Theoretical and experimental investigations of metal sulfide dielectric coatings for hollow waveguides

Moshe Ben-David; Merav Catalogna; James A. Harrington; Veena Krishnan; Israel Gannot

doi:10.1117/1.2896538

1 April 2008 Theoretical and experimental investigations of metal sulfide dielectric coatings for hollow waveguides

Moshe Ben-David, Merav Catalogna, James A. Harrington, Veena Krishnan, Israel Gannot

Author Affiliations +

Optical Engineering, Vol. 47, Issue 4, 045008 (April 2008). https://doi.org/10.1117/1.2896538

Abstract

Continuous efforts to develop low-loss flexible waveguides, to transmit mid-IR laser energy for minimally invasive surgical and diagnostic procedures, have been carried out by us and other groups. We have introduced sulfide dielectric films coated over an Ag reflecting layer as another potential solution. The metal sulfides used have high transparency in the IR spectrum, and their thickness can be tailored to minimize the attenuation over a selected wavelength range. The high refractive index contrast of the two metal sulfide materials enables us to produce multilayer hollow waveguides. These waveguide will have low attenuation in both straight and bent conditions, low sensitivity to coupling and to surface roughness, and a broad wavelength range. The lowest loss for a straight guide, measured at 1.55 μm for a 1,000-μm-bore Ag/CdS/PbS/CdS hollow glass waveguide (HGW), was 0.06 dB/m. This loss is three times less than that measured for a single-layer Ag/CdS-coated HGW at 1.55 μm. A theoretical simulation applying the same conditions showed the same pattern with a good potential for improvement.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Moshe Ben-David, Merav Catalogna, James A. Harrington, Veena Krishnan, and Israel Gannot "Theoretical and experimental investigations of metal sulfide dielectric coatings for hollow waveguides," Optical Engineering 47(4), 045008 (1 April 2008). https://doi.org/10.1117/1.2896538

Published: 1 April 2008

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