
Vol 15 (3) ◽  
pp. 343-349
Author(s):  
Yi Ting ◽  
Hann‐Hua Luo
Keyword(s):  

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