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Proceedings Paper

Monolithic integration of MQW wavelength tunable DBR lasers with external cavity electroabsorption modulators by selective-area MOCVD
Author(s): Robert M. Lammert; Gary M. Smith; J. S. Hughes; Mark L. Osowski; A. M. Jones; James J. Coleman
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Paper Abstract

The design and operation of multiple-quantum well (MQW) wavelength tunable distributed Bragg reflector (DBR) lasers with nonabsorbing gratings and monolithically integrated external cavity electroabsorption modulators fabricated by selective-area metal-organic chemical vapor deposition (MOCVD) are presented. Uncoated devices exhibit cw threshold currents as low as 10.5 mA with slope efficiencies of 0.21 W/A from the laser facet and 0.06 W/A from the modulator facet. After the application of facet coatings, slope efficiencies from the modulator facet increase to 0.14 W/A. Wavelength tuning of 7 nm is obtained by injection current heating of the DBR section. These devices exhibit extinction ratios of 18 dB from the modulator facet at a low modulator bias of 1 V, when measured with a broad-area detector. When coupled to a singlemode fiber, these devices exhibit high extinction ratios of 40 dB at a modulator bias of 1.25 V. Photo-generated current versus optical power plots indicate that the extinction ratios are not limited by carrier build- up in the modulator quantum wells.

Paper Details

Date Published: 30 January 1997
PDF: 11 pages
Proc. SPIE 2918, Emerging Components and Technologies for All-Optical Photonic Systems II, (30 January 1997); doi: 10.1117/12.265362
Show Author Affiliations
Robert M. Lammert, Univ. of Illinois/Urbana-Champaign (United States)
Gary M. Smith, Univ. of Illinois/Urbana-Champaign (United States)
J. S. Hughes, Univ. of Illinois/Urbana-Champaign (United States)
Mark L. Osowski, Univ. of Illinois/Urbana-Champaign (United States)
A. M. Jones, Univ. of Illinois/Urbana-Champaign (United States)
James J. Coleman, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 2918:
Emerging Components and Technologies for All-Optical Photonic Systems II
Emil S. Koteles; Alan Eli Willner, Editor(s)

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