22 GHz-bandwidth 1.5 μm compressively strained InGaAsP MQW ridge-waveguide DFB lasers

14 October 1993

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 29 (21) , 1848-1849
https://doi.org/10.1049/el:19931230

Abstract

A DFB laser with a modulation bandwidth of 22 GHz together with a sidemode suppression in excess of 50 dB is reported. The wide bandwidth is achieved by using a doped SCH region which is sufficiently thick to accommodate a DFB grating, and a ridge-waveguide structure with patterned p-side metallisation to give very low parasitic capacitance. A differential gain of 25×10⁻¹⁶cm² is reported for the doped strained MQW structure used.

Keywords

PARASITIC CAPACITANCE
COMPRESSIVELY STRAINED
PATTERNED P-SIDE METALLISATION
1.5 MICRON
MODULATION BANDWIDTH
SIDEMODE SUPPRESSION
DOPED SCH REGION
INGAASP
MQW RIDGE-WAVEGUIDE DFB LASERS
22 GHZ