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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Laser diode with an enlarged active region : advantages<br />
Wider transverse near-field (> 0.5 µm) : COMD level increased.<br />
Weak internal losses (< 1 cm -1 ):<br />
<strong>High</strong> external differential efficiency<br />
Longer cavity are possible (> 1 mm): thermal <strong>and</strong> electrical<br />
resistivities are decreased<br />
<strong>Power</strong> <strong>and</strong> efficiency record in CW<br />
Usual cavity<br />
(Thershold current minimized)<br />
1,0<br />
Enlarged cavity :<br />
Γclad => α<br />
Γqw => COMD<br />
Refractive index, Near field intensity<br />
p Cladding<br />
QW<br />
QW<br />
nid waveguide<br />
n Cladding<br />
Refractive index, Near field intensity<br />
0,8<br />
0,6<br />
0,4<br />
0,2<br />
0,0<br />
-0,2<br />
QW<br />
p Cladding<br />
nid Broad Waveguide<br />
n Cladding<br />
-4 -2 0 2 4<br />
Distance<br />
Distance
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