Datasheet

1.5 Fields of applications
1.5.2. THz
Terahertz radiation is safe and non-ionizing. It bridges the gap between the mid-
infrared and microwaves. It can penetrate most non-conductive materials and can be
used in a wide range of applications:
• Water content mapping
• Tissue density mapping
• Metals detection
• Spectral identification
Terahertz QCLs operate in the range from 1 to 6 THz. Coherent polarized THz
radiation is generated by means of direct stimulated optical transitions of electrons
within the conduction band of a semiconductor heterostructure. THz lasers need
cryogenic cooling but at temperatures higher than 77K (boiling point of liquid nitrogen),
making their operation non-prohibitive in terms of cooling equipment.
ALPES LASERS THz QCLs are available as CoC or readily mounted in a variable
temperature cryostat. ALPES LASERS offers three types of cryogenic system solu-
tions:
• LN
2
dewar
• cryostat
• standalone
Contact ALPES LASERS for more details.
Note: THz QCLs are not pre-tested; contact ALPES LASERS to discuss the require-
ments for a specific application.
c
2012 SA 15