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 language | English |
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Pages (from-to) | 963-965 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 21 |
Issue number | 14 |
DOIs | |
State | Published - Jul 15 2009 |
Keywords
- Laser modes
- Semiconductor device packaging
- Semiconductor laser arrays
- Strain measurement