TeraBeam
DFB Lasers for cw Terahertz Generation
• Two DFB pro lasers + digital frequency control
• Available wavelengths: 780 nm and 1.5 µm
• Difference frequency tuning up to 2 THz
• Frequency accuracy < 2 GHz, minimum step size < 10 MHz
• Computerized frequency tuning via Ethernet
Each TeraBeam system comprises two distributed feedback (DFB) lasers with built-in optical isolators and fiber-optic beam combination. Available at 780 nm and 1.5 µm, the TeraBeam matches the excitation wavelengths of GaAs and InGaAs terahertz emitters, respectively. TOPTICA carefully selects the laser diodes with respect to their thermal tuning range. The DLC Smart controls the temperatures of both lasers with unmatched precision.
Applications
• Plastic Inspection
• Paint and coating layers
• Paper quality control
• Hydration monitoring
• Communication
• Ultrafast dynamics
• Gas sensing
• Fundamental physics
Specifications
Wavelength range* 783 + 785 nm 1533 + 1538 nm Laser power
> 40 mW (per two-color fiber output)
25 - 30 mW (per two-color fiber output)
Difference frequency tuning
0 - 1.8 THz (2.0 THz typ.)
0 - 1.2 THz (up to 2.7 THz with Tuning Range Extension)
Tuning speed
Up to 100 GHz/sec
Frequency accuracy
< 2 GHz
Minimum frequency step size
< 10 MHz
Frequency stability per laser*
Typ. 20 MHz RMS, 100 MHz p-p @ 5 hrs
Laser size and weight
Two DFB pro L laser heads,
each with dimensions
90 x 90 x 244 mm (H x W x D), 2,8 kg
Two DFB pro BFY laser heads,
each with dimensions
60 x 120 x 165 mm (H x W x D), 1 kg
Control unit
DLC smart
Controller size and weight
19" and 1 RU (H x W x D: 45 x 480 x 290 mm), 4 kg
Laser diode warranty
5000 hrs or 2 years (whatever comes first)
*At constant environmental conditions