Sub-cycle QAM modulation for VCSEL-based optical fiber links

Tien-Thang Pham; Roberto Rodes Lopez; Jesper Bevensee Jensen; Connie J. Chang-Hasnain; Idelfonso  Tafur Monroy

doi:10.1364/OE.21.001830

Sub-cycle QAM modulation for VCSEL-based optical fiber links

Tien-Thang Pham, Roberto Rodes Lopez, Jesper Bevensee Jensen, Connie J. Chang-Hasnain, Idelfonso Tafur Monroy

University of California at San Diego

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

QAM modulation utilizing subcarrier frequency lower than the symbol rate is both theoretically and experimentally investigated. High spectral efficiency and concentration of power in low frequencies make sub-cycle QAM signals attractive for optical fiber links with direct modulated light sources. Real-time generated 10-Gbps 4-level QAM signal in a 7.5-GHz bandwidth utilizing subcarrier frequency at a half symbol rate was successfully transmitted over 20-km SMF using an un-cooled 1.5-μm VCSEL. Only 2.5-dB fiber transmission power penalty was observed with no equalization applied.

Original language	English
Journal	Optics Express
Volume	21
Issue number	2
Pages (from-to)	1830-1839
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.21.001830
Publication status	Published - 2013

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-2-1830. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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title = "Sub-cycle QAM modulation for VCSEL-based optical fiber links",

abstract = "QAM modulation utilizing subcarrier frequency lower than the symbol rate is both theoretically and experimentally investigated. High spectral efficiency and concentration of power in low frequencies make sub-cycle QAM signals attractive for optical fiber links with direct modulated light sources. Real-time generated 10-Gbps 4-level QAM signal in a 7.5-GHz bandwidth utilizing subcarrier frequency at a half symbol rate was successfully transmitted over 20-km SMF using an un-cooled 1.5-μm VCSEL. Only 2.5-dB fiber transmission power penalty was observed with no equalization applied.",

author = "Tien-Thang Pham and {Rodes Lopez}, Roberto and Jensen, {Jesper Bevensee} and Chang-Hasnain, {Connie J.} and {Tafur Monroy}, Idelfonso",

note = "This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-2-1830. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

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AU - Rodes Lopez, Roberto

AU - Jensen, Jesper Bevensee

AU - Chang-Hasnain, Connie J.

AU - Tafur Monroy, Idelfonso

N1 - This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-21-2-1830. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2013

Y1 - 2013

N2 - QAM modulation utilizing subcarrier frequency lower than the symbol rate is both theoretically and experimentally investigated. High spectral efficiency and concentration of power in low frequencies make sub-cycle QAM signals attractive for optical fiber links with direct modulated light sources. Real-time generated 10-Gbps 4-level QAM signal in a 7.5-GHz bandwidth utilizing subcarrier frequency at a half symbol rate was successfully transmitted over 20-km SMF using an un-cooled 1.5-μm VCSEL. Only 2.5-dB fiber transmission power penalty was observed with no equalization applied.

AB - QAM modulation utilizing subcarrier frequency lower than the symbol rate is both theoretically and experimentally investigated. High spectral efficiency and concentration of power in low frequencies make sub-cycle QAM signals attractive for optical fiber links with direct modulated light sources. Real-time generated 10-Gbps 4-level QAM signal in a 7.5-GHz bandwidth utilizing subcarrier frequency at a half symbol rate was successfully transmitted over 20-km SMF using an un-cooled 1.5-μm VCSEL. Only 2.5-dB fiber transmission power penalty was observed with no equalization applied.

U2 - 10.1364/OE.21.001830

DO - 10.1364/OE.21.001830

M3 - Journal article

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JO - Optics Express

JF - Optics Express

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Sub-cycle QAM modulation for VCSEL-based optical fiber links

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