Single-frequency, single-spatial-mode ROW-DFB diode laser arrays

Author

Nesnidal, M.P. ; Mawst, L.J. ; Bhattacharya, A. ; Botez, D. ; DiMarco, L. ; Connolly, J.C. ; Abeles, J.H.

Author_Institution

Dept. of Electr. Eng., Wisconsin Univ., Madison, WI, USA

Volume

8

Issue

2

fYear

1996

Firstpage

182

Lastpage

184

Abstract

Single-frequency, stable single-spatial-mode operation from large-aperture (40-60 μm) index-guided devices is demonstrated from resonant antiguided phase-locked InGaAs-InGaP-GaAs diode-laser arrays incorporating 2nd-order distributed-feedback gratings (i.e., ROW-DFB arrays). The devices operate in a single-spatial-mode up to 3.6×threshold, and truly single-mode (i.e., single-spatial-mode and single-frequency) up to 2×threshold, For 40 (60)-μm-aperture 10-element arrays, the beam pattern is in-phase and diffraction-limited with 70% (75%) of the power residing in the main lobe. Single-frequency operation is obtained from 9640-9652 /spl Aring/, over a temperature range of approximately 20/spl deg/C, side-mode suppression ratios /spl ges/20 dB are recorded up to 2×threshold.

Keywords

III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; laser frequency stability; laser mode locking; laser modes; semiconductor laser arrays; semiconductor lasers; waveguide lasers; 20 C; 2nd-order distributed-feedback gratings; 40 to 60 mum; 9640 to 9652 A; InGaAs-InGaP-GaAs; ROW-DFB arrays; ROW-DFB diode laser arrays; beam pattern; diffraction-limited; in-phase; large-aperture index-guided devices; main lobe; resonant antiguided phase-locked InGaAs-InGaP-GaAs diode-laser arrays; side-mode suppression ratios; single-frequency; single-spatial-mode; stable single-spatial-mode operation; truly single-mode; Apertures; Diffraction; Diode lasers; Frequency; Gratings; Laser modes; Optical arrays; Phased arrays; Power generation; Semiconductor laser arrays;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.484234

Filename

484234