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

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 ![]() |
SL Low-frequency spectroscopy 0.03 to 2 THz ![]() |
SP Standard-band spectroscopy 0.1 to 4 THz ![]() |
SU Wide-band spectroscopy 0.5 to 7 THz ![]() |
|
---|---|---|---|---|---|
Academic research |
Basic science
|
○ | ○ | ○ | ○ |
Material |
|
○ | ○ | − | − |
Chemical |
|
○ | − | ○ | ○ |
Food |
|
○ | − | ○ | ○ |
Pharmaceutical | Pill, solid medicine, active pharmaceutical ingredient
|
○ | ○ | ○ | ○ |
Terahertz Optical Sampling System TAS7500TS

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
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) |
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

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

- 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.
Structure of TAS1110/TAS1120
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)

- 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.
-
Principal of TAS1300
Beam profile (focusing)
-
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

- 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

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
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) |
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

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

- 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.
Structure of TAS1110/TAS1120
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)

- 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.
-
Principal of TAS1300
Beam profile (focusing)
-
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

- 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

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)

(Water Vapor Absorption)
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)

- 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.
Structure of TAS1120
Measured spectrum with TAS1120 and TAS1220.
Terahertz Detector Module TAS1220 

- 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 polarization analysis 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.