Distributed feedback coupling coefficient in diode lasers with metallized gratings

Author

Luo, H.J. ; Zory, P.S.

Author_Institution

Dept. of Electr. Eng., Florida Univ., Gainesville, FL, USA

Volume

2

Issue

9

fYear

1990

Firstpage

614

Lastpage

616

Abstract

First-order distributed-feedback (DFB) evanescent coupling effects are investigated in heterojunction diode laser structures with integrated, metallized diffraction gratings. A closed-form expression for the DFB coupling coefficient kappa is derived using a ray optics technique. The expression can be evaluated easily since it depends only on the laser wavelength, the grating depth, and the parameters of the metallized planar waveguide. The validity of the expression is established by using a truncated Floquet-Bloch approach to compute kappa .<>

Keywords

diffraction gratings; distributed feedback lasers; geometrical optics; metallisation; semiconductor junction lasers; DFB coupling coefficient; diffraction gratings; diode lasers; evanescent coupling effects; grating depth; heterojunction diode laser structures; laser wavelength; metallized gratings; metallized planar waveguide; ray optics technique; truncated Floquet-Bloch approach; Closed-form solution; Diffraction gratings; Diode lasers; Distributed feedback devices; Heterojunctions; Metallization; Optical coupling; Optical diffraction; Optical feedback; Optical surface waves;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.59328

Filename

59328