Laser durability evaluations of silica glass at 1064 nm and 213 nm

R. Kashiwagi

doi:10.1117/12.2327127

16 November 2018 Laser durability evaluations of silica glass at 1064 nm and 213 nm

R. Kashiwagi

Proceedings Volume 10805, Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference; 1080529 (2018) https://doi.org/10.1117/12.2327127
Event: SPIE Laser Damage, 2018, Boulder, Colorado, United States

Abstract

Nd:YAG lasers are easy to operate, and are used in material processing applications. Because they are high-power lasers, optical materials with high laser durability are required for their optical systems. One of the commonly used materials for high-power lasers is silica glass. The silica glass has not only high laser durability but also high transmittance from the UV region to the IR region. In this study, we evaluated the laser durability by measuring laser-induced bulk damage threshold (LIDT) of silica glasses at 1064 nm and 213 nm, as the one of the key indexes for laser durability. We obtained following results. First, at 1-on-1 LIDT measurements, the LIDTs of samples were almost the same at each wavelength. On the other hand, the LIDT results were different depending on the sample at 213 nm as well as at 355 nm and 266 nm. The more hydroxyl concentration the silica glass had, the lower laser durability the silica glass had. However the difference of LIDT results at 1064 nm was also small at 10000-on-1 LIDT. Second, the silica glass which includes chlorine had lower durability even if its hydroxyl concentration was very low. Finally, hydrogen concentration dependency of the durability was varied by the hydroxyl content. If the content of hydroxyl was ≤10 ppm, LIDT became lower as hydrogen concentration increased. On the other hand, if it was equal to 30 ppm, LIDT became higher as hydrogen concentration increased. Based on these results, we can improve laser durability of silica glass at 213 nm by either reducing hydroxyl and chlorine or controlling hydrogen concentration. We can also select an appropriate silica glass in accordance to use.

Citation Download Citation

R. Kashiwagi "Laser durability evaluations of silica glass at 1064 nm and 213 nm", Proc. SPIE 10805, Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference, 1080529 (16 November 2018); https://doi.org/10.1117/12.2327127

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Silica

Glasses

Hydrogen

Absorption

Transmittance

Laser induced damage

Nd:YAG lasers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years