High-Speed Terahertz ASOPS Time-Domain Spectrometer

Name

Service

Non-destructive evaluation on but not limited to semiconductor materials, doping mapping, solar cells micro-cracks, sealed ICs, packaged electronics, chemical identification and mapping, art painting and heritage conservation.

Specification

Description:

In time resolved measurements an ultrafast pulse triggers a reaction and a second pulse takes a snapshot of the induced change. By shifting the arrival time of the probe pulse with respect to the pump pulse the stimulated process can be followed in time. The asynchronous optical sampling (ASOPS) technique allows high-speed scanning over some nanoseconds of time delay without a mechanical delay line. The ultrafast laser delivering the pump and probe pulses are locked together at a tunable repetition rate difference. The lasers can be also locked to the same repetition rate value and by shifting the relative phase between the laser pulses, the system will allow measurements in a reduced time window of some 100 ps. Switching between the two modes of operation can be done at the touch of a button.

Repetition Rate	100 MHz
Repetition rate offset tuning	Δf = [-10 kHz, 10 kHz] in steps of 10^-5 Hz
Central Wavelength	1560 nm / 780 nm
Average Power	> 500 mW (1560 nm) / > 250 mW (780 nm)
Pulse Width	< 60fs
Scan Speed	10000 traces/s (time measurement window: 10ns)
Dynamic Range	40 dB in < 1ms; 60 dB in < 1s

Charge:

A. TOP Center Member (NTHU)

NTD 400/30mins
NTD 4000/day

B. Academic Institution

NTD 800/30mins + NTD 500 (basic operation fee)
NTD 8000/day

C. Non-academic Institution

NTD 1200/30mins + NTD 500 (basic operation fee)
NTD 12000/day with consultation

Contact

Prof. Shang-Hua Yang

Email: shanghua@ee.nthu.edu.tw

Phone: +886-3-516-2435

Mr. Yi-Chun Hung

Email: nick831111@gmail.com

Phone: +886-3-571-5131 ext: 34923 (lab)

Photo

High-Speed Terahertz ASOPS Time-Domain Spectrometer

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