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Eye closure due to spatial hole-burning dynamics in λ/4-shifted DFB lasers

Eye closure due to spatial hole-burning dynamics in λ/4-shifted DFB lasers

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© The Institution of Electrical Engineers
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The dynamics of longitudinal spatial hole-burning (SHB) in a DFB laser are shown to cause significant pattern-dependent eye closure during transmitted 'ones' at 2-5Gbit/s. This closure is caused by recovery dynamics of the SHB during several 'zeros' and the subsequent time to reburn the hole. This eye closure can be reduced by biasing above threshold during 'zeros' to prevent recovery of the SHB, however higher biases cause significant turn-on peaks during ‘zeros’.

Inspec keywords: optical communication equipment; distributed feedback lasers; optical hole burning; semiconductor junction lasers

Other keywords: pattern-dependent eye closure; longitudinal spatial hole-burning; biasing above threshold; DFB lasers; quarter-wave shifted DFB lasers; 2.5 Gbit/s; recovery dynamics; turn-on peaks; spatial hole-burning dynamics

Subjects: Semiconductor lasers; Optical communication devices, equipment and systems; Optical transient phenomena, self-induced transparency, optical saturation and related effects; Lasing action in semiconductors; Nonlinear optics and devices; Optical communication

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