Second- and higher order resonant gratings with gain or loss-Part II: designing complex-coupled DFB lasers with second-order gratings

Author

Shams-Zadeh-Amiri, Ali M. ; Hong, Jin ; Li, Xun ; Huang, Wei-Ping

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

36

Issue

12

fYear

2000

Firstpage

1431

Lastpage

1437

Abstract

For part I see, ibid., p. 1421, (2000). This paper deals with the investigation of second-order DFB lasers with a gain grating. It is shown that by proper choice of the duty cycle, one may take advantage of the different radiation losses between the mode with the lowest threshold gain and the second mode to increase the single-mode yield and also obtain a strong complex-coupling with high external efficiency. The impact of the random phase of high-reflection (HR)-coated facet on modal properties in an anti-reflection and HR combination is also investigated.

Keywords

antireflection coatings; diffraction gratings; distributed feedback lasers; laser modes; optical films; optical losses; semiconductor lasers; anti-reflection coatings; complex-coupled DFB laser design; duty cycle; high external efficiency; high-reflection-coated facet; higher order resonant gratings; lowest threshold gain; modal properties; optical gain; optical loss; radiation losses; second-order resonant gratings; single-mode yield; strong complex-couplin; Etching; Gratings; Laser modes; Laser theory; Optical coupling; Optical design; Optical fiber communication; Quantum well lasers; Resonance; Semiconductor lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.892563

Filename

892563