Analysis of detuned second-order grating output couplers with an integrated superlattice reflector

Author

Mehuys, David ; Hardy, Amos ; Welch, David F. ; Waarts, Robert G. ; Parke, Ross

Author_Institution

Spectra Diode Labs., San Jose, CA, USA

Volume

3

Issue

4

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

342

Lastpage

344

Abstract

Analysis is presented of second-order gratings at wavelengths detuned from the reflection bandwidth. These gratings have applications, for example, as surface-emitting output couplers in monolithic integrated master oscillator power amplifier (M-MOPA) configurations. The grating output couplers have reflectivities below 10/sup -4/ at an emission wavelength of 874 nm when the Bragg condition of the second-order grating occurs at 904 nm. When used in conjunction with a superlattice reflector integrated into the substrate, the surface emission can exceed 85% of the radiation incident on a 250 mu m long grating. Consequently, these gratings can act as nearly ideal output couplers in a M-MOPA without introducing undesirable feedback to the amplifier or master oscillator.<>

Keywords

diffraction gratings; integrated optics; optical couplers; semiconductor superlattices; 874 nm; 904 nm; AlGaAs; Bragg condition; detuned second-order grating output couplers; diode lasers; distributed feedback lasers; ideal output couplers; integrated superlattice reflector; monolithic integrated master oscillator power amplifier; reflectivities; substrate; surface-emitting output couplers; Couplers; Diffraction gratings; Distributed feedback devices; Laser feedback; Laser modes; Optical reflection; Oscillators; Reflectivity; Superlattices; Surface emitting lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.82106

Filename

82106