Datasheet

4.4 I-V curve and emitted power

4.4.2. Maximum LDD voltage

Figure 4.6 shows the pulse peak current and emitted power as a function of the volt-

age fed to the LDD. In pulsed mode, the QCL operating current is controlled by the

LDD, which is itself controlled by changing its operating voltage. The maximum LDD

voltage is indicated by green squares on the emitted power curves; in this particular

case, the voltage must not exceed 15 VDC.

CAUTION:

The maximum operating LDD voltage is indicated in the ALPES

LASERS datasheet. Do not operate the LDD with a voltage above

those values; permanent damage may result.

Figure 4.6.: Peak voltage and averaged emitted power as a function of LDD voltage

of a DFB QCL operated in pulsed mode at different temperatures.

2012 SA 51