Optical properties of semiconductor-core fibers for mid-IR transmission (Conference Presentation)

Mustafa Ordu; Jicheng Guo; Boyin Tai; Shyamsunder Erramilli; Siddharth Ramachandran; Soumendra N. Basu

doi:10.1117/12.2249691

28 April 2017 Optical properties of semiconductor-core fibers for mid-IR transmission (Conference Presentation)

Mustafa Ordu, Jicheng Guo, Boyin Tai, Shyamsunder Erramilli, Siddharth Ramachandran, Soumendra N. Basu

Proceedings Volume 10109, Optical Interconnects XVII; 101090Q (2017) https://doi.org/10.1117/12.2249691
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Mid-infrared (IR) fibers have been extensively investigated due to their applicability in chemical sensing and remote laser delivery, among others. Materials such as chalcogenides and fluoride glasses transmit mid-IR wavelengths with low practical losses. However, their low glass transition temperatures make them chemically unstable, even at room temperatures, resulting in performance degradation over time. Semiconductors, such as germanium, have a wide transmission window in the mid-IR region, and offer significantly improved chemical stability. In this research, germanium-core, borosilicate-cladded fibers were drawn by a ‘rod in tube’ method using a mini draw tower assembled in-house at 1000°C, which is significantly lower than the drawing temperatures of 2000-2200°C for conventional silica fibers. Typical drawn fibers had a 40 μm core diameter and 177 μm cladding diameter. Transmission electron microscopy (TEM) studies showed that diffusion of oxygen and silicon from the cladding to the core during the drawing process was minimal, with diffusion distances of the order of 10s of nm. This is encouraging for mid-IR transmission, since the presence of oxygen in the fiber core is known to increase transmission losses in the mid-IR spectrum. This low diffusivity is presumably due to the relatively low drawing temperature. Transmission losses through the fibers were measured with a quantum cascade laser (QCL) and the losses were found to be in the 3-9 dB/cm range in the spectral range of 5.75-6.3 μm.

Conference Presentation

Citation Download Citation

Mustafa Ordu, Jicheng Guo, Boyin Tai, Shyamsunder Erramilli, Siddharth Ramachandran, and Soumendra N. Basu "Optical properties of semiconductor-core fibers for mid-IR transmission (Conference Presentation)", Proc. SPIE 10109, Optical Interconnects XVII, 101090Q (28 April 2017); https://doi.org/10.1117/12.2249691

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
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Mid-IR

Optical fibers

Semiconductors

Cladding

Diffusion

Glasses

Optical properties

Show All Keywords

Keywords/Phrases

Search In:

Publication Years