Alpes Lasers . TC-3 Datasheet download pdf (Page 58)

Chapter 4: Operating QCLs in continuous wave mode 10

4 Operating QCLs in continuous wave mode

For electrical properties, see Section 2.2 [Electrical properties], page 3.

4.1 Thermal prope rties

The dissipated heat of a QC laser operated in CW mode is in the range of some Watts (operating

voltage in the 8V. . . 12V range, current in the 0.5A. . . 1.5A range). Keep in mind that in general,

the impedance of a QCL is decreasing with temperature!

4.2 Availability of CW lasers

CW QCLs are now commercially available for operation at cryogenic (LN2) temperatures (single-

and multi-mode devices). Availability of CW FP devices for operation at room temperature is

expected during 2004; currently no date for commercial availability of CW single-mode devices

at room temperature can be given.

State of the art in research is that experimental multimode devices have been shown working,

as well as DFB devices; however, better control of manufacturing is needed to make them

available as commercial products.

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Alpes Lasers . TC-3 Datasheet Page 58