High Power Diode Lasers - Center for Biomedical Optics and New ...
High Power Diode Lasers - Center for Biomedical Optics and New ...
High Power Diode Lasers - Center for Biomedical Optics and New ...
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Si 3 N 4 , SiO 2<br />
Process : why <br />
To define a surface where the current is injected<br />
Typical threshold current density of a laser diode J th<br />
~ 100 A/cm 2 to 1 kA/cm²<br />
To minimize it, we reduce the injection surface!<br />
Active region<br />
contact<br />
~<br />
Substrate<br />
~<br />
process<br />
~<br />
Substrate<br />
~<br />
EPITAXY<br />
size = 1 - 100<br />
mm<br />
Laser surface = 1 cm 2 I th = 100A to 1000 A !<br />
Laser surface = 100 µm x 1 mm = 10 -3 cm 2<br />
I th = 100 mA to 1 A
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