Terraced substrate inner stripe visible semiconductor laser and its arrays

Lasers emitting in the range of 7500-7800 AA, which have average current thresholds of 30-40 mA and maintain single transverse mode operation up to 20 mW, are reported. Life tests show that the lasers have almost no threshold change after 3000 h of aging at 4-mW CW operation. The terraced substrate inner stripe laser arrays have clean single-lobe far-field patterns with full width at half power of 6 degrees in CW operation and 2.4 degrees in pulsed operation.<
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