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Photonic Crystals Integrated into VCSELs

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Single-fundamental-mode vertical-cavity surface-emitting lasers (VCSELs) could benefit data transmission applications, but designing such a device to function over an entire pump range is difficult because of eventual material deformations such as thermal lensing. A team from the Korea Advanced Institute of Science and Technology in Taejon has integrated a single-defect photonic crystal -- with a 5-µm-hole pitch and a 3.5-µm-hole diameter -- into the top mirror of an 850-nm VCSEL to produce a side-mode suppression ratio of 35 to 40 dB. This method has allowed continuous-wave,...Read full article

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    Published: August 2002
    Research & TechnologyTech PulseLasers

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