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	○	○	○	○

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

The system uses two channels of ultra short pulse lasers (1.55 ?m) 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	TFor THz generation: 1 ports, For THz detection: 1 ports

Measurement Specifications

General Specifications

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

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	TFor THz generation: 1 ports, For THz detection: 1 ports

Measurement Specifications

General Specifications

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

• 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

Specifications

Items	Specification		Notes
	TAS1110 (Standard)	TAS1120 (Low frequency range)
Generation method	Photoconductive antenna
Frequency range	0.1 to 4THz (*2)	0.03 to 2THz (*2)	Input power: 20 mW Laser pulse width: 50 fs
Input Optical Fiber Connector	φ3mm 1550nm Polarization maintaining fiber		Length: 1.5 m
Size	55mm × 20mm × 20mm		Without Fiber pigtail

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

• 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

Specifications

Items	Specification	Notes
Generation method	Cherenkov type THz wave generation using LiNbO3 waveguide
Bandwidth (SNR=1)	0.5 to 7THz (*2)	Input power: 20 mW Laser pulse width: 50 fs
Input Optical Fiber Connector	φ3mm 1550nm Polarization maintaining fiber	Length: 1.5 m
Size	43mm × 24mm × 21mm	Without Fiber pigtail

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

• 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

Items	Specification	Notes
Detection method	Photoconductive antenna
Bandwidth (SNR=1)	0.1 to 4 THz (Generator: TAS1110)	Input power: 20 mW Laser pulse width: 50 fs
	0.5 to 7 THz (Generator: TAS1130)
Dynamic range (Peak level)	≥60 dB (Generator: TAS1110) ≥57 dB (Generator: TAS1130)
TIA sensitive	9.7 × 106 V/A
TIA bandwidth	500 kHz	-3 dB bandwidth
Input Optical Fiber Connector	φ3 mm 1550 nm Polarization maintaining fiber	Length: 1.5 m
Size	55 mm × 20 mm × 20 mm	Without Fiber pigtail

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	TAS1230		TAS1230	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.