Modal noise in multimode fiber-optic links using vertical cavity surface emitting lasers

Persistent Link:
http://hdl.handle.net/10150/282717
Title:
Modal noise in multimode fiber-optic links using vertical cavity surface emitting lasers
Author:
Kemme, Shanalyn Adair, 1961-
Issue Date:
1998
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A method to predict modal noise in short distance (30 m), high temporal bandwidth (hundreds of MHz) multimode optical links is proposed. In order to accommodate low cost, mechanical alignment, the link medium is modified from single mode fiber (used routinely in telecommunication systems) to multimode fiber. Modal dispersion in multimode fiber calls for a reduction in link length to preserve a relatively high temporal bandwidth. The source is a vertical cavity surface emitting laser (VCSEL), which is well suited for the high packaging density, high temporal bandwidth, and low power dissipation requirements of short distance optical communication systems. Coherence properties of several different types of VCSELs are experimentally examined with constant and modulated injection current with a bandwidth typical of that used in data communications systems. A fluctuation in the spatial irradiance output pattern of the VCSEL is identified as the dynamic component responsible for significant modal noise effects. The effect of finite system coherence length has been applied to the simulation process. The reduction in output fiber face speckle contrast, due to a broader source power spectrum and/or due to fiber modal dispersion with increasing fiber length, mitigates the effect of modal noise in the transmission link.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Physics, Optics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Optical Sciences
Degree Grantor:
University of Arizona
Advisor:
Kostuk, Raymond K.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleModal noise in multimode fiber-optic links using vertical cavity surface emitting lasersen_US
dc.creatorKemme, Shanalyn Adair, 1961-en_US
dc.contributor.authorKemme, Shanalyn Adair, 1961-en_US
dc.date.issued1998en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA method to predict modal noise in short distance (30 m), high temporal bandwidth (hundreds of MHz) multimode optical links is proposed. In order to accommodate low cost, mechanical alignment, the link medium is modified from single mode fiber (used routinely in telecommunication systems) to multimode fiber. Modal dispersion in multimode fiber calls for a reduction in link length to preserve a relatively high temporal bandwidth. The source is a vertical cavity surface emitting laser (VCSEL), which is well suited for the high packaging density, high temporal bandwidth, and low power dissipation requirements of short distance optical communication systems. Coherence properties of several different types of VCSELs are experimentally examined with constant and modulated injection current with a bandwidth typical of that used in data communications systems. A fluctuation in the spatial irradiance output pattern of the VCSEL is identified as the dynamic component responsible for significant modal noise effects. The effect of finite system coherence length has been applied to the simulation process. The reduction in output fiber face speckle contrast, due to a broader source power spectrum and/or due to fiber modal dispersion with increasing fiber length, mitigates the effect of modal noise in the transmission link.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectPhysics, Optics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorKostuk, Raymond K.en_US
dc.identifier.proquest9901687en_US
dc.identifier.bibrecord.b38825119en_US
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