QS1-370 & QS1-710 Based THz Sources

THz Generators: QS1-370 and QS1-710 Based THz Sources

    • Operating frequency range of QS1-370 (180-370 GHz) can be extended to 1150 GHz, using frequency multipliers. A frequency tripler designed QS1-710 BWO extends operation of this source to 1800-2100 GHz range.Typical maximum power across different ranges is shown in the table below.

 

QS1_370_02
QS1_370_04
QS1_370_06
QS1_370_08
QS1_370_10
QS1_370_12
QS1_370_14
QS1_370_15 QS1_370_16
Notes: Operation of QS1-370 and QS1-710 based sources requires VR-6M power supply, MS-X.X magnetic system and BWO water cooling system.

Terahertz Parametric Oscillators

Terahertz Parametric Oscillators (TPOs)

The TPO systems are based on difference frequency generation in quasi-phase matched GaAS crystals placed inside an optical parametric oscillator (OPO) pumped by an ultrafast fiber laser. It generates 6-10 ps THz pulses at repetition rate of 80 MHz, delivering up to 1 mW average power and 1.5 W peak power. Central wavelength of 0.85 or 1.5 THz and spectral width of 100 GHz fits perfectly into the atmospheric transmission windows, making these sources ideal for THz imaging application. Very high peak powers make the TPO suitable for imaging systems employing non-linear effects, while sufficient average power makes it suitable for thermal detector array imaging as well.

MODEL CENTRAL FREQUENCY SPECTRAL WIDTH DURATION AVERAGE POWER PEAK POWER
TPO-850 0.85 THz <200 GHz 8+ 2ps 100uW 150 mW
TPO-1500 1.5 THz <200 GHz 8+ 2ps 100uW 150 mW
TPO-1500 HP 1.5 THz <200 GHz 8+ 2ps 1mW 1.5W

Download Data Sheet

Download Application PDF

Compact THz Spectrometer

Polarization RotatorCompact THz Spectrometers offered by Microtech Instruments, Inc. enable transmission measurements in the spectral range of 100 GHz to 1.5 THz. These systems are based on millimeter wave Backward Wave Oscillators (BWO’s) combined with frequency multipliers and broadband Pyroelectric Detectors.

THz spectrometers offered by Microtech Instruments enable high-resolution spectroscopic measurements in the spectral range from 180 GHz to 1.42 THz. These systems employ frequency tunable Backward Wave Oscillators (BWOs) as sources of THz radiation and Golay Cells as detectors.

Key features include:
Spectral Range: 100 GHz – 1.5 THz
• Spectral Resolution: 1 – 10 MHz
• Dynamic Range: 10^4

Model Operating Spectral Range
TScan-260 180 – 260 GHz
TScan-370 180 – 370 GHz
TScan-1100 180 – 1100 GHz
TScan-1250 180 – 1250 GHz
TScan-1420 180 – 1420 GHz

 

THz SPECTROMETERS

Imaging Systems

Raster Scan Imaging System

Polarization RotatorThis Microtech THz imager uses a similar optical set up as the transmission spectrometer, but utilizes linear stages for holding and moving an object in the focal point of a THz beam. The central focal point ensures good resolution for hte imager and allows for a high dynamic range by focusing the whole signal through an object at a small point.

Key features include:

  • Can be used with both BWO and TPO sources
  • Comes with easy-to-use software
  • Ideal for non-destructive evaluation

 

T-Vision: Video Rate Imaging System

T-Vision imaging system is the solution for imaging applications that require high frame rates. The T-Vision system is an all-in one system, integrating our TPO generator with imaging optics. The imaging is based on a nonlinear process, where hte THz image is mixed with a near-IR pulse, generating an upconverted near-IR image that is detected with a CMOS camera. This system can be customized to suit your needs – let us know what your application requires and we will do our best to meet your specifications.

 

Download Movie: Leaf

Download Movie: Concealed Objects

Download Movie: Internal Defect in Plastic

 

THz Spectrometers

Compact THz Spectrometer:

Polarization RotatorCompact THz Spectrometers offered by Microtech Instruments, Inc. enable transmission measurements in thespectral range of 100 GHz to 1.5 THz. These systems are based on millimeter wave Backward Wave Oscillators (BWO’s) combined with frequency multipliers and broadband Pyroelectric Detectors.

THz spectrometers offered by Microtech Instruments enable high-resolution spectroscopic measurements in the spectral range from 180 GHz to 1.42 THz. These systems employ frequency tunable Backward Wave Oscillators (BWOs) as sources of THz radiation and Golay Cells as detectors.

Key features include:
Spectral Range: 100 GHz – 1.5 THz
• Spectral Resolution: 1 – 10 MHz
• Dynamic Range: 10^4

Model Operating Spectral Range
TScan-260 180 – 260 GHz
TScan-370 180 – 370 GHz
TScan-1100 180 – 1100 GHz
TScan-1250 180 – 1250 GHz
TScan-1420 180 – 1420 GHz

 


THz Transmission Spectrometer:

Polarization RotatorTransmission measurement is the best method for characterization of highly transparent materials. In particular, transmission spectra of plane parallel plates exhibit a periodic transmission pattern caused by interference (Fabry-Perot etalon fringes). Real and imaginary parts of the dielectric constant can be determined from these measurements, as the period and amplitude of the etalon fringes depend on the material refractive index and absorption, respectively.

Characterization of semi-transparent materials requires a THz Mach-Zehnder interferometer (shown below), since no etalon fringes can be observed in the transmission spectra of such materials. The Mach-Zehnder setup enables measurements of a phase shift induced by the sample as a function of frequency. Combining this data with transmission spectrum, real and imaginary parts of the dielectric constant can be calculated.


THz Mach-Zehnder Spectrometer:

Polarization RotatorCharacterization of semi-transparent materials requires a THz Mach-Zehnder inferometer (shown below), since no etalon fringes can be observed in the transmission spectra of such materials. The Mach-Zehnder setup enables measurements of a phase shift induced by the sample as a function of frequency. Combining this data with transmission spectrum, real and imaginary parts of the dielectric constant can be calculated.

Highly absorptive materials can only be characterized in a reflection geometry, illustrated below.

 


THz Reflection Spectrometer:

Polarization RotatorOpaque materials characterization requires the reflection spectrometer (shown above). Because the transmitted signal is too small for characterization, a system using 6-axis control is employed to measure the reflected signal. As with the transmission and phase spectrometers the index of refraction, extinction coefficient and the real and imaginary parts of the dielectic function can be quickly calculated from the software’s theoretical fitting capacity.

The transmission, Mach-Zehnder and reflection spectrometers are supported by TScan software, enabling automated data acquisition and analysis. One spectral scan takes 1 – 5 minutes for each of the BWOs employed in the system.

Detailed specifications and pricing are available on request at sales@mtinstruments.com

MULTI-WAVELENGTH ULTRAFAST LASER SYSTEMS

FPPO-ps and FPPO-fs


Fiber Laser Pumped Picosecond and Femtosecond Optical Parametric Oscillators:

Product Description & Components:


The FPPO product line supplies tunable, multiple wavelength outputs from a fiber laser pumped, optical parametric oscillator.  Two versions are available: the FPPO-ps, which delivers 6 ps pulses, and the FPPO-fs, which delivers 300 fs pulses.  Both systems offer near continuous tunability from 730 – 2000 nm from the OPO signal and idler beams, as well as 532 nm and 1064 nm light from the pump laser.  Possible applications of these versatile laser systems include:  multi-photon imaging, pump-probe spectroscopy, fluorescence spectroscopy and Raman imaging and spectroscopy.

Specifications:


Parameter FPPO-fs FPPO-ps
Pulse Duration < 350fs < 6ps
Bandwidth > 50cm-1 < 10cm-1
Time bandwidth product ~0.6 ~0.5
Power 100 mW – 800 mW 100 mW – 500 mW
Center wavelength 730 nm – 1000 nm (signal)
1150 nm – 2000 nm (idler)
740 nm – 1000nm (signal)
1150 nm – 1800 nm (idler)
M2 FPPO-fs FPPO-ps
Polarization < 350fs < 6ps
Repetition Rate FPPO-fs FPPO-ps

Download Datasheet for FPPO-fs

Download Datasheet for FPPO-ps

Download FPPO-ps Manual

Download FPPO-ps Application Notes

Download FPPO-fs Application Notes

THz DETECTORS


Golay Cells are opto-acoustic detectors featuring:Polarization Rotator• Operation across a wide spectral range of 0.02-20 THz
• High responsivity 104 V/W
• Wide dynamic range 100 nW – 1 mW
Operation of Golay Cells is based on measuring vibrations in a gas cell caused by THz radiation heating. These are very stable and reliable detectors that are used in numerous research labs worldwide.

Download Datasheet


Pyroelectric Detector:Polarization RotatorThe pyro-electric detector based on LiTaO3 crystal, is designed for registration of modulated electromagnetic radiation in the millimeter and sub-millimeter wavelength range.

 

 


Polarization RotatorNEW: Microtech Instruments now carries Terasense Terahertz Camera

 

Download Datasheet

Pricing information is available on request at sales@mtinstruments.com


THz Imaging Acquisition Software:

Polarization RotatorNew THz Imaging Acquisition Software, compatible with the DAU-3, boosts the performance of Golay Cells and Pyroelectric Detectors.

 

 

Download Imaging Software Users Manual (PDF, 1.11 MB)

Pricing information is available on request at sales@mtinstruments.com

THz GENERATORS

Terahertz Parametric Oscillators (TPOs)

The TPO systems are based on difference frequency generation in quasi-phase matched GaAS crystals placed inside an optical parametric oscillator (OPO) pumped by an ultrafast fiber laser. It generates 6-10 ps THz pulses at repetition rate of 80 MHz, delivering up to 1 mW average power and 1.5 W peak power. Central wavelength of 0.85 or 1.5 THz and spectral width of 100 GHz fits perfectly into the atmospheric transmission windows, making these sources ideal for THz imaging application. Very high peak powers make the TPO suitable for imaging systems employing non-linear effects, while sufficient average power makes it suitable for thermal detector array imaging as well.

tpotable

Download Data Sheet

Download Application PDF

THz Generators: QS1-260 Based THz Sources

Operating frequency range of QS1-260 (160-260 GHz) can be extended to 2100GHz, using frequency multipliers. Typical maximum power across different ranges is shown in the table below.

QS1_260_02
QS1_260_04
QS1_260_06
QS1_260_08
QS1_260_10
QS1_260_12
QS1_260_14
QS1_260_16
QS1_260_18
QS1-260-2100-HP
QS1_260_20
Notes: Operation of QS1-260 based sources requires VR-6M power supply, MS-X.X magnetic system and BWO water cooling system.

 

    To download data sheets, please click on the model number.

THz Generators: QS1-370 and QS1-710 Based THz Sources

    • Operating frequency range of QS1-370 (180-370 GHz) can be extended to 1150 GHz, using frequency multipliers. A frequency tripler designed QS1-710 BWO extends operation of this source to 1800-2100 GHz range.Typical maximum power across different ranges is shown in the table below.

 

QS1_370_02
QS1_370_04
QS1_370_06
QS1_370_08
QS1_370_10
QS1_370_12
QS1_370_14
QS1_370_15 QS1_370_16
Notes: Operation of QS1-370 and QS1-710 based sources requires VR-6M power supply, MS-X.X magnetic system and BWO water cooling system.

 

THz Generators: QS2-180 Based THz Sources

Operating frequency range of QS2-180 (100-180 GHz) can be extended to 1500 GHz, using frequency multipliers.
Typical maximum power across different ranges is shown in the table below.

QS2-180
QS2-350
QS2-500
QS2-1000
QS2-1500
QS2-1500-HP
Notes: Operation of QS2-180 based sources requires VR-3M power supply.

 
To download data sheets, please click on the model number.

BWO Power Supplies:

Polarization RotatorVR-series power supplies provide for highly stabilized cathode voltage ranging from 0 to 6000V, as well as BWO grid and heater voltages.

The software package (“EPSILON”) and digital-to-analog converter (DAC-16) enable user-friendly
control of the system via RS-232 or GPIB interfaces.

Download PDF

BWO Magnets:

Polarization RotatorThe MS-X.X magnetic systems are designed to house high frequency BWO’s operating in the spectral
range 0.18 – 1.42 THz.

The systems include a permanent magnet with inputs for BWO electrical
connections and the water cooling system. The MS-1.2 and MS-1.3 models are also equipped with
a 2-axis mechanical rotation stage for centering the BWO in the magnetic field.

Download PDF

Model # Magnetic Field (Tesla) Size (inches) Weight (lbs) Designed for
MS-0.6 0.6 7 x 7 x 7 30 QS1-260
MS-0.7 0.7 9 x 9 x 9 60 QS1-370
MS-1.3 1.3 12 x 12 x 12 110 all models

Relevant Datasheets:

BWO Cooling System Datasheet (PDF, 33 KB)
Download PDF