Terahertz wave spectroscopy and imaging analysis platform

The TAS7500TS is a Terahertz (THz) analysis system consisting of an optical fiber laser module and a data acquisition module, which are core parts of our terahertz spectroscopy system (TAS7500SP). Users complete the THz measurement system setup by simply connecting one of Advantest's THz source modules (TAS1110/TAS1130) and a detector module (TAS1230; sources and detectors sold separately). Flexible source selection and source/detector placement allows the user to generate customized experimental configurations.

Supports a wide range of terahertz research and applications

  • Super-high-speed terahertz optical sampling measurement (1msec/scan)
  • Fiber pigtails enable flexible layout of THz source/detector modules and optical sampling system
img_tas1000_0001

Features

  • 1msec/scan super-high-speed terahertz optical sampling measurement (TAS7500TS)
  • Flexible configuration of THz source/detector modules and optical components
  • Up to 4 meter optical path length
  • Configure with up to 2 different THz source and 2 detector modules (Optional)
  • Low frequency, standard and broadband coverage THz wave detectors

Product Lineup and Applicable Fields

Field / Product TS
Covers all
TS bands
0.03 to 7 THz
img_tas7500su_0001
 SL
Low-frequency
spectroscopy
0.03 to 2 THz
img_tas7500im_0001
 SP
Standard-band
spectroscopy
0.1 to 4 THz
img_tas7500sp_0001
 SU
Wide-band
spectroscopy
0.5 to 7 THz
img_tas7500sl_0001
Academic
research		 Basic science
−
Physics, chemistry,
medical, physiology
 ○ ○ ○ ○
Material
−
Electronical and insulating
materials for 5G and 6G
−
Radio wave absorber
 ○ ○ − −
Chemical
−
Liquid crystal
−
Polymer, rubber
−
Glass, etc.
 ○ − ○ ○
Food
−
Beverage, alcoholic liquor,
flavoring
 ○ − ○ ○
Pharmaceutical Pill, solid medicine,
active pharmaceutical ingredient
−
Crystal, hydrate
−
Density, hardness,
tensile strength
Biological medicine 		○ ○ ○ ○

Terahertz Optical Sampling System TAS7500TS

img_tas1000_0000

High-end system with fast analysis & best-in-class measurement accuracy

The system uses two channels of ultra short pulse lasers (1.55 µm) with either biased output (for THz generation) or signal input (for THz detection). Advantest's unique optical sampling method, utilizing phase-modulated dual-laser-synchronized control technology without a mechanical optical delay line, enables extremely high speed terahertz spectroscopy.

Specifications

System configuration

Dual repetition rate synchronized fiber laser (for THz generation and detection), laser driver, synchronizer, data correction, and analysis PC

Excitation Laser
Center wavelength 1550 nm
Output power ≥20 mW (Option: Max. 50 mW) (*1)
Pulse width ≤50 fs (Using 1.5 m fiber) (*1)
Repetition rate 50 MHz
Optical output port For THz generation: 1 port,
For THz detection: 1 port
Measurement Specifications

TAS7500TS
Measurement method Terahertz optical sampling method
(phase modulation method)
Time resolution 2fs
Frequency resolution 3.8GHz 7.6GHz 61.0GHz
Scan range 262ps 131ps 16ps
Throughput 16ms/scan 8ms/scan 1ms/scan
Frequency accuracy ±10 GHz (at 1.41 THz) (*1)

(TAS7400TS)
Measurement method Terahertz optical sampling method
(phase modulation method)
Time resolution 2fs
Frequency resolution 1.9GHz 7.6GHz
Scan range 524ps 131ps
Throughput 200ms/scan
Frequency accuracy ±10 GHz (at 1.41 THz) (*1)

(*1): At temperatures of 23°C±5°C

General Specifications
  Analysis unit Measurement unit
Size 430(W)×540(D)×330(H) mm 430(W)×240(D)×220(H) mm
Weight 30kg or less 14kg or less
Basic Configuration
Basic Configuration

Terahertz Source Module
TAS1110 (Standard Type: 0.1 - 4 THz) / TAS1120 (Low frequency type: 0.03 - 2 THz)

img_tas1000_0002
  • Easy to use all-in-one THz source; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are generated by introducing 1.55 μm ultra short laser pulses.
  • Suppression of THz wave amplitude variation caused by fluctuations of temperature using an on-state current monitor and a thermistor embedded in the bias circuit.
  • img_tas1000_0001_jp

    Structure of TAS1110/TAS1120

  • img_tas1000_0002_jp

    TSpectral amplitude of TAS1110
    (Using THz wave detection module TAS1230)

Intended purpose

  • THz time-domain spectroscopy

Terahertz Source Module TAS1130 (Broadband type: 0.5 - 7 THz)

img_tas1000_0005
  • Cherenkov type THz wave source module utilizing non-linear optical crystal (LiNbO3) waveguide.
  • Achieves excellent spectral flatness compared to a conventional photoconductive antenna (PCA) and significantly lower spectral absorption compared to using bulk crystals.
  • Compact and easy-to-operate: simply introduce excitation light into the input pigtail fiber.

  • img_tas1000_0003_jp

    Principal of TAS1300

    img_tas1000_0003_jp

    Beam profile (focusing)

  • img_tas1000_0004_jp

    Spectral comparison of Cherenkov source and previous terahertz source

Intended usage

  • Broadband THz wave source for time-domain spectroscopy
  • Difference frequency generation of THz waves
  • THz frequency comb generation

Terahertz Detector Module TAS1230

img_tas1000_0009
  • Easy to use all-in-one THz detector; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are sampled by introducing 1.55 μm ultra short laser pulses.
  • Built-in transimpedance (current-voltage transfer) amplifier with 500 kHz bandwidth makes for a simpler measurement system.

Specifications

Terahertz Source Module TAS1110/1120/1130
Items Specification
TAS1110
(Standard type)		 TAS1120
(Low frequency type)		 TAS1130
(Broadband type)
Generation method Photoconductive antenna Cherenkov type THz wave generation using LiNbO3 waveguide
Frequency range(*) 0.1 to 4THz 0.03 to 2THz 0.5 to 7THz
Input Optical Fiber Connector φ3mm 1550nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55mm × 20mm × 20mm 43mm × 24mm × 21mm

(*) When using the TAS1230 detector module to measure samples with the TAS7500TS at 7.6GHz

Terahertz Detector Module TAS1230
Items Specification
Detection method Photoconductive antenna
Dynamic range (Peak level)(*) ≥70dB (Generator: TAS1110, TAS1130)
≥60dB (Generator: TAS1120) (at frequency resolution: 7.6 GHz)
TIA sensitive 9.7 × 106 V/A
TIA bandwidth 500 kHz (-3 dB)
Input Optical Fiber Connector φ3 mm 1550 nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55 mm × 20 mm × 20 mm

(*) The peak level frequency varies in each system, and the dynamic range on each frequency varies in each system.

Terahertz Optical Sampling System TAS7400TS

img_tas7400ts

Affordably priced multi-purpose terahertz spectroscopy system with best-in-class measurement accuracy

The system uses two channels of ultra short pulse lasers (1.55 μm) with either biased output (for THz generation) or signal input (for THz detection). Based on Advantest's TAS7500TS high-end terahertz spectroscopy system, the TAS7400TS offers bes-in-class measurement accuracy at a lower price.

Specifications

System configuration

Dual repetition rate synchronized fiber laser (for THz generation and detection), laser driver, synchronizer, data correction, and analysis PC

Excitation Laser
Center wavelength 1550 nm
Output power ≥20 mW (Option: Max. 50 mW) (*1)
Pulse width ≤50 fs (Using 1.5 m fiber) (*1)
Repetition rate 50 MHz
Optical output port For THz generation: 1 port,
For THz detection: 1 port
Measurement Specifications

TAS7400TS
Measurement
method		 Terahertz optical sampling method
(phase modulation method)
Time resolution 2 fs
Frequency resolution 1.9 GHz 7.6 GHz
Scan range 524 ps 131 ps
Throughput 200 ms/scan
Frequency accuracy ±10 GHz (at 1.41 THz) (*1)

(TAS7500TS)
Measurement method Terahertz optical sampling method
(phase modulation method)
Time resolution 2fs
Frequency resolution 3.8GHz 7.6GHz 61.0GHz
Scan range 262ps 131ps 16ps
Throughput 16ms/scan 8ms/scan 1ms/scan
Frequency accuracy ±10 GHz (at 1.41 THz) (*1)

(*1): At temperatures of 23°C±5°C

General Specifications
  Analysis unit Measurement unit
Size 430(W)×540(D)×330(H) mm 430(W)×240(D)×220(H) mm
Weight 30kg or less 14kg or less
Basic Configuration
TAS7400 Basic Configuration

Terahertz Source Module
TAS1110 (Standard Type: 0.1 - 4 THz) / TAS1120 (Low frequency type: 0.03 - 2 THz)

img_tas1000_0002
  • Easy to use all-in-one THz source; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are generated by introducing 1.55 μm ultra short laser pulses.
  • Suppression of THz wave amplitude variation caused by fluctuations of temperature using an on-state current monitor and a thermistor embedded in the bias circuit.
  • img_tas1000_0001_jp

    Structure of TAS1110/TAS1120

  • img_tas1000_0002_jp

    TSpectral amplitude of TAS1110
    (Using THz wave detection module TAS1230)

Intended purpose

  • THz time-domain spectroscopy

Terahertz Source Module TAS1130 (Broadband type: 0.5 - 7 THz)

img_tas1000_0005
  • Cherenkov type THz wave source module utilizing non-linear optical crystal (LiNbO3) waveguide.
  • Achieves excellent spectral flatness compared to a conventional photoconductive antenna (PCA) and significantly lower spectral absorption compared to using bulk crystals.
  • Compact and easy-to-operate: simply introduce excitation light into the input pigtail fiber.

  • img_tas1000_0003_jp

    Principal of TAS1300

    img_tas1000_0003_jp

    Beam profile (focusing)

  • img_tas1000_0004_jp

    Spectral comparison of Cherenkov source and previous terahertz source

Intended usage

  • Broadband THz wave source for time-domain spectroscopy
  • Difference frequency generation of THz waves
  • THz frequency comb generation

Terahertz Detector Module TAS1230

img_tas1000_0009
  • Easy to use all-in-one THz detector; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are sampled by introducing 1.55 μm ultra short laser pulses.
  • Built-in transimpedance (current-voltage transfer) amplifier with 500 kHz bandwidth makes for a simpler measurement system.

Specifications

Terahertz Source Module TAS1110/1120/1130
Items Specification
TAS1110
(Standard type)		 TAS1120
(Low frequency type)		 TAS1130
(Broadband type)
Generation method Photoconductive antenna Cherenkov type THz wave generation using LiNbO3 waveguide
Frequency range(*) 0.1 to 4THz 0.03 to 2THz 0.5 to 7THz
Input Optical Fiber Connector φ3mm 1550nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55mm × 20mm × 20mm 43mm × 24mm × 21mm

(*) When using the TAS1230 detector module to measure samples with the TAS7500TS at 7.6GHz

Terahertz Detector Module TAS1230
Items Specification
Detection method Photoconductive antenna
Dynamic range (Peak level)(*) ≥60dB (Generator: TAS1110, TAS1130)
≥50dB (Generator: TAS1120) (at frequency resolution: 7.6 GHz)
TIA sensitive 9.7 × 106 V/A
TIA bandwidth 500 kHz (-3 dB)
Input Optical Fiber Connector φ3 mm 1550 nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55 mm × 20 mm × 20 mm

(*) The peak level frequency varies in each system, and the dynamic range on each frequency varies in each system.

Terahertz Spectroscopic Analysis System TAS7400TS + High Frequency Resolution Option PYSI74-10MNIS

img_tas7400ts_option

This is an option for Advantest’s terahertz optical sampling analysis systems. It is suitable for evaluating the frequency characteristics of radio wave absorbers, printed circuit board materials, polymer materials, etc., which are indispensable for the next-generation wireless communication technology (beyond 5G/6G) and millimeter-wave radar used in ADAS (advanced driver assistance systems).
in a wide range of fields for evaluation of properties including transmission characteristics (transmittance, reflectance) and complex permittivity of various materials in the millimeter wave to terahertz region.

[New] Frequency characteristics evaluation system with millimeter-wave to terahertz region coverage

  • High frequency resolution: 380 MHz
  • Measurement of a wide range (30 GHz to 2 THz) is possible without switching frequency extenders
  • 40 ms scan speed enables high-throughput waveform sampling sweeping of a broad bandwidth
  • Easy to switch measurement mode (transmission/reflection) of measurement systems, easy calibration
  • Remote programming function enables measurement to be linked with other measurement instruments and automatic stages. (Option: Automatic Control Measurement)
Comparison of Frequency Resolution on Around 0.57 THz
(Water Vapor Absorption)

Introduction Movies

Solution
Product

Proposed of system configuration (30 GHz to 2 THz)

Specifications

System configuration

Dual repetition rate synchronized fiber laser (for THz generation and detection), laser driver, synchronizer, data correction, and analysis PC

Excitation Laser
Center wavelength 1550 nm
Output power ≥20 mW (Option: Max. 50 mW)(*1)
Pulse width ≤50 fs (Using 1.5 m fiber)(*1)
Repetition rate 50MHz
Optical output port For THz generation: 1port
For THz detection: 1port

(*1) At temperatures of 23°C±5°C

Measurement Specifications
Frequency resolution 380 MHz(*2), 1.9 GHz, 7.6 GHz
Throughput 40 ms/scan(*2), 200 ms/scan
Frequency Accuracy ±5 GHz (at 0.557 THz)(*2), ±10 GHz (at 1.41 THz)
Analysis / display function Transmittance, Reflectance, Phase shift, Complex permittivity, loss tangent (tanδ)

(*2) When high frequency resolution option is installed

Terahertz Source Module TAS1120 (Low frequency type: 0.03 - 2 THz)

img_tas1000_0002
  • Easy to use all-in-one THz source; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are generated by introducing 1.55 µm ultra short laser pulses.
  • Suppression of THz wave amplitude variation caused by fluctuations of temperature using an on-state current monitor and a thermistor embedded in the bias circuit.
  • img_tas1000_0001_jp

    Structure of TAS1120

  • img_tas1000_0002_jp

    Measured spectrum with TAS1120 and TAS1220.

Terahertz Detector Module TAS1220

img_tas1000_0009
  • Easy to use all-in-one THz detector; a photoconductive antenna and a hyper-hemispherical silicon lens are included in a fiber pigtailed compact housing.
  • THz waves are sampled by introducing 1.55 μm ultra short laser pulses.
  • Built-in transimpedance (current-voltage transfer) amplifier with 500 kHz bandwidth makes for a simpler measurement system.
  • To be used with TAS1120 Terahertz Source Module (0.03 to 2 THz)

Specifications

Terahertz Source Module TAS1120 (Low frequency type)
Generation method Photoconductive antenna
Bandwidth (SNR=1)(*) 0.03 to 2 THz
Input Optical Fiber Connector φ3 mm 1550 nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55 mm × 20 mm × 20 mm

(*) When using the TAS1220 detector module to measure samples with the TAS7500TS at 7.6GHz

Terahertz Detector Module TAS1220
Generation method Photoconductive antenna
Dynamic range (Peak level) ≥50dB (Source: TAS1120) (at resolution: 7.6 GHz)
TIA sensitive 9.7 × 106 V/A (at resolution: 7.6 GHz)
TIA bandwidth (-3dB) 500 kHz
Input Optical Fiber Connector φ3 mm 1550 nm Polarization maintaining fiber (Length: 1.5 m)
Size (without fiber pigtail) 55mm × 20mm × 20mm

* Specifications and external view are subject to change without notice

Optical stages dedicated for TAS7500TS/TAS7400TS, which achieve spectroscopic measurement (transmittance, reflectance and ATR measurements) and 2D spectroscopy/imaging (mapping) measurement

Outline Specifications of Spectroscopic Measurement Optical Sets

Model SHT-710068 SHT-710193 SHT-710157
Frequency band 2 THz 4 THz 7 THz 2 THz 4 THz 7 THz
Source module TAS1120 TAS1110 TAS1130*1 TAS1120 TAS1110 TAS1130*1
Detector module TAS1220 TAS1230 TAS1230 TAS1220 TAS1230
Mountable measurement module Transmittance, Reflectance Transmittance, Reflectance, ATR Transmittance, Reflectance, ATR –*2
Dry air purge cover Not required Not required Required*3
Size (W×D×H：mm)*4 450 × 220 × 290 450 × 264 × 312 870 × 490 × 220

*1) The NA conversion optical system for spectroscopic measurements (SHT-210101) is required.

*2) Customers should prepare an optical system for measurement.

*3) An acrylic cover is available. Please consult with us separately for detailed specifications.

*4) The heights are the maximum values. They may differ depending on the measurement module to be mounted, etc.

1) Terahertz spectroscopic measurement base for up to 4 THz (2 THz): SHT-710068

2) Terahertz spectroscopic measurement base for up to 7 THz: SHT-710193

  • This optical set can use various spectroscopic measurement modules for terahertz spectroscopic systems TAS7500 SL/SP/SU.
  • It does not require complicated optical adjustments and allows for easy measurement.
  • This compact spectroscopic module does not take time to perform dry air purge for moisture removal.
  • The transmittance module can also perform temperature control measurement by mounting an option (TAS1020/TAS1030).

SHT-710193 with the transmittance module (SHT-2100037) mounted

Spectroscopic measurement modules

Transmittance module
Transmittance polarization analysis module
Reflectance module
ATR module
Temperature control module
(for transmittance modules)
TAS1020/TAS1030

3) Stage for spectroscopic measurement (general-purpose type): SHT-710157

  • This optical set requires customers themselves to form an optical layout.
  • It has a wide sample and jig layout area and also allows measurements using a cryostat, etc.
  • The source and detector optical sections are slidable, which allows arbitrary optical layout for a transmittance or reflectance system, etc. according to the application.

  • Example of a measurement system using a large-sized cryostat

Terahertz Spectroscopy Imaging Optical Set: SHT-710122X04

  • This optical set enables 2D spectroscopy and imaging measurements by scanning samples set on the XY stage.
  • It can perform transmittance and reflectance measurements by switching optical layouts.
  • Spectroscopic measurements of large-sized samples and wide-range spectroscopy and imaging measurements are possible.
  • Using the provided dedicated software enables 2D mapping and spectroscopic analysis at each measurement point.

  • Example of reflection ratio 2D map of a conductive coating by using SHT-710122X04

  • Transmittance measurement mode

  • Reflectance measurement mode

Specifications for SHT-710122X04

Model SHT-710122X04※1
Frequency band 2 THz 4 THz 7 THz
Source module TAS1120 TAS1110 TAS1130※2
Detector module TAS1220 TAS1230
Measurement mode Transmittance and reflectance *3
Scan range Max. 150 mm × 150 mm
Scan resolution Min. 0.2 mm
Scan method Raster scan
Measurable sample size Max. 150 mm × 150 mm, Thickness: 45 mm
Measurement time per point *4 Min. Approx. 1 s (@TAS7500TS, Resolution: 7.6 GHz, Accumulated count 1)
Approx. 2 s (@TAS7400TS, Resolution: 7.6 GHz, Accumulated count 1)
Terahertz spot size < 1 mm (at 2 THz)
< 6 mm (at 0.3 THz)
Measurement position (height)
adjustment mechanism
in reflectance measurement		 Stage height Reference height: ± 5 mm (manual)
Terahertz wave light collection height Reference height: 0 to +40 mm (10 mm step)

*1: The following software is required:

  • Spectroscopy and imaging software (STAS14015SE-01)
  • Automatic control license (PYS174-08MNIS or PYS175-08MNIS)
  • Microsoft Excel 64-bit version

*2: The NA conversion optical system for spectroscopy and imaging (SHT-210151) is required.

*3: During reflectance measurement, the angle of incidence is fixed to 10°.

*4: Excluding the sample travel time.