A High Power Single-Mode Tunable Laser for Nonlinear Optical Diagnostics in Combustion

2016 ◽  
pp. 71-72
Keyword(s):  
High Power ◽  
Nonlinear Optical ◽  
Tunable Laser ◽  
Optical Diagnostics ◽  
Single Mode

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.

Nonlinear optical diagnostics of local crystallization of lead zirconate titanate films using femtosecond laser radiation

2015 ◽  
Vol 41 (5) ◽  
pp. 418-421 ◽  
Author(s):  
A. S. Elshin ◽  
N. Yu. Firsova ◽  
M. A. Marchenkova ◽  
V. I. Emel’yanov ◽  
I. P. Pronin ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Lead Zirconate Titanate ◽  
Nonlinear Optical ◽  
Optical Diagnostics ◽  
Lead Zirconate ◽  
Femtosecond Laser Radiation ◽  
Zirconate Titanate

scholarly journals Compact single mode tunable laser using a digital micromirror device

2011 ◽  
Vol 19 (15) ◽  
pp. 14642 ◽  
Author(s):  
Frank Havermeyer ◽  
Lawrence Ho ◽  
Christophe Moser
Keyword(s):  
Tunable Laser ◽  
Single Mode ◽  
Digital Micromirror Device

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
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