Page 145 - High Power Laser Handbook
P. 145
114 Diode Lasers Semiconductor Laser Diodes 115
40
Light output (mW) 30 dL/dl (a.u.)
20
10
0
0 20 40 60 80 100
Current (mA)
(a)
Above
kink
Below
kink
Intensity (a.u.)
−20° −10° 0° 10° 20°
θ
(b)
Figure 5.14 (a) Light output and dL/dl curves around kink, (b) far-field data
below and above kink power level. 29
kink power is an important design optimization for single-mode
32
lasers. Typically, to increase kink power, the stripe width must be
narrowed to filter out higher-order modes. On the other hand, nar-
rower stripe width leads to lower slope efficiency of the device due to
higher loss of the fundamental mode. This trade-off leads to design
