scholarly journals Mid-infrared Raman lasers and Kerr-frequency combs from an all-silica narrow-linewidth microresonator/fiber laser system

2020 ◽  
Vol 28 (25) ◽  
pp. 38304
Author(s):  
Shuisen Jiang ◽  
Changlei Guo ◽  
Hongyan Fu ◽  
Kaijun Che ◽  
Huiying Xu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Laser System ◽  
Narrow Linewidth ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Raman Lasers

Chalcogenide Glass Microfibers for Mid-Infrared Optics

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 497
Author(s):  
Dawei Cai ◽  
Yu Xie ◽  
Xin Guo ◽  
Pan Wang ◽  
Limin Tong
Keyword(s):  
Chalcogenide Glass ◽  
Near Infrared ◽  
Near Field ◽  
Broad Band ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Field Coupling ◽  
Raman Lasers ◽  
Challenges And Opportunities ◽  
Future Challenges

With diameters close to the wavelength of the guided light, optical microfibers (MFs) can guide light with tight optical confinement, strong evanescent fields and manageable waveguide dispersion and have been widely investigated in the past decades for a variety of applications. Compared to silica MFs, which are ideal for working in visible and near-infrared regions, chalcogenide glass (ChG) MFs are promising for mid-infrared (mid-IR) optics, owing to their easy fabrication, broad-band transparency and high nonlinearity, and have been attracting increasing attention in applications ranging from near-field coupling and molecular sensing to nonlinear optics. Here, we review this emerging field, mainly based on its progress in the last decade. Starting from the high-temperature taper drawing technique for MF fabrication, we introduce basic mid-IR waveguiding properties of typical ChG MFs made of As2S3 and As2Se3. Then, we focus on ChG-MF-based passive optical devices, including optical couplers, resonators and gratings and active and nonlinear applications of ChG MFs for mid-IR Raman lasers, frequency combs and supercontinuum (SC) generation. MF-based spectroscopy and chemical/biological sensors are also introduced. Finally, we conclude the review with a brief summary and an outlook on future challenges and opportunities of ChG MFs.

Green picosecond narrow-linewidth tapered fiber laser system

2020 ◽  
Author(s):  
Vasilii Ustimchik ◽  
Andrei Fedotov ◽  
Joona Rissanen ◽  
Teppo Noronen ◽  
Regina Gumenyuk ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Laser System ◽  
Narrow Linewidth ◽  
Tapered Fiber

scholarly journals Narrow-Linewidth 2 μm All-Fiber Laser Amplifier with a Highly Stable and Precisely Tunable Wavelength for Gas Molecule Absorption in Photonic Crystal Hollow-Core Fibers

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5323
Author(s):  
Wenxi Pei ◽  
Hao Li ◽  
Yulong Cui ◽  
Zhiyue Zhou ◽  
Meng Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fiber Laser ◽  
High Power ◽  
Gas Absorption ◽  
Laser Linewidth ◽  
Narrow Linewidth ◽  
Hollow Core ◽  
Mid Infrared ◽  
Gas Lasers ◽  
Tunable Wavelength

In recent years, mid-infrared fiber lasers based on gas-filled photonic crystal hollow-core fibers (HCFs) have attracted enormous attention. They provide a potential method for the generation of high-power mid-infrared emissions, particularly beyond 4 μm. However, there are high requirements of the pump for wavelength stability, tunability, laser linewidth, etc., due to the narrow absorption linewidth of gases. Here, we present the use of a narrow-linewidth, high-power fiber laser with a highly stable and precisely tunable wavelength at 2 μm for gas absorption. It was a master oscillator power-amplifier (MOPA) structure, consisting of a narrow-linewidth fiber seed and two stages of Thulium-doped fiber amplifiers (TDFAs). The seed wavelength was very stable and was precisely tuned from 1971.4 to 1971.8 nm by temperature. Both stages of the amplifiers were forward-pumping, and a maximum output power of 24.8 W was obtained, with a slope efficiency of about 50.5%. The measured laser linewidth was much narrower than the gas absorption linewidth and the wavelength stability was validated by HBr gas absorption in HCFs. If the seed is replaced, this MOPA laser can provide a versatile pump source for mid-infrared fiber gas lasers.

A Mid-Infrared Mode-locked Fiber Laser for Frequency Combs

2015 ◽  
Author(s):  
Tomonori Hu ◽  
Stuart D. Jackson ◽  
Darren D. Hudson
Keyword(s):  
Fiber Laser ◽  
Mid Infrared ◽  
Frequency Combs
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