Self-aligned bend waveguide (SBW) AlGaInP visible laser diode with small beam astigmatism

The self-aligned bend waveguide (SBW) AlGaInP visible laser developed produces an index guiding waveguide structure by the bend of the double heterolayers and offers a very small beam astigmatism. The laser was fabricated using two-step metalorganic vapor phase epitaxy (MOVPE). Kink-free operation at 40 mW was achieved by modifying the device parameters. The measured beam astigmatism was maintained at less than 1 mu m and did not vary with output power. The aging results under the condition of 50 degrees C and 20 mW output power demonstrated the laser's reliability.<
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