Antireflective coatings on optical fibers for high-power solid state lasers

Manfred Dieckmann; Uwe Willamowski; Detlev Ristau; Herbert Welling; Bernhard Steiger; J. Franke; Reinhard Wolf

doi:10.1117/12.147435

24 June 1993 Antireflective coatings on optical fibers for high-power solid state lasers

Manfred Dieckmann, Uwe Willamowski, Detlev Ristau, Herbert Welling, Bernhard Steiger, J. Franke, Reinhard Wolf

Proceedings Volume 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992; (1993) https://doi.org/10.1117/12.147435
Event: Optical Materials for High Power Lasers, 1992, Boulder, CO, United States

Abstract

This paper presents investigations to improve the quality of high power antireflective coatings for optical fibers used in material processing with Nd:YAG lasers. The coatings were produced by electron-beam deposition and ion-beam-sputtering on step-index, multimode fibers with a core diameter of 1000 micrometers . The reflection losses, the absorption, and the laser-induced damage thresholds of these coatings were determined. Hafnia, tantala, and silica were selected as deposition materials for the AR-coatings. For measuring the reflection losses of the coated fiber surfaces, a diode-pumped Nd:YAG laser was used. Absorption measurements were performed by photothermal displacement spectroscopy, a surface sensitive technique which makes scanning of the fiber surface possible. These data were compared to calorimetric values determined from quartz substrates which were deposited in the same coating run. The R-on-1 damage thresholds of the coated fibers were measured using a two- stage single-mode Nd:YAG laser with a pulse duration of 12 ns. A four-stage cw system with 1.2 kW output power and a pulsed Nd:YAG slab laser were used to evaluate the performance of the coated fibers.

Citation Download Citation

Manfred Dieckmann, Uwe Willamowski, Detlev Ristau, Herbert Welling, Bernhard Steiger, J. Franke, and Reinhard Wolf "Antireflective coatings on optical fibers for high-power solid state lasers", Proc. SPIE 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992, (24 June 1993); https://doi.org/10.1117/12.147435

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