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Proceedings Paper

Wavelength engineering of surface-emitting lasers for high-capacity short-reach systems
Author(s): Fumio Koyama
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Paper Abstract

In this paper, we present the wavelength engineering of surface emitting lasers for use in high speed short reach systems, which may include the wavelength expansion, the wavelength integration and the wavelength stabilization based on fully monolithic VCSEL technologies. We have developed highly strained GaInAs/GaAs QW VCSELs emitting at 1.1-1.2 μm band and GaInNAs/GaAs VCSELs at 1.3 μm wavelength. Excellent temperature characteristics have been realized. We extended the emission wavelength of highly strained GaInAs QWs up to 1.2 μm and demonstrated low threshold operations of 1.3 μm GaInNAs lasers grown by MOCVD. We carried out the growth of highly strained GaInAs/GaAs quantum wells on a patterned substrate for realizing multiple wavelength VCSEL arrays in a wide wavelength span. We demonstrated a single-mode multiple-wavelength VCSEL array on a patterned GaAs substrate covering a new wavelength window of 1.1- 1.2 μm. By optimizing a pattern shape, we achieved multiple-wavelength operation with widely and precisely controlled lasing wavelengths. The maximum lasing span is over 190 nm. We proposed and demonstrated a micromachined tunable vertical cavity with a stress control layer, which gives us novel functions including temperature insensitive operation, thermal wavelength tuning, and so on. Either temperature insensitive operation or wide wavelength tuning induced by temperature change can be realized. The temperature insensitive VCSEL based on this technology may be helpful for decreasing the channel spacing in coarse WDM systems. We demonstrated long wavelength GaInAs and GaInNAs VCSELs on GaAs substrates, enabling uncooled operation for high speed data transmission in single-mode fibers. The multiple-wavelength array and wavelength engineering of VCSELs may open up ultra-high capacity short reach systems.

Paper Details

Date Published: 14 August 2003
PDF: 9 pages
Proc. SPIE 5246, Active and Passive Optical Components for WDM Communications III, (14 August 2003); doi: 10.1117/12.510564
Show Author Affiliations
Fumio Koyama, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 5246:
Active and Passive Optical Components for WDM Communications III
Achyut K. Dutta; Abdul Ahad S. Awwal; Niloy K. Dutta; Kazuo Fujiura, Editor(s)

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