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Parallel Optics

Long-wavelength VCSELs have fundamental cost advantages over traditional edge-emitting laser diodes and are capable of transmitting high-data communications transfers over long distances. These devices can be used in a variety of datacommunications, telecommunications and high-end computing applications, all of which require scalability to higher data rates and increased distance at a low cost.

Current 1550 nm laser diodes are edge-emitting devices (EEL) of either Fabry-Pérot (FP) or distributed-feedback (DFB) laser types. A 1550 nm VCSEL has significant advantages over edge-emitting lasers with regards to costs for manufacturing, packaging, aligning and testing. Other benefits include lower power consumption and higher reliability. VCSELs can also be manufactured in arrays to maximize package density and bandwidth performance.

Long-wavelength VCSELs offer the same cost advantages as short-wavelength VCSELs as well as the ability to transmit data over long distances via singlemode fibers.

  • circular output beam with a small divergence angle
  • fast modulation rates
  • lower threshold currents and voltage
  • wafer-scale fabrication and testing
  • Integrability into 1-D and 2-D arrays

Parallel Optics

In addition to wavelength-division multiplexing (WDM), the space division multiplexing (SDM) approach, better known as parallel optics, is also already an established application.

Long-wavelength VCSELs also have their place in future parallel optical data links. Parallel optics is an emerging technology in which array components are used to create high-density, low-cost transmitters and receivers that are compatible with ribbon fiber cables and connectors. Parallel optics offer extremely high data-transfer rates required by scalable computers and broadband switches. This technology also provides a low-cost, high-density alternative to serial transceivers used for data-communications networking applications. VCSELs enable a cost-effective approach to realizing parallel fiber optic links.