High-power operations of single-mode surface grating long oxide aperture VCSELs

2021 ◽  
Vol 119 (19) ◽  
pp. 191103
Author(s):  
Ahmed M. A. Hassan ◽  
Xiaodong Gu ◽  
Masanori Nakahama ◽  
Satoshi Shinada ◽  
Moustafa Ahmed ◽  
...  
Keyword(s):  
High Power ◽  
Single Mode ◽  
Surface Grating ◽  
Power Operations ◽  
Oxide Aperture

scholarly journals Surface Grating VCSEL-Integrated Amplifier/Beam Scanner with High Power and Single Mode Operation

2021 ◽  
Author(s):  
Shanting Hu ◽  
Xiaodong Gu ◽  
Ahmed Hassan ◽  
Masanori Nakahama ◽  
Fumio Koyama
Keyword(s):  
High Power ◽  
Single Mode ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Surface Grating

scholarly journals Surface grating VCSEL-integrated amplifier/beam scanner with high power and single mode operation

2021 ◽  
Author(s):  
SHANTING HU ◽  
Ahmed Hassan ◽  
Xiaodong Gu ◽  
Masanori Nakahama ◽  
Satoshi Shinada ◽  
...  
Keyword(s):  
High Power ◽  
Single Mode ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Surface Grating

scholarly journals High-power single-mode 894 nm VCSELs operating at high temperature (> 2 mW @ 365 K)

2022 ◽  
Vol 128 (1) ◽  
Author(s):  
Xue Ii ◽  
Yinli Zhou ◽  
Xing Zhang ◽  
Jianwei Zhang ◽  
Yugang Zeng ◽  
...  
Keyword(s):  
High Temperature ◽  
High Power ◽  
Surface Relief ◽  
Single Mode ◽  
Transverse Mode ◽  
Collaborative Optimization ◽  
Cavity Surface ◽  
Aperture Diameter ◽  
Mode Suppression ◽  
Oxide Aperture

AbstractIn this study, we realize the high-power output of a single-mode 894 nm vertical-cavity surface-emitting laser (VCSEL) at high temperature. The effects of the dimensional parameters of oxide aperture and surface relief on the transverse mode and threshold gain of VCSEL were analyzed. Through collaborative optimization of the oxide aperture and relief, the VCSEL with 8 µm oxide aperture diameter and 5 µm surface relief inner diameter can operate at high temperature of 365 K with single-mode output power of 2.02 mW and side-mode suppression of 29.2 dB.

scholarly journals Amplification characteristics in active tapered segmented cladding fiber with large mode area

2021 ◽  
Vol 9 ◽  
Author(s):  
Caijian Xie ◽  
Tigang Ning ◽  
Jingjing Zheng ◽  
Li Pei ◽  
Jianshuai Wang ◽  
...  
Keyword(s):  
High Power ◽  
Heat Load ◽  
Nonlinear Effects ◽  
Single Mode ◽  
Large Mode Area ◽  
High Loss ◽  
Effective Mode Area ◽  
Steady State Rate ◽  
State Rate ◽  
Mode Area

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.

scholarly journals Design of large mode area all-solid anti-resonant fiber for high-power lasers

2021 ◽  
Vol 9 ◽  
Author(s):  
Xin Zhang ◽  
Shoufei Gao ◽  
Yingying Wang ◽  
Wei Ding ◽  
Pu Wang
Keyword(s):  
High Power ◽  
Single Mode ◽  
Higher Order ◽  
Coupling Scheme ◽  
Resonant Coupling ◽  
Higher Order Modes ◽  
Mode Loss ◽  
Fiber Mode ◽  
Power Needs ◽  
Mode Area

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.

High-power single mode strained-layer lasers emitting at 980 nm

1992 ◽  
Author(s):  
Hal A. Zarem ◽  
Joel S. Paslaski ◽  
Michael Mittelstein ◽  
Jeffrey E. Ungar ◽  
Israel Ury
Keyword(s):  
High Power ◽  
Single Mode ◽  
Strained Layer

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

2022 ◽  
pp. 1-1
Author(s):  
Sergey A. Blokhin ◽  
Andrey V. Babichev ◽  
Andrey G. Gladyshev ◽  
Leonid Ya. Karachinsky ◽  
Innokenty I. Novikov ◽  
...  
Keyword(s):  
High Power ◽  
Tunnel Junction ◽  
Single Mode
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