CHIRPING IN 1. 55 mu m VAPOUR-PHASE-TRANSPORT DISTRIBUTED FEEDBACK (VPTDFB) SEMICONDUCTOR LASERS UNDER PICOSECOND GAIN SWITCHING AND 4 GHz MODULATION.

Chinlon Lin, Thomas L Koch

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

VPTDFB semiconductor lasers have been shown to exhibit low transient frequency chirp resulting in record distances for dispersive fiber transmission at 2 to 4 Gbit/s rates. The letter reports an experimental study of chirping in 1. 55 mu m VPTDFB lasers under the demanding situation of high-speed modulation with high pulse on/off ratios. The laser was modulated with 100 ps current pulses from a comb generator, or with high-frequency rf at 4 GHz. It is found that the chirped linewidth is between 2 to 8 A for modulation on/off ratios from 4:1 to more than 20:1. We infer that at high laser pulse on/off ratios there will be significant pulse distortion at 8 to 10 Gbit/s rates for fiber distance of APP GRTH 60 km even with these low chirp VPTDFB lasers.

Original languageEnglish (US)
Pages (from-to)958-960
Number of pages3
JournalElectronics Letters
Volume21
Issue number21
StatePublished - Jan 1 1985
Externally publishedYes

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Semiconductor lasers
Laser pulses
Distributed feedback lasers
Vapors
Feedback
Modulation
Fibers
Linewidth
Lasers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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title = "CHIRPING IN 1. 55 mu m VAPOUR-PHASE-TRANSPORT DISTRIBUTED FEEDBACK (VPTDFB) SEMICONDUCTOR LASERS UNDER PICOSECOND GAIN SWITCHING AND 4 GHz MODULATION.",
abstract = "VPTDFB semiconductor lasers have been shown to exhibit low transient frequency chirp resulting in record distances for dispersive fiber transmission at 2 to 4 Gbit/s rates. The letter reports an experimental study of chirping in 1. 55 mu m VPTDFB lasers under the demanding situation of high-speed modulation with high pulse on/off ratios. The laser was modulated with 100 ps current pulses from a comb generator, or with high-frequency rf at 4 GHz. It is found that the chirped linewidth is between 2 to 8 A for modulation on/off ratios from 4:1 to more than 20:1. We infer that at high laser pulse on/off ratios there will be significant pulse distortion at 8 to 10 Gbit/s rates for fiber distance of APP GRTH 60 km even with these low chirp VPTDFB lasers.",
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T1 - CHIRPING IN 1. 55 mu m VAPOUR-PHASE-TRANSPORT DISTRIBUTED FEEDBACK (VPTDFB) SEMICONDUCTOR LASERS UNDER PICOSECOND GAIN SWITCHING AND 4 GHz MODULATION.

AU - Lin, Chinlon

AU - Koch, Thomas L

PY - 1985/1/1

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N2 - VPTDFB semiconductor lasers have been shown to exhibit low transient frequency chirp resulting in record distances for dispersive fiber transmission at 2 to 4 Gbit/s rates. The letter reports an experimental study of chirping in 1. 55 mu m VPTDFB lasers under the demanding situation of high-speed modulation with high pulse on/off ratios. The laser was modulated with 100 ps current pulses from a comb generator, or with high-frequency rf at 4 GHz. It is found that the chirped linewidth is between 2 to 8 A for modulation on/off ratios from 4:1 to more than 20:1. We infer that at high laser pulse on/off ratios there will be significant pulse distortion at 8 to 10 Gbit/s rates for fiber distance of APP GRTH 60 km even with these low chirp VPTDFB lasers.

AB - VPTDFB semiconductor lasers have been shown to exhibit low transient frequency chirp resulting in record distances for dispersive fiber transmission at 2 to 4 Gbit/s rates. The letter reports an experimental study of chirping in 1. 55 mu m VPTDFB lasers under the demanding situation of high-speed modulation with high pulse on/off ratios. The laser was modulated with 100 ps current pulses from a comb generator, or with high-frequency rf at 4 GHz. It is found that the chirped linewidth is between 2 to 8 A for modulation on/off ratios from 4:1 to more than 20:1. We infer that at high laser pulse on/off ratios there will be significant pulse distortion at 8 to 10 Gbit/s rates for fiber distance of APP GRTH 60 km even with these low chirp VPTDFB lasers.

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