Alpes Lasers Cascade Laser Starter Kit Datasheet download pdf (Page 19)

Chapter 5

General QCL questions

This chapter discusses some general properties of QC lasers, mainly concerning opti-

cal behavour. For additional information, see ”Electro-optical”.

5.1 How to measure QC laser emission?

At Alpes Lasers SA, the following methods are used for detection and qualiﬁcation of

QC laser emission:

Power meter

To measure power, semiconductor power meters are used, in particular the com-

bination of power head 2A-SH with meter AN/2 from OPHIR(www.ophir.com).

Spectrometer

Standard measurements are done with TRIAX320 monochromators from Jobin

Yvon (http://www.jobinyvon.com), special (high resolution and CW) measurements

with Nicolet 800 and 860 FTIR (www.nicolet.com).

Fast detectors

For time-critical measurements, Alpes Lasers SA recommends detectors from

VIGO SYSTEMS (www.vigo.com.pl).

Monitoring

For monitoring laser emission, simple pyroelectric detectors can be used, e.g

LGTP101 by MemTek (memtek.lgcit.com).

5.2 General emission characteristics

5.2.1 What wavelengths can be reached?

QC devices have been shown to be capable of operating between 3.44 and 84um. De-

vices with wavelength ranging from 4.2 to 11 um are currently available. Nevertheless

we encourage you to discuss your needs if they lay outside this range.

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Alpes Lasers Cascade Laser Starter Kit Datasheet Page 19