Terahertz wave spectroscopy and imaging analysis platform

• 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

Field ＼ Product
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

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

General Specifications

	Analysis unit	Measurement unit
Size	430(W) × 540(D) × 330(H) mm	430(W) × 240(D) × 220(H) mm
Weight	28 kg or less	14 kg or less

Basic Configuration

• 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.

Intended purpose

• THz time-domain spectroscopy

• 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.

Intended usage

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

• 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.

Terahertz Source Module TAS1110/1120/1130

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

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

Terahertz Detector Module TAS1230

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

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

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

General Specifications

	Analysis unit	Measurement unit
Size	430(W) × 540(D) × 330(H) mm	430(W) × 240(D) × 220(H) mm
Weight	28 kg or less	14 kg or less

Basic Configuration

• 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.

Intended purpose

• THz time-domain spectroscopy

• 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.

Intended usage

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

• 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.

Terahertz Source Module TAS1110/1120/1130

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

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

Terahertz Detector Module TAS1230

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

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

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). It can be used 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.

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

(*1) At temperatures of 23°C±5°C

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: 1port For THz detection: 1port

Measurement Specifications

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

(*2) When high frequency resolution option is installed

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

• 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.

• 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)

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

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

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

*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.

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) 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).

Spectroscopic measurement modules

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.