Help
|
English

English

Engish-Pirate

한국어

Search

Advanced Search

Find results with:

Add another field

Search by date

Search by date:
from:
to
to:

Searching collections:

UMBC Electronic Theses and Dissertations

Add or remove collections

Home

UMBC Electronic Theses and Dissertations

Analysis of chalcogenide-glass photonic crystal fibers

Reference URL

Share

Add tags

Comment

To link to the entire object, paste this link in email, IM or document
To embed the entire object, paste this HTML in website To link to this page, paste this link in email, IM or document
To embed this page, paste this HTML in website

Analysis of chalcogenide-glass photonic crystal fibers

you wish to report:

Your comment:

Your Name:

...

Back to top

Powered by CONTENTdm®

Title	Analysis of chalcogenide-glass photonic crystal fibers
Author	Hu, Zhihang
Advisors	Menyuk, Curtis R.
Program	Electrical Engineering
UMBC Department	Computer Science and Electrical Engineering
Document Type	Dissertation
Sponsors	University of Maryland, Baltimore County (UMBC)
Keywords	Applied sciences, Pure sciences, Fiber design and fabrication, Fiber optics, Infrared, Supercontinuum generation, Photonic crystal fibers, Chalcogenides
Date Issued	2008
Abstract	In this dissertation, we describe a theoretical study of chalcogenide-glass photonic crystal fiber designs. Light can propagate in these glasses in the wavelength region λ = 2-11 μm, in contrast to standard silica fiber in which light does not propagate beyond ̧ μ≈ 2 μm. Consequently, they have important defense and biomedical applications. While silica-glass photonic crystal fibers have been extensively studied, that is not true for other glasses such as chalcogenide glasses. We have carried out this study in collaboration with researchers at the Naval Research Laboratory, who have provided the data that we use as input parameters to our simulations, as well as experimental results to compare to the simulations. In this dissertation, we first analyze leaky modes using traditional, one-dimensional slab waveguides. The reason for analyzing one-dimensional waveguides is that this analysis yields theoretical results that are of use in understanding the physics in the more complex geometry of two-dimensional waveguides. Next, we describe an investigation of the leakage loss from a finite number of air-hole rings in a photonic bandgap fiber as a function of the pitch and the refractive index. The leakage loss is due to incomplete mode confinement. It is shown that for a refractive index equal to 2.4, corresponding to chalcogenide glass at λ = 4 μm, the loss is minimal when the air-hole-diameter-to-pitch ratio equals 0.8. This result contrasts strongly with analogous results for silica fibers in which the leakage loss is minimized by making the air-hole-diameter-to-pitch ratio approach as close to 1.0 as possible. In addition to minimizing the leakage loss, the core geometry is optimized for air-core photonic bandgap fibers to decrease the effect of coupling losses to surface modes. Finally, the nonlinearity is characterized and used in simulations to study supercontinuum generation in chalcogenide fibers. The nonlinearities that must be included are the Kerr and Raman effects. After verifying that the simulation code reproduces the spectrum that was observed in experimental studies of infrared supercontinuum generation from 2.1 to 3.2 μm, we then used the code to predict that a bandwidth of more than 4 μm can be generated using an As 2 Se 3 -based chalcogenide photonic crystal fiber with an air-hole-diameter-to-pitch ratio of 0.4 and a pitch of 3 μm.
Identifier	10005
Format	application: pdf
Language	en
Collection	UMBC Thesis and Dissertations
Rights Statement	This item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please see http://library.umbc.edu/speccoll/rightsreproductions.php or contact Special Collections at speccoll(at)umbc.edu.
Source	Hu_umbc_0434D_10005.pdf
Access Rights	Access limited to the UMBC community. Item may possibly be obtained via Interlibrary Loan through a local library, pending author/copyright holder's permission.

Title	Analysis of chalcogenide-glass photonic crystal fibers
Author	Hu, Zhihang

Analysis of chalcogenide-glass photonic crystal fibers

Object Description

Description

Tags

Comments

Analysis of chalcogenide-glass photonic crystal fibers

Analysis of chalcogenide-glass photonic crystal fibers