Design and simulation of two-section DFB lasers with short active-section lengths | Zendy

Gongyuan Zhao | Zendy; Junqiang Sun | Zendy; Yanping Xi | Zendy; Dingshan Gao | Zendy; Qiaoyin Lu | Zendy; Weihua Guo | Zendy

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Design and simulation of two-section DFB lasers with short active-section lengths

Author(s) -

Gongyuan Zhao,

Junqiang Sun,

Yanping Xi,

Dingshan Gao,

Qiaoyin Lu,

Weihua Guo

Publication year - 2016

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.24.010590

Subject(s) - optics , bandwidth (computing) , laser , section (typography) , reflection (computer programming) , materials science , semiconductor laser theory , active layer , optoelectronics , physics , computer science , telecommunications , layer (electronics) , programming language , operating system , thin film transistor , composite material

Distributed feedback lasers comprised of a reflection section and an active section have been proposed for high direct-modulation bandwidth. The reflection section has the same core layer as the active section so butt-joint re-growth is avoided. Without current injection the reflection section will be pumped to near transparency by the emission from the laser itself so high reflection (> 0.75) can still be achieved as confirmed by the simulation. Therefore a short (150 µm) active section can be used, which enables a low threshold current (~5 mA) and a high direct modulation bandwidth (>30 GHz) as demonstrated by the simulation.

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