Del Mar Photonics - Newsletter December 2010 - Newsletter April 2011

Pacifica fs780pca - request a quote

THz time domain spectrometer for transmission measurements using a fs fiber laser source wavelength ~ 780 nm, pulse duration ~ 120 fs, repetition rate ~ 100 MHz, mean optical power of > 60 mW
consisting of:

Buccaneeer SHG femtosecond fiber laser
Wavelength: 780 ± 10 nm
Average output power: >65 mW
Pulse width: <120 fs
Repetition rate: 100 ± 1 MHz
Repetition rate instability:<1 ppm
Spatial mode: TEM00
Polarization: Linearly polarized (extinction ratio: PER>800:1)
RMS noise:<0.2%
Long term power drift over several hours:<5%
Full angle beam divergence:<1 mrad

• THz emitter and detector photoconductive antennas with aspheric focusing THz lenses with 50 mm THz beam focus length
• Optics for laser beams
• optical delay line for delay of 500 ps (<5 GHz resolution)
• breadboard 600 mm x 450 mm x 50.8 mm with the adjusted and tested THz spectrometer. The THz antenna distance is 100 mm. The THz focus is on the midpoint between the antennas
• Laptop with software T3DS, complete electronics with pulse generator, amplifier and lock-in detector. The software allows measurement of THz pulse and calculates in-situ the THz spectrum. It includes the calibration procedures for 100 % transmittance and the calculation of the spectral transmittance and absorbance of a sample.
• Instruction manual for the THz spectrometer and test report with the following data:
- Supply voltage 115 .. 230 V
- dynamic range > 60 dB
- useful spectral region 0.05 to > 3 THz
- scan range 500 ps (< 3 GHz resolution)
- THz focus position 50 mm away from the antennas
- Fast scan duration 10 s
- Slow scan duration 8 min

Optional: Spectrometer housing with closed sample box for nitrogen gas purging

Optional: Additional set of emitter and detector antenna with aspheric collimating THz lenses for 12 mm THz beam diameter for replacement of the antennas with focusing THz lenses

Lead time: 1 month

THz products:
THz Spectrometer kit with Antenna
THz transmission setup
THz detectors: Golay cell and LiTaO3 piroelectric detectors
PCA - Photoconductive Antenna as THz photomixer
Pacifica THz Time Domain Spectrometer - Trestles Pacifica
Holographic Fourier Transform Spectrometer for THz Region
Wedge TiSapphire Multipass Amplifier System - THz pulses generation
Terahertz Spectroscopic Radar Mobile System for Detection of Concealed Explosives
Band pass filters with center wavelengths from 30 THz into GHz range
Long pass filters with standard rejection edge wavelengths from 60 THz into GHz range
Generation of THz radiation using lithium niobate
Terahertz crystals (THz): ZnTe, GaP, LiNbO3 - Wedge ZnTe

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