Experimental investigation of wavelength-selective optical feedback for a high-power quantum dot superluminescent device with two-section structure | Zendy

Xinkun Li | Zendy; Peng Jin | Zendy; Qi An | Zendy; ZuoCai Wang | Zendy; Xueqin Lv | Zendy; Heng Wei | Zendy; Wu Jian | Zendy; Ju Wu | Zendy; Zhanguo Wang | Zendy

Open Access

Experimental investigation of wavelength-selective optical feedback for a high-power quantum dot superluminescent device with two-section structure

Author(s) -

Xinkun Li,

Peng Jin,

Qi An,

ZuoCai Wang,

Xueqin Lv,

Heng Wei,

Wu Jian,

Ju Wu,

Zhanguo Wang

Publication year - 2012

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.20.011936

Subject(s) - superluminescent diode , optics , optoelectronics , quantum dot , optical power , wavelength , broadband , diode , physics , waveguide , bandwidth (computing) , materials science , laser , telecommunications , computer science

In this work, a high-power and broadband quantum dot superluminescent diode (QD-SLD) is achieved by using a two-section structure. The QD-SLD device consists of a tapered titled ridge waveguide section supplying for high optical gain and a straight titled ridge waveguide section to tune optical feedback from the rear facet of the device. The key point of our design is to achieve the wavelength-selective optical feedback to the emission of the QDs' ground state (GS) and 1st excited state (ES) by tuning the current densities injected in the straight titled section. With GS-dominant optical feedback under proper current-injection of the straight titled region, a high output power of 338 mW and a broad bandwidth of 65 nm is obtained simultaneously by the contribution associated to the QDs' GS and 1st ES emission.

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