Groove-cell analysis of distributed feedback lasers

Author

Barabas, U.

Author_Institution

Fakultat fuer Elektrotech., Univ. der Bundeswehr Munchen, Neubiberg, Germany

Volume

28

Issue

5

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

1269

Lastpage

1276

Abstract

The propagation of waves in a groove cell is analyzed. This propagation is a function of transfer matrix, which contains the gain, together with the phase constant, the length of a groove cell, and the groove reflection coefficient. When the transfer matrix is cascaded the transmission of an optical field and the reflection coefficient of a distributed feedback structure can be determined even with unequal grooves and any groove number. With the help of an eigenvalue equation the threshold gain and phase constant of the resonator modes are determined for a symmetrical laser. The increase of threshold gain is demonstrated for an inhomogeneous laser with changed mean value of effective refractive index along the laser length. Bloch waves exist in a long grating (or a closed loop) of periodic grooves

Keywords

distributed feedback lasers; laser cavity resonators; laser modes; Bloch waves; distributed feedback lasers; distributed feedback structure; effective refractive index; eigenvalue equation; groove cell analysis; groove number; groove reflection coefficient; inhomogeneous laser; laser length; optical field; periodic grooves; phase constant; propagation; resonator modes; symmetrical laser; threshold gain; transfer matrix; transmission; Distributed feedback devices; Laser feedback; Laser modes; Laser transitions; Linear matrix inequalities; Optical propagation; Optical reflection; Optical resonators; Quantum cascade lasers; Symmetric matrices;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.135267

Filename

135267