20-year milestone special promotional offer

Microtech is celebrating 20-year milestone with a special promotional offer. Eugene, OR, May 16, 2016. Microtech Instruments is proud to announce a special offer to celebrate its 20th anniversary coming up this September- a 20% discount on select THz products. This offer begins June 1 st and lasts until the end of 2016. Microtech products included in this offer are all high power THz sources, Detectors, Spectrometers, and Imaging Systems including the new video-rate T-Vision system. Microtech’s T-Vision is based on the TPO, a high power optically generated THz source, and provides a unique solution for imaging at frequencies at 1.5 THz. Several THz movies produced using T-Vision are playing on our home page: www.mtinstruments.com If you are interested in scheduling a call with one of our engineers or requesting pricing information, please contact Renee Isley at renee@mtinstruments.com About Microtech Instruments, Inc. Microtech Instruments is a manufacturer of advanced scientific instruments for Terahertz imaging and spectroscopy applications. Serving the global scientific community for almost 20 years, Microtech Instruments established a strong reputation for delivering highly functional and reliable products. Committed to innovation, Microtech collaborates with leading research organizations and major industrial companies worldwide. For more information please visit www.mtinstruments.com

THz Polarizers

The Polarization Rotator is a wire grid polarizer combined with a mounted mirror placed at an adjustable distance behind the polarizer. It is designed to take an incoming linearly polarized signal and adjust the polarization elliptically.

Download Polarization Rotator Datasheet

Free Standing Wire Grid Polarizers

    • These polarizers are made of 10 µm, 15 µm or 20 µm tungsten wire wound on a circular frame with spacing ranging from 25 µm to 200 µm.

Download Datasheet

Download Wire Grid Polarizer Drawing, Top & Side View (PDF 28.2 KB)

Ordering Information:

Polarizer Model Wire diameter / Wire spacing (mm) Clear aperture / External diameter (mm)
G25 x 10-S 10 / 25 40 / 50
G30 x 10-S 10 / 30 40 / 50
G30 x 10-L 10 / 30 88 / 98
G45 x 10-S 10 / 45 40 / 50
G45 x 10-L 10 / 45 88 / 98
G50 x 20-S 20 / 50 40 / 50
G50 x 20-L 20 / 50 88 / 98
G60 x 15-S 15 / 60 40 / 50
G60 x 15-L 15 / 60 88 / 98
G80 x 15-S 15 / 80 40 / 50
G80 x 15-L 15 / 80 88 / 98
G100 x 20-S 20 / 100 40 / 50
G100 x 20-L 20 / 100 88 / 98
G200 x 20-S 20 / 200 40 / 50
G200 x 20-L 20 / 200 88 / 98

 

Thin Film Polarizers

Thin Film Terahertz Polarizers are designed for applications in the 0.1-3.0 THz range. The polarizers consist of any array of metal stripes fabricated on a polymer membrane using an ultrafast laser micromachining technique. Typical stripe widthand spacing are about 15um. THz thin film polarizers provide performance comparable to free-standing wire grids, such as G25S and G30S, made of 10um wires spaced by 25um and 30um respectively.

The main advantage of thin film THz polarizers is significantly larger clear aperture – up to 85mm in diameter. For comparison, the G25S and G30S free-standing wire grid polarizers are only available with clear apertures of 40mm.

table

graph

Download PDF

 

 

Polarizer Holders

We carry two types of rotating holders for the wire grid polarizers or thin film polarizers.

Model RH1 is designed for 4″ diameter polarizers, and enables a 360° rotation.

Model RH2 is designed for 4″ diameter polarizers, and enables 2-axis adjustments and 360° rotation.

THz Band Pass Filters

Band-Pass filters allow for the selection of narrow bands in the frequency ranges of 0.1-1.2 THz. These filters utilize multilayer frequency selective surfaces to achieve a desired frequency response. The allowed bandwidth varies with center frequency, from 10 GHz to 200 GHz.

Download Datasheet

POLARIZER MODEL CENTER LINE (GHz) Transmission Band FWHM (GHz) CLEAR APERTURE PEAK TRANSMISSION
BP-0112 112 13.4 70 92%
BP-0132 132 15.8 70 92%
BP-0156 156 18.7 70 92%
BP-0188 188 22.6 70 92%
BP-0224 224 26.9 70 92%
BP-0264 264 31.7 70 92%
BP-0312 312 37.4 70 92%
BP-0376 376 45.1 70 92%
BP-0600 600 167 50 97%
BP-1000 1000 235 50 95%

 

bandgraph

THz Low Pass Filters

    • Our new terahertz (THz) low pass filter is constructed from a micro-structured material that blocks the visible through mid IR while passing THz beams. It is an excellent filter for optical THz generation systems such as time domain THz spectroscopy systems. It has optimal characteristics for use in zinc telluride based systems and for typical photo conductive switch systems as well. As can be seen in the figure below, the measured transmission in the 700 to 850 nm range is below .01%. At wavelengths longer than 975 nm the transmission is below .1%. These measurements were done with a laser beam spectrally filtered to the wavelength of interest from a super-continuum white light coherent source.

THz Low Pass Filter Visible To Mid IR Transmission Spectrum
Attenuator Transmissions

    • The transmission of THz waves is above 80% across the .1 to 3 THz range making this an excellent filter even for broadband THz applications. THz measurements were done up to 1 THz with our compact THz spectrometer (TScan-1000) and with additional optical THz generation for the above 1 THz range.

 

    • This can be seen in the figure below.

 

    • This filter is sold mounted in a 2″ diameter holder as shown in the photo above. The clear aperture of the filter is 43 mm

 

    •       Download THz Filters datasheet (PDF, 441 KB)

 

 

THz Attenuators

    • The attenuator set is ideal for applications where the terahertz signal needs to be attenuated to prevent detector saturation.

 

    • Additionally; the broad, flat transmission spectrum shown in figure 1 below makes this set good for both broad spectrum THz and BWO scanning applications. Whether the source is a photoconductive antenna, free electron laser, or backwards wave oscillator this attenuator set with its sputter coated thin film elements is capable of attenuating the signal uniformly.

 

    • The set consists of 4 thin film attenuators mounted for easy and rapid deployment. The external diameter of the attenuators are 68mm, and the clear aperture is 60mm. These attenuators may be used as single attenuators or in combination as needed giving additional flexibility and range. The four attenuators are 30%, 10%, 3%, and 1% transmission. The attenuation combinations possible are given in the table below.

Attenuator Set Transmission
Attenuator Transmissions

    •    Download Attenuator datasheet (PDF, 541 KB)

 

 

 

THz Polarizers

The Polarization Rotator is a wire grid polarizer combined with a mounted mirror placed at an adjustable distance behind the polarizer. It is designed to take an incoming linearly polarized signal and adjust the polarization elliptically.

Download Polarization Rotator Datasheet

Free Standing Wire Grid Polarizers

    • These polarizers are made of 10 µm, 15 µm or 20 µm tungsten wire wound on a circular frame with spacing ranging from 25 µm to 200 µm.

Download Datasheet

Download Wire Grid Polarizer Drawing, Top & Side View (PDF 28.2 KB)

Ordering Information:

Polarizer Model Wire diameter / Wire spacing (mm) Clear aperture / External diameter (mm)
G25 x 10-S 10 / 25 40 / 50
G30 x 10-S 10 / 30 40 / 50
G30 x 10-L 10 / 30 88 / 98
G45 x 10-S 10 / 45 40 / 50
G45 x 10-L 10 / 45 88 / 98
G50 x 20-S 20 / 50 40 / 50
G50 x 20-L 20 / 50 88 / 98
G60 x 15-S 15 / 60 40 / 50
G60 x 15-L 15 / 60 88 / 98
G80 x 15-S 15 / 80 40 / 50
G80 x 15-L 15 / 80 88 / 98
G100 x 20-S 20 / 100 40 / 50
G100 x 20-L 20 / 100 88 / 98
G200 x 20-S 20 / 200 40 / 50
G200 x 20-L 20 / 200 88 / 98

 

Thin Film Polarizers

Thin Film Terahertz Polarizers are designed for applications in the 0.1-3.0 THz range. The polarizers consist of any array of metal stripes fabricated on a polymer membrane using an ultrafast laser micromachining technique. Typical stripe widthand spacing are about 15um. THz thin film polarizers provide performance comparable to free-standing wire grids, such as G25S and G30S, made of 10um wires spaced by 25um and 30um respectively.

The main advantage of thin film THz polarizers is significantly larger clear aperture – up to 85mm in diameter. For comparison, the G25S and G30S free-standing wire grid polarizers are only available with clear apertures of 40mm.

MODEL NAME F15-L
METAL STRIPE WIDTH 15m
CLEAR STRIPE WIDTH 15um
EXTERNAL DAIMETER 98mm
CLEAR APERTURE 85mm

DOWNLOAD DATASHEET

 

 

Polarizer Holders

We carry two types of rotating holders for the wire grid polarizers or thin film polarizers.

Model RH1 is designed for 4″ diameter polarizers, and enables a 360° rotation.

Model RH2 is designed for 4″ diameter polarizers, and enables 2-axis adjustments and 360° rotation.

Polyethylene Lenses

The lenses are manufactured from a purified high-density polyethylene

Offer the best performance at frequencies below 1 THz and above 7 THz

Polyethylene is not transparent in visible and near-IR spectral ranges, so that the lenses can be used to block light

      • Polyethylene Lenses are sold mounted in a metal holder, as shown in this photo

 

 

Ordering Information:

Model Lens Type Holder Diameter/
Clear Aperture
Focal Length
PL-60 Bi-convex, spherical 2.75″ / 2″ 60 mm
PL-100 Bi-convex, spherical 2.75″ / 2″ 100 mm

 

The transmission spectra were measured for 2 mm thick slabs which corresponds to an average thickness of a lens (50 mm diameter, 100 mm focal length).

Polarization Rotator

Lotus TII Lasers

Deep UV Q-Switched Nd:YAG Laser Systems for LIDAR and Pulsed Laser Deposition (PLD)

Key Features:
– Max Pulse Energy:
-213nm – 35mJ
-266nm – 120 mJ
-355nm – 270mJ
-532nm – 400mJ
-1064nm – 700mJ
-Pulse Duration: 6-7ns; 15-17ns
-Pulse Repetition Rate: 10Hz

LS-2137N, LS-2145N, LS-2147N, LS-2137U
The laser design enables easy switching between output beams at 1064nm, 532nm, 355nm, 266nm, and 213nm without removing protective cover and additional alignment.  All wavelengths can be aligned along the same axis and a guide red laser beam is available as an option.

LS-2137U model is based on the industry standard VRM resonator, offering shorter pulses and higher harmonics conversion efficiency due to shorter pulses.  LS-2137N and LS-2147N use a unique resonator design enabling improved stability and beam quality.


Download Data Sheet

 

 

 

Double Pulsed Q-Switched Nd:YAG Lasers Optimized for Particle Image Velocimetry (PIV) and Laser Induced Breakdown Spectroscopy (LIBS)
Key Features:
– Pulse Energy:
-up to 300mJ at 1064nm
-up to 300mJ at 532nm
-up to 25mJ at 355nm
-Pulse Duration: 5-15ns
-Pulse Repetition Rate: 10-20Hz

LS-2132 PIV, LS-2145 PIV, LS-2145D and LS-2145 LIBS
LS-2145D lasers rely on a unique design; two independent laser resonators pumped by a single flash amp are integrated into one system.  This enables precise control of time delay between the pulses.  Other PIV and LIBS systems are more compact and generate shorter pulses.

All models are equipped with multiple triggering options:
Single shot push button trigger and continuous internal trigger from remote control, external TTL trigger, computer-controlled laser operation via RS-232.  Dual output ports allow each oscillator to operate independently.


Download Data Sheet

 

 

 

 

A Tunable Pulsed Ti:Sapphire Laser System Designed for Photoacoustic Imaging
Key Features:
-Pulse energy: 10-150mJ
-Tuning Range: 730-900nm
-Additional Outputs at: 1064 nm and 532 nm
-Computer control of output wavelength
-Fast tuning and switching

A unique feature of this laser system manufactured by Lotis-TII is a very high pulse energy, which enables single shot photoacoustic imaging without scanning.  The output wavelength can be tuned from pulse to pulse to obtain images across the laser tuning range 730-900nm.

These lasers rely on a unique resonator design enabling excellent stability and ease of operation.  It is fully integrated and includes power monitoring of 1064nm and 532nm outputs.


Download Data Sheet

 

 

 

 

 

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