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Improved Pulsed Laser Operation with Engineered Nanomaterials.

Ryan E Latterman¹, Steven Birrell², Philip A Sullivan¹

¹Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States.

ACS Applied Materials & Interfaces

|July 9, 2016

Summary

Gold nanorod-doped epoxy coatings enhance diode-pumped solid-state laser efficiency by nearly twofold. This novel approach suppresses amplified spontaneous emission (ASE) in neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers.

Keywords:

Nd:YAG RAFT polymerization amplified stimulated emission gold nanorods stabilization

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Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

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Published on: February 27, 2013

Area of Science:

Materials Science
Optics and Photonics
Nanotechnology

Background:

Solid-state lasers, particularly diode-pumped neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers, are crucial in various scientific and industrial applications.
Amplified spontaneous emission (ASE) is a parasitic process that limits the power efficiency and output quality of Q-switched lasers.
Current methods for mitigating ASE, such as samarium oxide ceramics or organic dyes, face challenges in fabrication and photostability.

Purpose of the Study:

To improve the power efficiency of Nd:YAG lasers by developing a novel method to attenuate amplified spontaneous emission (ASE).
To synthesize gold nanorods with specific optical properties and functionalize them for integration into epoxy coatings.
To evaluate the effectiveness of gold nanorod-doped epoxy coatings in enhancing laser performance.

Main Methods:

Gold nanorods were synthesized and tuned to absorb at the Nd:YAG lasing wavelength (1064 nm).
A two-step functionalization process using polyethylene glycol (PEG) and a multidentate thiol-containing block copolymer was employed to enhance nanorod solubility in organic solvents.
The functionalized gold nanorods were incorporated into an epoxy matrix to create a coating for the Nd:YAG lasing medium.

Main Results:

The gold nanorod coating effectively absorbed excess lateral 1064 nm emission, thereby attenuating ASE.
Laser power output was nearly doubled with the application of the gold nanorod-doped epoxy coating.
The developed coating offers advantages over existing methods, avoiding fabrication difficulties and photostability issues.

Conclusions:

Gold nanorod-doped epoxy coatings represent a promising and effective strategy for suppressing ASE in solid-state lasers.
This approach offers a viable alternative to conventional ASE mitigation techniques, enhancing laser power efficiency and stability.
The developed materials and methods pave the way for more efficient and robust laser systems.