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 ?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
TAS7500TS Measurement
method | Terahertz optical sampling method
(phase modulation method) |
| Time resolution | 2 fs |
| Frequency resolution | 3.8 GHz | 7.6 GHz | 61.0 GHz |
| Scan range | 262 ps | 131 ps | 16 ps |
| Throughput | 16 ms/scan | 8 ms/scan | 1 ms/scan |
| Frequency accuracy | ±10 GHz (at 1.41 THz) (*1) |
(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) |
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 |
(*1): At temperatures of 23℃ ± 5℃
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 | TFor THz generation: 1 ports,
For THz detection: 1 ports |
Measurement Specifications
(TAS7500TS) Measurement
method | Terahertz optical sampling method
(phase modulation method) |
| Time resolution | 2 fs |
| Frequency resolution | 3.8 GHz | 7.6 GHz | 61.0 GHz |
| Scan range | 262 ps | 131 ps | 16 ps |
| Throughput | 16 ms/scan | 8 ms/scan | 1 ms/scan |
| Frequency accuracy | ±10 GHz (at 1.41 THz) (*1) |
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) |
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 |
(*1): At temperatures of 23℃ ± 5℃
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
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
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
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
