Packaging-induced strain measurement based on the degree of polarization in GaAsP-GaInP high-power diode laser bars

Ye Wang, Li Qin, Yan Zhang, Zhenhua Tian, Ye Yang, Zaijin Li, Chao Wang, Di Yao, Honghe Yin, Yun Liu, Lijun Wang

    Research output: Contribution to journalArticlepeer-review

    4 Scopus citations

    Abstract

    The strain caused by device packaging was studied in high-power semiconductor laser bars by measuring the degree of polarization. Polarization measurement with intentionally GaAsP-GaInP strained laser bar packaged on a Cu heat sink for 799-nm emission revealed the variation of band edges between the conduction band and heavy-hole or light-hole bands in the active region. This served as a method for evaluating the strain. In the packaging process, a maximum of 1800-ppm strain was transmitted to the active region. It was found that the defect density of 14.3% was induced.

    Original languageEnglish
    Pages (from-to)963-965
    Number of pages3
    JournalIEEE Photonics Technology Letters
    Volume21
    Issue number14
    DOIs
    StatePublished - Jul 15 2009

    Keywords

    • Laser modes
    • Semiconductor device packaging
    • Semiconductor laser arrays
    • Strain measurement

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